CERAMIC BEARINGS
AND BEARINGS
CERAMIC BEARINGS AND
BEARINGS
EXTREME SPECIAL ENVIRONMENTS
TM
This catalog has been printed on paper of 100% waste
paper pulp using environmentally friendly soy ink.
CERAMIC BEARINGS AND EXSEV BEARINGS FOR EXTREME SPECIAL ENVIRONMENTS
FOR
CAT. NO. B2004E
Printed in Japan '06.03-1CDS ('05.06)
FOR
EXTREME SPECIAL ENVIRONMENTS
CAT. NO. B2004E
CERAMIC BEARINGS AND
FOR
BEARINGS
EXTREME SPECIAL ENVIRONMENTS
CAT. NO. B2004E
✩ JTEKT CORPORATION does not expor t its products and
engineering know-how unless in compliance with the Foreign
Exchange and Foreign Trade Control Act and other applicable
trade-related regulations, if they are so covered by such act and
regulations. Accordingly, please contact our branch office or sales
office if you intend to export any product described in this catalogue.
✩ The contents of this catalogue are subject to change without prior notice. We took
special care in preparing the contents of this catalogue. JTEKT does not accept liability
for errors, omissions, or missing pages, or any loss incurred from the use of this
catalogue.
Reproduction of this catalogue or any part there of
without JTEKT's prior permission is strictly prohibited.
Products and Applications
Development and Manufacturing Facilities
1
CERAMIC BEARINGS AND
FOR
EXTREME SPECIAL ENVIRONMENTS
BEARINGS
CONTENTS
Bearings: Composition and Selection
1 Ceramic Bearings and Special Steel Bearings ................................... 3
2 Lubricants for EXSEV Bearings ........................................................ 11
3 How to Select EXSEV Bearings ....................................................... 14
4 EXSEV Bearings with Special Characteristics ................................. 19
2
Bearings and Other
Products
1 Ceramic Bearings and EXSEV Bearings: Table of Specifications ........ 23
2 Ceramic Bearings and EXSEV Bearings: Table of Characteristics ...... 25
3 Radial Ball Bearings ......................................................................... 29
4 K Series Full Complement Hybrid Ceramic Ball Bearing ........................ 63
5 Linear Motion Bearings ..................................................................... 65
6 High Ability Angular Contact Ball Bearings ....................................... 85
7 Ceramic Balls.................................................................................... 88
8 Accuracy and Internal Clearance of Ceramic Bearings
and EXSEV Bearings........................................................................ 89
3 Application Examples
1 Clean Environments ......................................................................... 93
2 Vacuum Environments ..................................................................... 97
3 High Temperature Environments ...................................................... 99
4 Corrosive Environments ................................................................. 101
5 Magnetic Field Environments ......................................................... 104
6 Electric Field Environments ............................................................ 105
7 High Speed Applications ................................................................ 107
4 Supplementary Tables
1 Shaft Tolerances ............................................................................ 113
2 Housing Bore Tolerances ............................................................... 115
3 Numerical Values for Standard Tolerance Grades IT..................... 117
4 Steel Hardness Conversion ............................................................ 118
5 SI Units and Conversion Factors .................................................... 119
6 Inch/millimeter Conversion ............................................................. 123
7 Cleanliness Classes ....................................................................... 124
Specifications Sheet
Products and Applications
Corrosive
Ceramic Bearings and
Full Complement Ceramic Ball Bearings
Bearings for Extreme Special Environments
SK Bearings
are used for a wide range of the state of the art technologies.
Corrosion Resistant Hybrid Ceramic Bearings
Ceramic Bearings
Corrosion Resistant Ceramic Bearings
Corrosion Resistant
Ceramic Bearing
App
li c a
High Corrosion Resistant Ceramic Bearings
ti o
nR
e
High Speed
qu
ir e
m
en
ts
Electric field
Full Complement Ceramic Ball Bearings
Corrosion Resistant Hybrid Ceramic Bearings
Ceramic Bearings
Hybrid Ceramic Bearings
Ceramic Bearings
High Ability Angular Contact Ball Bearings
A p p li c a
Corrosion Resistant Ceramic Bearings
Hybrid Ceramic Bearings
ir
em
m
eq
en
R
ts
n
u
Clean
en
ts
Clean Pro Bearings
Ap
n
tio
ca
pli
R
u
eq
ir
e
High temperature
High Temperature Clean Pro Bearings
High Temperature Clean Pro Bearings
Clean Pro Bearings
WS Bearings
DL Bearings
Clean Pro Bearings
Corrosion Resistant Hybrid Ceramic Bearings
High Temperature Clean Pro Bearings
Ceramic Bearings
Clean Pro PRA Bearings
Corrosion Resistant Ceramic Bearings
DL Bearings
High Corrosion Resistant Ceramic Bearings
PN Bearings
Vacuum
Clean Pro PRA Bearings
High Corrosion Resistant Ceramic Bearings
Non-magnetic Hybrid Ceramic Bearings
Bearings
ti o
Hybrid Ceramic Bearings
Hybrid Ceramic Bearings
X-ray Tube Units
MO Bearings
Full Complement
Ceramic Ball Bearings
High Temperature Hybrid Ceramic Bearings
Full Complement Ceramic Ball Bearings
Magnetic field
PN Bearings
Non-magnetic Hybrid Ceramic Bearings
WS Bearings
Full Complement Ceramic Ball Bearings
K series Full Complement Hybrid Ceramic Ball Bearings
MO Bearings
Ceramic Bearings
MG Bearings
Corrosion Resistant Ceramic Bearings
Full Complement Ceramic Ball Bearings
High Corrosion Resistant Ceramic Bearings
Corrosion Resistant Hybrid Ceramic Bearings
Ceramic Bearings
Corrosion Resistant Ceramic Bearings
High Corrosion Resistant Ceramic Bearings
Non-magnetic Hybrid Ceramic Bearings
K series Full Complement Hybrid Ceramic Ball Bearings
MG Bearings
Non-magnetic Hybrid
Ceramic Bearing
Non-magnetic Hybrid Ceramic Bearing
Development and
Manufacturing Facilities
By continuously incorporating new
improvements, Koyo Ceramic Bearings and
Bearings are applicable in more
technologies than ever.
Technologies are advancing rapidly and bearings are required to satisfy more
complicated and varied requirements under increasingly hostile operating
conditions.
In response to such needs, JTEKT is committed to the development and
manufacture of the EXSEV Bearing Series using the latest research/development
and manufacturing facilities.
JTEKT intends to supply products that live up to customers' expectations, while
contributing to environmental conservation and energy saving through
streamlined manufacturing.
q
e
eIon plating facility
rAssembly in a clean room
tCeramic ball manufacturing line
w
r
qCorrosion resistant bearing tester
wSputtering machine
Plasma chemical vapor
deposition system
Research & Development Centers
t
Bearing Business Operations Headquarters
Tokushima Plant
1
Bearings:
Composition and Selection
1 Ceramic Bearings and Special Steel Bearings
1-1
■ Properties of ceramic materials
■ Load ratings and service life of ceramic bearings
1-2
Conventional bearings, made from bearing steel, and lubricants such as oil and grease, may not be applicable in an extreme
special environment such as a clean room, vacuum, high temperature application or corrosive environment, or when special
Ceramic Bearings .............................................................................................................................. 3
Special Steel Bearings ........................................................................................................... 10
2 Lubricants for
characteristics are required, such as being non-magnetic, or insulating, or having superior high speed performance.
Bearings
2-1
Grease ............................................................................................................................................................ 11
2-2
Solid Lubricants ................................................................................................................................ 12
Koyo EXSEV Bearings are a special bearing series, developed specifically to address such needs.
Please consult JTEKT when using bearings in a new, unprecedented environment, or when bearings with special characteristics
are required.
3 How to Select
Bearings
3-1
Clean Environments ................................................................................................................... 14
3-2
Vacuum Environments ........................................................................................................... 15
3-3
High Temperature Environments............................................................................ 16
3-4
Corrosive Environments ....................................................................................................... 17
4
Bearings with Special Characteristics
4-1
Non-magnetic Bearings ........................................................................................................ 19
4-2
Insulating Bearings ...................................................................................................................... 19
4-3
High Speed Bearings................................................................................................................ 20
CERAMIC BEARINGS AND
1 Ceramic Bearings and Special Steel Bearings
Ceramic Bearings
■ Properties of ceramic materials
1) Material characteristics
Table 1-1 below lists the mechanical and physical properties of major ceramic materials used as bearing materials. Table 1-2 compares
silicon nitride and high carbon chromium bearing steel.
Property
Density
Unit
g/cm
–1
K
Vickers hardness
HV
6.0
3.1
10.5✕10–6
3.9✕10–6
1 500
1 200
2 200
320
220
380
0.29
0.31
0.16
1 100
1 400
500
6
5
4
Poisson's ratio
MPa
MPa · m1/2
Fracture toughness
Heat resistance (in atmospheric air)
˚C
800
200
1 000 or higher
Thermal shock resistance
˚C
750 or higher
350
350
Coefficient of thermal conductivity
W/(m · K)
20
3
70
Specific heat
J/(kg · K)
680
460
670
● Table 1-2
Comparison of characteristics of silicon nitride and high carbon chromium bearing steel
Property
Density
Silicon Nitride High Carbon Chromium Bearing Steel
Unit
Si3N4
SUJ2
g/cm3
3.2
7.8
Decreased internal clearance change due to reduced bearing temperature rises
➔ Lowered vibration and reduced preload changes
3.2✕10–6
12.5✕10–6
Vickers hardness
HV
1 500
750
Module of longitudinal elasticity GPa
320
208
Poisson's ratio
0.29
0.3
800
180
Retention of superior load carrying characteristics under high temperature
Useful in acid or alkaline solutions
Corrosion resistance
High
Low
Magnetism
Non-magnetic
Ferromagnetic
Conductivity
insulator
conductor
Covalent bond
Metallic bond
Bond
3
City water
Ball
Bearing steel
Ceramic
Load
Increased in stages at every 1.08 ✕ 107 cycles
Rotational speed
1 200 min–1
750
500
0
Silicon carbide
(SiC)
Lubricant
1.08
2.16
3.24
4.32
5.4
6.48
7.56
8.64
Stress loading cycles, ✕107
Fig. 1-1
Ball ( 9.525 mm )
Comparison in rolling fatigue life under oil lubrication
Flat ceramic plate
Load
1 250
1 000
Silicon nitride
(Si3N4)
● Test equipment appearance
750
Zirconia
(ZrO2)
500
250
0
Decrease in centrifugal force induced by rolling elements (balls or rollers)
➔ Longer service life and reduced bearing temperature rises
K–1
˚C
Water lubrication
Spindle oil
● Test equipment
Silicon carbide
(SiC)
Advantages of Ceramic Bearings
Linear expansion
coefficient
Heat resistance
Oil lubrication
Lubricant
Silicon nitride
(Si3N4)
1 000
Silicon Carbide
SiC
3.2
GPa
Three point bending strength
Zirconia
ZrO2
● Test conditions
250
3.2✕10–6
3
Linear expansion coefficient
Module of longitudinal elasticity
Silicon Nitride
Si3N4
Zirconia
(ZrO2)
1 250
Mechanical and physical properties of ceramic materials used as bearing materials
Ceramic Material
1
The individual ceramic materials were tested for rolling fatigue
under oil lubrication and under water lubrication, to evaluate their
applicability as bearing material. Figs. 1-1 and 1-2 show the
results of the tests.
The figures indicate that each ceramic material has a certain
level of rolling fatigue strength and that silicon nitride has the
highest fatigue strength among the ceramic materials tested.
Ceramic Bearings are highly heat resistant, enabling a rolling bearing
to be practical in a high temperature environment. The low density of
ceramic decreases the centrifugal force induced by rolling elements
(balls or rollers), contributing to an increased speed of the apparatus.
Ceramic Bearings, including components made from ceramic, have
the special properties that steel bearings do not have, such as being
non-magnetic or insulating. They can be used in new applications
where conventional bearings have not been practical.
● Table 1-1
2) Rolling fatigue of ceramic materials
Load (per ball), N
1-1
high temperature application, or corrosive condition, and to
realize special characteristics, such as being non-magnetic,
or insulating, or having superior high speed performance.
The EXSEV Bearing series consist of Ceramic Bearings
and Special Steel Bearings, depending on the specific
materials of the components.
Ceramic Bearings and Special Steel Bearings
The EXSEV Bearing Series has been developed for use in
special applications where conventional bearings are not
practical.
The EXSEV Bearings incorporate components made from
special material and use special lubricants, to be applicable in
extreme special environments such as a clean room, vacuum,
1
Load (per ball), N
EXSEV Bearings: Composition and Selection
1
BEARINGS
1.08
2.16
3.24
4.32
5.4
6.48
7.56 8.64
Stress loading cycles, ✕107
Fig. 1-2 Comparison in rolling fatigue life under water lubrication
Less deformation in rolling contact areas
➔ Higher rigidity
Fig. 1-3
Rolling fatigue life test conditions and test equipment
Decreased rotational fluctuation in ferromagnetic field due to non-magnetization
Prevents electrical pitting
Decrease in adhesion (or material transfer) due to oil film thinning in rolling contact areas
4
CERAMIC BEARINGS AND
BEARINGS
1
4) Composition of ceramic bearings
■ Load ratings and service life of ceramic bearings
Table 1-3 shows the results of evaluating the ceramic materials
in terms of their characteristics and the rolling fatigue strength.
Among the ceramic materials tested, silicon nitride is the most
suitable as rolling bearing material.
Koyo ceramic bearings are divided into Full Ceramic Bearings
(with all components, namely, the outer ring, inner ring and rolling
elements, made of ceramic) and Hybrid Ceramic Bearings (with
only the rolling elements made of ceramic). The outer ring and
inner ring of the Hybrid Ceramic Bearings are made from special
steel, including high carbon chromium bearing steel. The cage
may be made of a metallic material, resin, or composite material,
depending on the intended operating conditions of the bearing.
Silicon nitride, a ceramic material, is more rigid than high
carbon chromium bearing steel; therefore, a bearing including
silicon nitride components is subject to a higher contact stress on
the area of contact between bearing raceways and rolling
elements. Accordingly, to estimate the service life of ceramic
bearings, whether the rolling bearing theory is applicable or not is
critical.
JTEKT uses the silicon nitride produced by the hot isostatic
pressing (HIP) method as the standard ceramic material for
bearings.
Full Ceramic Bearing
Fig. 1-4
● Table 1-3
Basic dynamic load rating
The ISO standard defines the basic dynamic load rating as the
pure radial load (for radial bearings), constant in magnitude and
direction, under which the basic rating life of 1 million revolutions
can be obtained, when the inner ring rotates while the outer ring
is stationary or vice versa. The basic dynamic load rating
represents the resistance of a bearing against rolling fatigue.
Ceramic
1) Rolling fatigue life of ceramic bearings
1
A typical service life test for Ceramic Bearings and steel
bearings was performed under the conditions specified in Fig. 1-6.
The test results showed that the service life of Ceramic
Bearings was equal to or longer than that of steel bearings,
exceeding the calculated life.
The Ceramic Bearings were found to exhibit flaking (Fig. 1-5)
when their service life terminated. The same phenomenon was
observed on the steel bearings whose service life terminated.
Based on these findings, as the dynamic load rating of a Ceramic
Bearing, that of a steel bearing of the same dimensions can be used.
Hybrid Ceramic Bearing
Composition of ceramic bearings
Ratings of ceramic materials as rolling bearing materials
Application to rolling bearings
Rating
Performance and use
Characteristics
Silicon nitride
Si3N4
◎
· Comparable to bearing steel in load carrying capability and service life
· Suitable for high performance applications
· High speed
· High vacuum · Corrosion resistant
· Heat resistant · Non-magnetic · High rigidity
Zirconia
ZrO2
○
· Useful under a limited load
· Applicable in highly corrosive chemicals
· Highly corrosion resistant
Silicon carbide
SiC
○
· Useful under a limited load
· Applicable in highly corrosive chemicals
· Highly corrosion resistant
· Highly heat resistant
Basic static load rating
The basic static load rating is defined as the static load which
corresponds to the calculated contact stress shown below, at the
center of the most heavily loaded raceway/rolling elements.
Self-aligning ball bearings : 4 600 MPa
Other ball bearings
: 4 200 MPa
Roller bearings
: 4 000 MPa
Ceramic ball
Fig. 1-5
● Table 1-4
Load ratings of ceramic bearings
Full Ceramic Bearing
Hybrid Ceramic
Bearing
Dynamic load rating Comparable to steel
Cr
bearings
Comparable to steel
bearings
Static load rating Comparable to steel
C0r
bearings
85% that of steel
bearings
Flaking on ceramic ball and inner ring
Full Ceramic Bearing
NC6206
Steel bearing
6206
70
JTEKT defines the dynamic load rating and static load rating of
ceramic bearings based on the results of their service life tests,
the maximum allowable static load of the ceramic materials, the
elastic deformation test results of high carbon chromium bearing
steel, and other related data, as shown in Table 1-4.
Ceramic inner ring
50
30
10
5
1
2
4
6
8 10
20
Calculated life ratio
(actual life/calculated life)
The steel bearings here refer to bearings consisting of rings and rolling
elements both made of high carbon chromium bearing steel.
● Rolling fatigue test conditions
Bearing number Material (outer/inner rings and balls)
NC6206
Silicon nitride(Si3N4)
6206
Bearing steel(SUJ2)
Dimensions, mm
30 ✕ 62 ✕ 16
(bore ✕ outside dia. ✕ width)
Specification
Condition
Load
5 800 N
Rotational speed
8 000 min–1
Lubrication oil
AeroShell Turbine Oil 500
Temperature
70 ± 2 ˚C
Fig. 1-6 Rolling fatigue life of Full ceramic bearings and steel bearings
5
6
Ceramic Bearings and Special Steel Bearings
3) Ceramic materials suitable for rolling bearings
Failure, %
EXSEV Bearings: Composition and Selection
1
CERAMIC BEARINGS AND
BEARINGS
1
2) Static load rating of ceramic bearings
¡ Static load rating of Hybrid Ceramic Bearings
3) Impact strength of ceramic bearings
The basic static load rating of a steel bearing represents a load
that produces a localized permanent deformation in the rolling
element/raceway contact area, impeding smooth rotation.
However, ceramic materials, which are highly rigid, produce
little permanent deformation. Therefore, the theory of the basic
static load rating for steel bearings is not applicable to ceramic
bearings.
The theory of the static load rating for steel bearings is
applicable to Hybrid Ceramic Bearings because their outer and
inner rings are made of steel and accordingly any deformation is
permanent.
Table 1-5 shows the results of a test for which a high carbon
chromium bearing steel ball and ceramic ball were pressed
against a flat plate of high carbon chromium bearing steel and the
resulting permanent deformations (indentation depths) on the flat
plate and balls were measured.
To evaluate the impact strength of ceramic bearings, ceramic
balls were crushed by two methods: by a static load and an
impact load. The test results are shown in Fig. 1-9.
This figure shows that the impact strength of the ceramic
bearings is almost equal to the static load strength, which means
the bearings possess sufficient impact strength.
7
0.5
–
0.5
1.3
1.9
–
1.9
2.6
5.2
–
5.2
3.9
9.3
–
9.3
0.65
0.4
–
0.4
1.3
1.3
0.11
1.41
2.6
4.0
0.41
4.41
3.9
6.8
1.18
7.98
Ceramic Bearings and Special Steel Bearings
Ceramic balls
(9.525 mm in dia.)
80
Permanent deformation (average), mm Permanent deformation
(sum of averages), mm
Flat plate (bearing steel)
Ball
0.65
Load
99
60
Impact crushing load
40
Failure, %
Load
kN
1
● Static crushing test
Jig made of
bearing steel
● Table 1-5 Measurements of permanent deformation produced
on flat steel plate and balls
Ceramic ball
When exposed to continuous excessive loads, ceramic
materials may break down; however, before breakdown occurs,
the materials develop cracking.
Fig. 1-7 compares the load measurements at which ceramic
balls developed cracking with the basic static load ratings of steel
bearings.
As these results show, the loads at which cracks develop on
the Full Ceramic Bearing are far higher than that of the basic
static load rating of steel bearings. This means that the basic load
ratings specified in the ISO standard can be used as the
allowable static loads of the Full Ceramic Bearing.
Steel ball
¡ Static load rating of Full Ceramic Bearings
● Impact crushing test
Static crushing load
20
Weight 50 kg
10
5
Load cell
2
1
6
Crack
developing load
5
Load, kN
EXSEV Bearings: Composition and Selection
1
4
3
Basic static load rating
for steel bearing
(load that generates
a contact stress of 4 600 MPa)
2
These results indicate that ceramic balls do not suffer
permanent deformation and that the permanent deformation
produced on the flat steel plate by the ceramic balls is
approximately 1.2 times the sum of the deformation produced on
the flat plate by steel ball and the deformation that the steel ball
undergo.
Accordingly, the static load rating of Hybrid Ceramic Bearings
can be determined based on the permanent deformation of their
bearing steel rings. JTEKT uses the load equal to 85% of the
static load rating of steel bearings as the static load rating of the
Hybrid Ceramic Bearings.
0
1 2
5
10
20
30 40
100
Dropping
Crushing load, kN
Fig. 1-9 Comparison of static load and impact load that crush
ceramic balls
Jig made of
bearing steel
Ceramic balls
(9.525 mm in dia.)
1
Fig. 1-10
Load
Load cell
0
25
50
75
100
Load
meter
Ceramic ball crushing test method
Recorder
(Ball diameter Dw)2，mm2
Fig. 1-7 Crack developing loads for Full Ceramic Bearings
Ball
Flat plate
Fig. 1-8
7
Filter and
Noise
amplifier
suppressor
Acoustic emission
transducer
Filter and
amplifier
Counter
Crack generating load measurement system
8
CERAMIC BEARINGS AND
BEARINGS
1
When using ceramic bearings, it should be noted that ceramic
materials are largely different from steel materials in the
coefficient of linear expansion. Attention should therefore be paid
to fitting stresses and temperature rises.
The following are the results of evaluating the fitting of a
Ceramic Bearing on a stainless steel shaft.
Interference, L10
µm
Solid shaft
50
399
Hollow shaft
68
332
Inner ring
Shaft
Solid shaft
31
243
Hollow shaft
43
204
Bearing fitting
¡ Maximum stress produced by fitting
Table 1-6 shows the results of a static strength test conducted
on a ceramic ring fitted on a stainless steel shaft. Table 1-7
shows the results of a dynamic strength test (running test)
conducted on a ceramic ring fitted on a stainless steel shaft.
Based on the results of these tests, JTEKT makes it a rule for
the maximum stress produced by interference to be no greater
than 150 MPa when a ceramic inner ring is fitted on a stainless
steel shaft.
Consult JTEKT for applications requiring tighter fitting.
⎡ d ⎛ Di + d
⎞
d ⎛
⎢
⎜
+ mB ⎟ + ES ⎜
⎣ EB ⎝ Di2 – d2
⎠
⎝
2
Pm = 3deff
2
d + d20
d2 – d20
2
⎞ ⎤
–ms ⎟ ⎥
⎠ ⎦
–1
Hardness
HRC
Coefficient of
Modulus of
longitudinal elasticity linear expansion
GPa
✕10–6K–1
Load carrying
capability
Applications
High carbon chromium bearing steel
SUJ2
61
208
12.5
◎
Hybrid Ceramic Bearings
for insulation, etc.
Martensitic stainless steel
SUS440C
60
208
10.5
◎
Clean environments and
vacuum environments
Precipitation hardening stainless steel
SUS630
40
196
11.0
○
Corrosive environments
High speed tool steel
M50
61
207
10.6
◎
High temperature
environments
High speed tool steel
SKH4
64
207
12.0
◎
High temperature
environments
Non-magnetic stainless steel
43
200
18.0
○
Magnetic field
environments
Ceramic inner ring damaged by dynamic strength test
¡ Influence of temperature
During operation, bearing temperature exceeds the ambient
temperature. When a ceramic bearing is operated on a stainless
steel shaft or in a stainless steel housing, the interference with the
shaft increases due to the difference in linear expansion
coefficient while the interference with the housing decreases.
(When the outer ring is loose-fitted, the clearance increases.)
To determine the class of fit for a ceramic bearing, the maximum
temperature during operation should be assessed carefully.
: Maximum circumferential stress to interference
(MPa)
Pm
: Pressure of contact on fitting surface
(MPa)
d, Di
: Inner ring bore diameter and outside diameter
(mm)
3deff
: Effective interference of inner ring
(mm)
d0
: Bore diameter of hollow shaft
(mm)
: Shaft's modulus of longitudinal elasticity and Poisson's ratio
1400
Silicon nitride
(Si3N4)
1200
1000
70
(64)
800
60
2) Bearings for use in corrosive environments
For a highly corrosive environment where the SUS440C is not
enough to prevent corrosion, precipitation hardening stainless
steel (JIS SUS630) is used. However, SUS630 has a hardness of
40 HRC, which is inferior to other materials in load carrying
capability and rolling fatigue strength.
σ
ES, mS
The rings and rolling elements of conventional bearings are
made of high carbon chromium bearing steel (JIS SUJ2), which is
resistant to rolling fatigue. However, due to a relatively low
corrosion resistance, this steel requires application of
anticorrosive oil or other suitable rust preventive measure.
Applying anticorrosive oil to bearings is not favorable for use in
a clean and/or vacuum environment, due to the possibility of
contamination. Accordingly, EXSEV Bearings use martensitic
stainless steel (JIS SUS440C), which is highly corrosion resistant,
as a standard material for use in a clean environment.
Hardness, HV
Fig. 1-12
EB, mB : Bearing's modulus of longitudinal elasticity and Poisson's ratio (MPa)
9
◎: Superior, ○: Good
Characteristics of the typical special steels used for EXSEV Bearings
1) Bearings for use in clean and/or vacuum environments
■ The maximum stress generated on the inner ring due to the interference with the shaft can be
determined from the following equation:
Di2 + d2
Di2 – d2
1
Table 1-8 lists the typical special steels used to produce the bearing rings and rolling elements of EXSEV Bearings.
● Table 1-8
Max. allowable interference Max. allowable stress for ring
µm
MPa
Outer ring
σ = Pm ·
Special Steel Bearings
● Table 1-7 Typical results of dynamic strength test on ceramic
bearing shaft fitting
Housing
Fig. 1-11
Ring's fracture stress
MPa
1-2
50
SKH4
M50
40
SUJ2
SUS440C
30
SUS630
3) Bearings for use in high temperature environments
Fig. 1-13 shows the high temperature hardness of various
materials. SUS440C has a hardness of 55 HRC at 300˚C, which
means it can be used in a high temperature environment of up to
approximately 300˚C. In an environment heated in excess of
300˚C, high speed tool steel (JIS SKH4, AISI M50, etc.) should
be used.
20
0
200
400
600
800
Temperature, ˚C
Fig. 1-13
High temperature hardness of various bearing materials
(MPa)
10
Ceramic Bearings and Special Steel Bearings
● Table 1-6 Typical results of static strength test on ceramic
bearing shaft fitting
4) Fitting of ceramic bearings
Hardness, HRC
EXSEV Bearings: Composition and Selection
1
BEARINGS
1
2 Lubricants for
EXSEV Bearings: Composition and Selection
Bearing performance depends on lubrication; it is no
exaggeration to say that lubrication determines the
service life of bearings. Grease or a solid lubricant is
properly used to lubricate the EXSEV bearings.
Compared with solid lubricants, grease is superior for
the high speed performance, load carrying capability, and
service life of bearings. Therefore, it is recommended to
use grease as much as possible.
Grease cannot be used for some application in an
ultrahigh vacuum, high temperature, or clean
environment. In an application where oil evaporation
from grease is unacceptable, solid lubricants should be
used.
Bearings
1
As can be seen Fig. 2-1, oil A, which originally has the acetal
structure, apparently emits a great amount of oxide components,
such as CF2O+, C2F3O+ and C2F5O+, which are attributed to the
decomposition of the acetal structure. It emits a greater amount
of gas than other oils.
As the standard grease for the EXSEV Bearings, JTEKT uses
fluorinated grease containing oil B or PFPE, whose molecular
chains are not easily torn off.
Oil A
1 000
Ionic strength
1) High temperature, vacuum or clean environments
Fluorinated greases are known as useful for high temperature
applications. Its base oil is perfluoropolyether (PFPE) and its
thickener is polytetrafluoroethylene (PTFE).
Fluorinated grease has a low evaporation pressure, and can be
used in a vacuum environment of approximately 10–5 Pa at room
temperature. Another advantage of this grease is low particle
emissions, and is applicable in a clean environment. Owing to
these excellent characteristics, fluorinated grease is used as the
standard grease for the EXSEV Bearings.
Oil B
100
10
1
1 000
10
1
0 20 40 60 80 100 120 140 160 180 200
Molecular weight
Fig. 2-1
Differences in gas emissions from PFPE
Load adjustment mechanism
Exhaust system : Turbo molecular pump & rotary pump
(exhaust possible up to 10 –7 Pa)
Fig. 2-2
Molecular structure
Viscosity, 20°C
mm2/s
Mean molecular
weight
Vapor pressure, 20°C
Pa
CF3 – (OCF2CF2) p – (OCF2) q – OCF3
255
9 500
4 ✕ 10–10
B
F – (CF2CF2CF2O) n – CF2CF3
500
8 400
7 ✕ 10–9
2 700
11 000
4 ✕ 10–12
F – ⎛ CFCF2O⎞ – CF2CF3
11
● Table 2-2
Four ball type vacuum test equipment
A
C
Among layer lattice materials, molybdenum disulfide (MOS2) is
coated to the cage and bearing rings, or is used as an additive for
composite materials, while tungsten disulfide (WS2) is not used as
a coating material but used only as an additive for composite
materials.
These lubricants are superior to polymeric materials in heat
resistance and load carrying capability, and are used for high
temperature applications or applications where a large load
carrying capability is required.
Layer lattice materials should not be used in a clean
environment because they emit an excessive amount of particles.
⎜
⎜│
⎜
⎝ CF3
⎟
⎟
⎟
⎠ m
Ball
Cage
● Separator including tungsten disulfide
Ball
Soft metals
Separator
Fig. 2-4
Characteristics of major solid lubricants used for EXSEV Bearings
Solid lubricant
Tested PFPEs and their characteristics
Oil
Balls coated with silver ion plating
● Cage made from fluorocarbon resin
Polymeric materials are coated to the cage and/or bearing
rings. They are also used to make cages.
Polymeric materials are suitable for applications where
cleanliness is critical or the environment is corrosive. Because
they are relatively independent of ambient conditions, they are
suitable for applications where bearings are repeatedly exposed
to atmospheric air and a vacuum.
Strain
gauge
● Table 2-1
Fig. 2-3
3) Polymeric materials
External
motor
Mass spectrometer
In an environment where oil and grease cannot be used, a
solid lubricant is used to lubricate bearings.
Solid lubricants can roughly be classified into soft metals, layer
lattice materials, and polymeric materials.
Table 2-2 shows the characteristics of major solid lubricants
used for the EXSEV Bearings, along with the major applications
where the individual solid lubricants are used.
2) Layer lattice materials
Oil C
100
2) High vacuum environments
Fluorinated greases are classified according to whether the
base oil includes an acetal bond (-O-CF2-O-) and whether side
chains are included (Table 2-1).
Note that when a fluorinated grease is used in a vacuum, these
differences in molecular structure may cause the molecular
chains to be disconnected and decompose, resulting in a
difference in the amount of gas emissions in the vacuum.
For the PFPE of the three greases listed in Table 2-1, Fig. 2-1
shows the results of gas emissions evaluation, using four ball
type vacuum test equipment.
1 000
2
Soft metals, such as silver (Ag) and lead (Pb), are coated on
balls by the ion plating method. These lubricants are effective for
use in ultrahigh vacuum environments where gas emissions from
bearings should be avoided.
Silver coated components require careful handling because
silver is susceptible to oxidization and durability deteriorates
rapidly once oxidized. Lead is seldom used as a lubricant
because it is hostile to the environment.
10
Grease
Solid Lubricants
1) Soft metals
100
1
2-1
2-2
Lubricants for EXSEV Bearings
CERAMIC BEARINGS AND
Thermalstability, °C
Cage and separators
◎ : Superior, ○ : Good, △ : Acceptable
Coefficient of friction Load capacity Particle
Gas
MPa
emissions emissions
Vacuum
Atmospheric air
Vacuum
Atmospheric air
Silver (Ag)
–
600 or higher
–
Lead (Pb)
–
300 or higher 0.05 to 0.5
0.2 to 0.3
2 500 max.
△
◎
0.1 to 0.15 2 500 max.
△
◎
Molybdenum disulfide (MoS2)
Layer
Tungsten disulfide (WS2)
lattice
materials Graphite (C)
350
400 or higher 0.01 to 0.25 0.001 to 0.25 2 000 max.
△
○
425
400 or higher 0.05 to 0.28 0.01 to 0.2
2 500 max.
△
○
500
–
0.05 to 0.3
0.4 to 1.0
2 000 max.
△
○
Polymeric Polytetrafluoroethylene (PTFE)
materials Polyimide (PI)
260
200
0.04 to 0.2
0.04 to 0.2
1 000 max.
◎
△
200 or higher 0.05 to 0.6
0.05 to 0.6
1 000 max.
○
△
300
Applications
Ultrahigh vacuum
environments
Vacuum environments,
High temperature
environments
Clean, vacuum, and/or
corrosive environments
12
BEARINGS
3 How to Select
4) Service life of solid lubricants
¡ Soft metal materials
Bearings lubricated with a solid lubricant can provide stable
running performance as long as the lubricant is supplied
continuously. When the lubricant is used up, the metal
components become in contact with each other, rapidly
increasing running torque and reducing the service life of the
bearing. The service life of bearings is greatly influenced by the
operating conditions. As a consequence, it is not always possible
to accurately estimate the service life of bearings lubricated with
solid lubricant because of the variations in operating conditions.
The average service life of the EXSEV Bearing whose balls are
silver ion plated (MG Bearing) can be estimated using the
following equation:
When a solid lubricant is used to lubricate a bearing, the
bearing is generally used under a relatively light load, such as 5%
or less of the basic static load rating. Based on the results of
various experiments under the above mentioned operating
conditions, JTEKT provides the following experimental equation
to enable an estimation of the service life of a deep groove ball
bearing lubricated with a solid lubricant.
¡ Polymeric materials
The average service life of clean pro coated bearings can be
estimated by the following equation:
Cr ✕ 0.85 q
) ✕0.016667/n
Lav = b2 · (
Pr
Where,
Lav : Average life, h
b2 : Lubrication factor
b2 = 42
Cr : Basic dynamic load rating, N
Pr : Dynamic equivalent radial load, N
q : Exponential coefficient, q = 3
n : Rotational speed, min–1
Lvh = b1 · b2 · b3(
Where,
Lvh :
Cr :
Pr :
q :
n :
b1 :
b2
b3
Cr
q
) ✕16 667/n
13 ✕ Pr
90% reliability service life, h
Basic dynamic load rating, N
Dynamic equivalent radial load, N
Exponential coefficient, q = 1
Rotational speed, min–1 (10 ≤ n ≤ 10 000)
Speed factor
b1 = 1.5✕10–3 n + 1
: Lubrication factor
b2 = 1
: Ambient pressure/temperature factor
b3 = 1(at 10–3 Pa and room temperature)
3-1
1
Clean Environments
3
In a clean environment, bearings made of high carbon
chromium bearing steel applied with rust preventive oil cannot be
used. Accordingly, stainless steel bearings are used without
applying rust preventive oil. A low particle emission type lubricant
should be used for these bearings.
Fig. 3-1 shows an EXSEV Bearing selection chart on the basis
of the cleanliness class and temperature of the environment. In
this chart, each numerical value has a margin.
Bearings lubricated with a Clean Pro coating or fluorinated
grease are also useful in clean environments because they are
low in particle emissions.
Fluorinated grease is superior to solid lubricants in load
carrying capability and high speed operation. This grease can be
used in applications where a slight amount of scattering of
fluorinated oil is acceptable.
400
The amounts of particle emissions from bearings differ
depending on operating conditions such as temperature, load and
rotational speed. Please consult JTEKT for applications who's
operating conditions are near the bearing applicability divisions
specified in Fig. 3-1.
Table 3-1 compares the particle emissions of various lubricants
provided for major EXSEV Bearings.
For an unlubricated EXSEV Bearing, more than 3 million
particles are found for every 20 hours. When silver or molybdenum
disulfide is used as a lubricant, 10 000 or more particles are
emitted, indicating that neither is suitable for clean environments.
Bearings using a fluorine polymer are low in particle emissions
and suitable for use in clean environments.
300
High Temperature Clean Pro Bearing
200
Clean Pro Bearing
● Table 3-1
Clean Pro PRA Bearing
102
10
103
Cleanliness class
EXSEV Bearings suitable for clean environments
Particle emissions from major EXSEV Bearings
Bearing material composition
Bearing rings
DL Bearing
100
Fig. 3-1
Balls
Cage
SUS440C
SUS304
Silicon nitride
SUS304
SUS440C
Lubrication
Lubricated
component
Lubricant
─
(None)
Number of emitted particles during 20-hour test duration
2
SUS440C
Fluorocarbon resin
(FA)
4
10
1
6
10
10
8
10
3 641 252
10 348
SUS304
¡ Layer lattice materials
The average service life of the EXSEV Bearings whose cage is
coated with molybdenum disulfide (MO Bearings) can also be
estimated by the above equation, supposing that b2 equals to 6.
Bearings
23 218
Balls
Silver ion plating
Cage
Baking of molybdenum
disulfide
Cage
Baking of PTFE
42
Cage
Fluorine polymer
38
Whole component
Clean Pro coating
surfaces
434 452
7
SUS304
─
Fluorinated grease
11
● Test conditions
Bearing number: ML6012
(u6✕u12✕3mm)
Rotational speed: 200 min−1
Radial load: 2.9 N per two bearings
Particle size: 0.3 µm or greater
For the properties of the EXSEV Bearings shown in Fig. 3-1, refer to the pages listed below.
Fluorinated grease
DL Bearing ………………………………………………35
Polymeric materials
Clean Pro Bearing ………………………………………29
High Temperature Clean Pro Bearing …………………31
Clean Pro PRA Bearing …………………………………33
13
14
How to Select EXSEV Bearings
EXSEV Bearings: Composition and Selection
1
Ambient temp. ˚C
CERAMIC BEARINGS AND
CERAMIC BEARINGS AND
BEARINGS
1
¡ Bearing materials
Outer/inner rings and balls of the bearings for use in a vacuum
environment are usually made of martensitic stainless steel
(SUS440C). For the bearings requiring corrosion resistance,
precipitation hardening stainless steel (SUS630) is used. When
high temperature resistance is required, high speed tool steel
(SKH4, M50, etc.) can be used. For a special operating condition,
ceramic having excellent heat/corrosion resistance may be used.
400
1) When cleanliness is not critical:
Ambient temp. ˚C
¡ Lubricants
A bearing used in an ordinary vacuum chamber is repeatedly
exposed to atmospheric air and vacuum. There is no rolling bearing
lubricant that is effective for use under such a wide pressure range.
The lubricant should optimally be selected in consideration of
principal ambient pressure and temperature as well as required
cleanliness and corrosion resistance when necessary.
3-3
When bearings should be clean, solid lubricants such as soft
metal materials and layer lattice materials cannot be used
because of excessive particle emissions. In such a case, a
polymeric material or fluorinated grease is used.
Figs. 3-3 and 3-4 show the EXSEV Bearings applicable for
vacuum environments with cleanliness classes 100 and 10,
respectively.
300
Clean Pro Bearing
Clean Pro PRA
Bearing
100
Fig. 3-2 shows the EXSEV Bearings that are suitable for
vacuum applications that do not require cleanliness.
DL Bearing
400
1
10–2
10–6
10–8
Pressure, Pa
WS Bearing
300
Fig. 3-3
200
10–4
MO Bearing
Fig. 3-5 shows bearing materials for high temperature
applications.
SUS440C can withstand temperatures up to approximately
300˚C.
In the range from 300˚C to approximately 500˚C, High
Temperature Hybrid Ceramic Bearings, whose bearing rings are
made of highly heat resistant high speed tool steel (SKH4 or M50)
and rolling elements made of ceramic, should be used.
In a high temperature environment in excess of 500˚C, full
ceramic bearings should be used.
EXSEV Bearings applicable for cleanliness class 100
In a temperature range of up to approximately 200˚C,
fluorinated grease can be used. At temperatures over 200˚C, a
layer lattice material should be used.
Because all layer lattice materials emit a large amount of
particles, they are not suitable for applications where cleanliness
is required. Graphite cannot be used in a vacuum environment
because it does not serve as a lubricant in a vacuum.
In a high temperature environment over 500˚C, there is no
lubricant that can work perfectly. Unlubricated full ceramic
bearings are used for such a high temperature application.
Ceramic materials
100
10–2
10–4
10–6
10–8
Pressure, Pa
Fig. 3-2 EXSEV Bearings useful for vacuum applications where
cleanliness is not critical
When the ambient temperature is near normal room temperature
and vacuum is 10–5 Pa or less, fluorinated grease is used for
lubrication. However, since the fluorinated oil contained in the
grease gradually begins to evaporates, a solid lubricant should be
used in applications where oil scattering should not occur.
In an ultrahigh vacuum environment with pressure lower than
10–5 Pa, gas emissions from bearings may pose a problem. For
this pressure range, MG Bearings lubricated with silver, a soft
metal lubricant, should be used.
Ambient temp. ˚C
1
400
High Temperature
Hybrid Ceramic Bearing
WS Bearing
300
MO Bearing
PN Bearing
200
DL Bearing
100
Ambient temp. ˚C
High temperature
Clean Pro Bearing
200
SKH4
M50
Graphite
400
Clean Pro Bearing
WS2
300
100
Clean Pro PRA
Bearing
1
10–2
10–4
MOS2
10–6
10–8
SUS440C
200
Fluorinated grease
Pressure, Pa
Fig. 3-4
500
500
300
DL Bearing
Full Complement
Ceramic Ball Bearing
Fig. 3-6 EXSEV Bearing applicable for high temperature
environments
400
MG Bearing
PN Bearing
¡ Bearing materials
Fig. 3-6 shows the EXSEV Bearings useful for high temperature
applications.
The temperatures shown in the figure are approximate. When
the operating temperature of your application is near a
temperature division specified in this figure, consult JTEKT.
If a bearing is exposed to a high temperature in a clean or
vacuum environment, please refer to the sections entitled "Clean
Environments" or "Vacuum Environments".
¡ Lubricants
High temperature
Clean Pro Bearing
200
High Temperature Environments
100
EXSEV Bearings applicable for cleanliness class 10
Bearing materials
Lubricants
Fig. 3-5 Bearing materials and lubricants for high temperature
applications
For the properties of the individual EXSEV Bearings shown in the figures, refer to the applicable pages shown below:
Fluorinated grease
DL Bearing ………………………………………………35
Polymeric materials
Layer lattice materials
Clean Pro Bearing ………………………………………29
PN Bearing ………………………………………………37
High Temperature Clean Pro Bearing …………………31
WS Bearing ………………………………………………39
Clean Pro PRA Bearing …………………………………33
MO Bearing ………………………………………………41
Soft metal materials
MG Bearing ………………………………………………43
No lubrication
Full Complement Ceramic Ball Bearing ………………47
High Temperature Hybrid Ceramic Bearing …………45
15
16
3
How to Select EXSEV Bearings
2) When cleanliness is critical:
Vacuum Environments
Ambient temp. ˚C
3-2
Ambient temp. ˚C
EXSEV Bearings: Composition and Selection
1
CERAMIC BEARINGS AND
BEARINGS
1
Corrosive Environments
1) Corrosion resistance of special steels
2) Corrosion resistance of ceramic materials
Table 3-2 shows the corrosion resistance of the special steels
used for the EXSEV Bearings to major corrosive solutions.
In stainless steels, SUS630 is superior to SUS440C in
corrosion resistance. However, in such a highly corrosive
solution as an acid or alkaline solution, or if the solution must be
kept free from rust, these special steels cannot be used.
Table 3-3 shows the corrosion resistance of ceramic materials.
Silicon nitride, which is used as the standard material of the
ceramic bearings, is excellent in corrosion resistance. However,
it may develop corrosion in a highly corrosive chemical, a high
temperature, or other highly corrosive ambient condition.
There are two types of ceramic corrosion: One is the corrosion
of the sintering aid (Al2O3 – Y2O3), which is used to bake ceramic
materials. To avoid this type of corrosion, corrosion resistant
silicon nitride treated with a spinel sintering aid (MgAl2O4) should
be used. Fig. 3-7 shows the mass reduction and bending
strength deterioration of corrosion resistant silicon nitride dipped
in an acid or alkaline solution for a given period of time.
The other type of corrosion is the corrosion of the silicon nitride
itself. For use in a highly corrosive solution, bearings made of
zirconia (ZrO2) or silicon carbide (SiC) may be effective.
To select a ceramic bearing for use in a highly corrosive
environment, its corrosion resistance to the specific condition
should be carefully examined.
● Table 3-2
Corrosion resistance of special steels
Concentration
%
SUJ2
1
×
10
×
×
×
1
×
○
◎
10
×
△
○
Nitric acid
20
×
○
◎
Seawater
–
×
○
◎
Water
–
×
◎
◎
Solution
Hydrochloric
acid
Sulfuric acid
SUS440C SUS630
△
○
Temperature 25˚C
Corrosion rate ◎ : Up to 0.125 mm/year
○ : Over 0.125 to 0.5 mm/year
△ : Over 0.5 to 1.25 mm/year × : Over 1.25 mm/year
● Table 3-3
◎: Fully resistant ○: Almost resistant
△: Slightly susceptible ×: Susceptible
Corrosion resistance of ceramic materials
Ceramic materials
Corrosive solutions
Silicon nitride (standard) Corrosion resistant silicon nitride
Si3N4
Si3N4
Zirconia
ZrO2
Silicon Carbide
SiC
Hydrochloric acid
△
○
○
◎
Nitric acid
△
○
○
◎
Sulfuric acid
△
○
○
◎
Phosphoric acid
○
○
○
◎
Fluorine acid
△
△
×
◎
Sodium hydroxide
△
△
○
△
Potassium hydroxide
△
△
△
△
Sodium carbonate
△
△
△
△
Sodium nitrate
△
△
△
△
Water and saltwater
◎
◎
◎
◎
Note) The corrosive natures of individual solutions differ largely depending on the concentration and temperature. Note that mixing two or more chemicals may
increase the corrosivity.
0.2
0.1
35 % HCl, 80˚C, 100h
35 % KOH, 80˚C, 100h
Standard Corrosion
resistant
Standard Corrosion
resistant
3) Service life of corrosion resistant bearings
Table 3-4 lists the bearings suitable for applications requiring corrosion resistance, along with their major applications.
● Table 3-4
Typical corrosion resistant EXSEV Bearings
Bearing Materials
Applications
Page
Bearing Rings
Balls
SUS630
Silicon nitride
51
Corrosion Resistant Hybrid
Ceramic Bearing
In water, alkaline environment and
reactive gas
Ceramic Bearing
In a slightly acidic environment, alkaline
environment and reactive gas
Silicon nitride
Silicon nitride
53
Corrosion Resistant
Ceramic Bearing
In a strongly acidic environment, strongly
alkaline environment and reactive gas
Corrosion resistant
silicon nitride
Corrosion resistant
silicon nitride
55
High Corrosion Resistant
Ceramic Bearing
In a strongly acidic environment, strongly
alkaline environment and corrosive gas
Silicon carbide
Silicon carbide
57
When EXSEV Bearings are operated in a solution, the solution
serves as a lubricant. This means the solution is closely
associated with the service life of the bearings. Fig. 3-8 shows
the service life evaluation results for three types of EXSEV
Bearings under water.
The Ceramic Bearings terminate their service life due to the
flaking on the bearing ring or ball surfaces.
In case of the Hybrid Ceramic Bearings, ceramic balls do not
develop flaking or wear. Their service life ends due to wear
attributed to the minute corrosion of stainless steel bearing rings.
When bearings are used in a solution whose lubrication
performance is not enough, such as in water, it is important to
evaluate in advance the susceptibility of the bearings to corrosion
and the relationship between the bearing load and wear in the
solution.
SUS440C has a longer service life than SUS630; however, the
former steel is not suitable for use in water because it may rust
and cause contamination.
Ceramic Bearings may develop wear at an early stage of use
depending on the characteristics of the solution, temperature, and
load. Please contact JTEKT before using Ceramic Bearings in
solutions.
Corrosion Resistant Hybrid Ceramic Bearing
(Bearing rings: SUS630)
Hybrid Ceramic Bearing
(Bearing rings: SUS440C)
Ceramic Bearing
90
50
Service life rating
of steel bearings
10
Down to 3%
5
1
10
50
100
500
1 000
5 000 10 000
Service life, h
● Test conditions
Bearing number: 6206 or equivalent
Rotational speed: 1 500 min−1
Radial load:
Ceramic Bearing: 1 470 N
Corrosion Resistant Hybrid Ceramic Bearing: 196 N
Hybrid Ceramic Bearing: 196 N
Fig. 3-8 Comparison in underwater service life of EXSEV Bearings
30
20
10
0
0
Standard Corrosion
resistant
Fig. 3-7
17
40
35 % KOH, 80˚C, 100h
Bending strength
deterioration, %
35 % HCl, 80˚C, 100h
How to Select EXSEV Bearings
3
Failure, %
3-4
Mass reduction, %
EXSEV Bearings: Composition and Selection
1
Standard Corrosion
resistant
Anticorrosive performance of corrosion resistant silicon nitride
18
4
4-2
Bearings may be exposed to magnetic fields in some
applications, including equipment associated with super
conductivity, semiconductor production facilities and medical
examination facililies. If steel bearings are used for such
applications, the running torque may fluctuate or the magnetic
field may be disturbed . Non-magnetic bearings should be used
for such applications. As a non-magnetic material for such
bearings, beryllium copper has conventionally been used.
However the use of beryllium copper should be avoided since it
contains beryllium, a substance of environmental concern.
For such applications, JTEKT supplies Hybrid Ceramic Bearings,
whose rings are made of non-magnetic stainless steel and rolling
elements are made of a ceramic material, or the full ceramic bearings.
● Table 4-1
Insulating Bearings
A cause of bearing failure in motors or generators is electric
pitting. Electric pitting occurs when a surface in rolling contact is
locally molten due to sparks produced over the very thin
lubricating oil film on the surface when electricity passes through
the bearing in operation.
Electric pitting appears as a series of pits or a series of ridges
on the surface in rolling contact.
59
Ceramic Bearings
1.001 or lower
53
(Ref.) Beryllium copper
1.001 or lower
–––
Fig. 4-1 shows a rolling fatigue strength evaluation result for
various non-magnetic materials. As can be seen from the figure,
non-magnetic stainless steel is superior to beryllium copper in
rolling fatigue strength.
4
Silicon nitride
3
2
Hybrid Ceramic Bearings, whose rolling elements are made of
a ceramic material with a density lower than that of bearing steel,
are most suitable for high speed applications. This is because
reduced mass of rolling elements suppresses the centrifugal force
of the rolling elements, as well as slippage attributable to the
gyro-moment, when the bearings are in operation.
Thanks to their superior high speed performance, Hybrid Ceramic
Bearings are used in turbochargers and on machine tool spindles.
¡ Seizure limit at high speed
Fig. 4-5 shows the seizure limits of Hybrid Ceramic Bearings
and steel bearings. The limits were measured by gradually
reducing lubricating oil feed rate.
Compared with general purpose steel bearings, Hybrid
Ceramic Bearings consume smaller amount of lubricating oil
under the same speed condition, while they can run at a higher
speed under the same luburicating oil feed rate condition.
Steel bearing, running
Fig. 4-4 compares power losses between the Hybrid Ceramic
Bearings and steel bearings.
When compared to steel bearings, the Hybrid Ceramic
Bearings lose smaller power during high speed operation. The
power loss decreases with increasing rotational speed.
The Hybrid Ceramic Bearings also have superior antiseizure
characteristics, which means that they consume smaller amount of
lubrication oil and thereby reduce rolling resistance (power loss).
Page
Non-magnetic Hybrid Ceramic Bearings 1.01 or lower
4
¡ Power losses at high speed
Non-magnetic bearings and relative permeability
Relative
permeability
High Speed Bearings
4-3
Fig. 4-2 Electric pitting generated on general purpose bearings
(pits on the left and ridges on the right)
2
To avoid such pitting, a bypass is provided to ensure that no
electric current passes through the bearing. Another method is to
use an insulating bearing that can block electric current.
Since ceramic materials exhibit an excellent insulation
performance, Hybrid Ceramic Bearings consisting of ceramic
rolling elements can be used as insulating bearings.
Hybrid Ceramic Bearings prevent electric pitting, also reduce
bearing temperature rise, and lengthen grease service life. For
these reasons, Hybrid Ceramic Bearings assure long term
maintenance free operation and high speed equipment operation.
Steel bearings
1.5
Hybrid Ceramic Bearing, running
Hybrid Ceramic Bearing, seized
0.5
0.4
0.3
Steel bearing
seizure limit
0.2
Hybrid
Ceramic Bearing
seizure limit
1
0.1
Hybrid
Ceramic Bearings
0.5
Non-magnetic stainless steel
Steel bearing, seized
Lubrication oil feed rate, L/min.
Non-magnetic Bearings
1
Power loss, kW
4-1
Bearings with Special Characteristics
Load, kN
0
40
60
80
100
120
Rotational speed,×103 min–1
1
Beryllium copper
0
100
200
300
400
500
● Test conditions
Rotational speed
Temperature
20
40
60
80
100
Fig. 4-5 Comparison between Hybrid Ceramic Bearings and
steel bearings in seizure limit
Rotational speed, ×103 min–1
Time, h
Hybrid Ceramic Bearings
Steel bearings
High speed tool steel (M50)
Ceramic
High speed tool steel
Material
(Si3N4)
(M50)
Dia.
6.35 mm
Number of balls
9
Cage
Polyimide resin
Bearing rings
–1
1 200 min
Room temp.
Balls
EXSEV Bearings: Composition and Selection
1
BEARINGS
Lubricant
Condition
Axial load
Rotational speed (max.)
Lubricating oil
Ambient temperature
Ceramic balls
（9.525 mm）
Test specimen
Load
Fig. 4-1 Comparison of non-magnetic materials in rolling fatigue strength
19
Fig. 4-3
Insulating bearings (Hybrid Ceramic Bearings)
Specification
200 N
100 000 min−1
AeroShell Turbine Oil 500
Room temp.
Fig. 4-4 Comparison in power loss between Hybrid Ceramic
Bearings and steel bearings
20
EXSEV Bearings with Special Characteristics
CERAMIC BEARINGS AND
2
Bearings and
Other
Products
For the use of bearings in an extreme, special environment, identifying the best combination of bearing materials and
lubricants according to specific conditions is critical.
This chapter describes the component compositions and features of major EXSEV Bearing varieties.
For other EXSEV Bearings suited to more specialized applications, please consult JTEKT.
1 Ceramic Bearings and
Bearings:
Table of Specifications
2 Ceramic Bearings and
Table of Characteristics
3 Radial Ball Bearings
.......................................................................................................
23
Bearings:
...................................................................................................
25
3-1
Clean Pro Bearing ...................................................................................................................... 29
3-2
High Temperature Clean Pro Bearing .......................................................... 31
3-3
Clean Pro PRA Bearing ..................................................................................................... 33
3-4
DL Bearing ............................................................................................................................................. 35
3-5
PN Bearing ............................................................................................................................................ 37
3-6
WS Bearing........................................................................................................................................... 39
3-7
MO Bearing........................................................................................................................................... 41
3-8
MG Bearing........................................................................................................................................... 43
3-9
High Temperature Hybrid Ceramic Bearing......................................... 45
3 -10
Full Complement Ceramic Ball Bearing ..................................................... 47
3 -11
SK Bearing............................................................................................................................................. 49
3 -12
Corrosion Resistant Hybrid Ceramic Bearing ................................... 51
3 -13
Ceramic Bearing ........................................................................................................................... 53
3 -14
Corrosion Resistant Ceramic Bearing .......................................................... 55
3 -15
High Corrosion Resistant Ceramic Bearing ......................................... 57
3 -16
Non-magnetic Hybrid Ceramic Bearing ...................................................... 59
3 -17
Hybrid Ceramic Bearing..................................................................................................... 61
4 K Series Full Complement Hybrid Ceramic Ball Bearing
5 Linear Motion Bearings
......
63
5-1
Linear Motion Ball Bearings for Extreme Special Environments ........ 65
5-2
Linear Way Bearing Units for Use in Extreme Special Environments ..... 71
5-3
Cross Roller Way Bearing Units in Extreme Special Environments .......... 79
6 High Ability Angular Contact Ball Bearings
7 Ceramic Balls
8 Accuracy and Internal Clearance of Ceramic
Bearings and
.......................
85
.............................................................................................................................................
88
Bearings
8-1
Accuracy of Radial Ball Bearings......................................................................... 89
8-2
Clearance of Radial Ball Bearings ..................................................................... 90
8-3
Accuracy and Internal Clearance of K Series Full
Complement Hybrid Ceramic Ball Bearings ........................................ 90
2
BEARINGS
1 Ceramic Bearings and
Bearings:
2
Products
Bearing No.
SK Bearing
1
Clean Pro
Bearing
High Temperature
Clean Pro Bearing
Clean Pro
PRA Bearing
DL Bearing
p. 49
p. 29
p. 31
p. 33
p. 35
p. 37
p. 41
p. 39
Prefix
SK
SE
SE
SE
SV
SE
SE
Suffix
ST
STPR
STPRB
STPRA
ST
ST
Cage code
YS
YS
YS
YS
YS
PN
Page
PN Bearing
MO Bearing
WS Bearing
MG Bearing
Full Complement
Ceramic Ball Bearing
Corrosion Resistant
Hybrid Ceramic Bearing
Ceramic Bearing
(angular contact ball bearing)
Corrosion Resistant
Ceramic Bearing
High Corrosion Resistance
Ceramic Bearing
High Temperature Hybrid
Ceramic Bearing
Non-magnetic Hybrid
Ceramic Bearing
Hybrid Ceramic
Bearing
K Series Full Complement
Hybrid Ceramic Ball Bearing
p. 43
p. 47
p. 51
p. 53
p. 55
p. 57
p. 45
p. 59
p. 61
p. 63
SE
SE
NC
3NC
NC
NCT
NCZ
3NC
3NC
3NC
3NC
STMSA7
ST
STMG3
V
MD4
(None)
(None)
(None)
HT4
YH4
(None)
VST-1
YS
WS
YS
(No cage)
FA
FA
FA
FA
GF
FA
FG
(No cage)
Outer ring
Martensitic stainless steel
Silicon nitride
ceramic
(standard)
Precipitation
hardening
stainless steel
Silicon nitride
ceramic
(standard)
Silicon nitride
ceramic
(corrosion resistant)
Silicon carbide
ceramic
High speed tool
steel
Non-magnetic
stainless steel
High carbon
chromium
bearing steel
Martensitic
stainless steel
Inner ring
Martensitic stainless steel
Silicon nitride
ceramic
(standard)
Precipitation
hardening
stainless steel
Silicon nitride
ceramic
(standard)
Silicon nitride
ceramic
(corrosion resistant)
Silicon carbide
ceramic
High speed tool
steel
Non-magnetic
stainless steel
High carbon
chromium
bearing steel
Martensitic
stainless steel
Rolling
elements
Martensitic stainless steel
Silicon nitride
ceramic
(corrosion resistant)
Silicon carbide
ceramic
Silicon nitride ceramic (standard)
Silicon nitride ceramic (standard)
(separator)
Cage or
separator
Austenitic
stainless steel
Composite
material
including
tungsten
disulfide
(separators)
Austenitic
stainless steel
Clean pro
coating
High temperature
clean pro coating
Clean pro
PRA coating
KHD grease
Molybdenum
disulfide, etc.
Molybdenum
disulfide
Tungsten
disulfide
Raceways and balls
Austenitic
stainless steel
Fluorocarbon
resin
(None)
Graphite
Cage
Separators
Reinforced
polyamide resin
Martensitic
stainless steel
Austenitic
stainless steel
(None)
Grease or oil
KDL grease
Fluorocarbon
polymer
(None)
Cage
Balls
Clean environments
Clean
environments
Vacuum
environments
Clean environments
Vacuum environments
Vacuum environments
Corrosive
environments
Applicable
environments
Graphite
Fluorocarbon resin
Fluorocarbon polymer
Silver
KDL grease
Entire surface
of all
components
(None)
(None)
Austenitic stainless steel
Lubricant
Component
coated with or
including
lubricant
PEEK resin
Austenitic stainless steel
Shield
Lubrication
EXSEV Bearings and Other EXSEV Products
Table of Specifications
Clean
environments
Vacuum
environments
Corrosive environments
High temperature
environments
High temperature environments
High temperature
environments
Magnetic field
environments
High temperature
environments
Magnetic field environments
Electric field environments
Magnetic field
environments
Electric field environments
High speed
applications
23
24
Ceramic Bearings and EXSEV Bearings: Table of Specifications
CERAMIC BEARINGS AND
CERAMIC BEARINGS AND
2
BEARINGS
2 Ceramic Bearings and
Bearings:
2
Table of Characteristics (1)
Ceramic Bearings and EXSEV Bearings: Table of Characteristics (1)
EXSEV Bearings and Other EXSEV Products
2
Applicable Environments
Major Uses
Products
dn value (1)
Max. (min–1)
DL Bearing
< 40000
–
Clean Pro Bearing
< 10000
1000
Clean Pro PRA Bearing
< 10000
< 300
< 350
< 400
< 500
< 800
10–5
10–10
10
100
Bearing Number (3)
(Cage Code)
1000
Low
SE□□□□ZZSTPR
（YS）
1000
●
SE□□□□ZZSTPRA
（YS）
< 10000
1000
●
SE□□□□ZZSTPRB
（YS）
Corrosion Resistant Hybrid
Ceramic Bearing
< 10000
1000
●
3NC□□□□ZZMD4
（FA）
Non-magnetic Hybrid
Ceramic Bearing
< 10000
1000
●
3NC□□□□YH4
（FA）
Ceramic Bearing
< 10000
1000
●
High
NC□□□□
（FA）
Corrosion Resistant Hybrid
Ceramic Bearing
< 10000
1000
●
Low
3NC□□□□ZZMD4
（FA）
< 10000
1000
●
NC□□□□
（FA）
Ceramic Bearing
< 10000
1000
●
NCT□□□□
（FA）
High Corrosion Resistant
Ceramic Bearing
< 10000
1000
●
High
NCZ□□□□
（FA）
< 10000
1000
SE□□□□ZZSTPRB
（YS）
3NC□□□□YH4
（FA）
Non-magnetic Hybrid
Magnetic field Ceramic Bearing
●
●
< 10000
1000
●
Low
Ceramic Bearing
< 10000
1000
●
High
NC□□□□
（FA）
Corrosion Resistant Hybrid
Ceramic Bearing
< 10000
1000
●
Low
3NC□□□□ZZMD4
（FA）
< 10000
1000
●
3NC□□□□YH4
（FA）
Ceramic Bearing
< 10000
1000
●
High
NC□□□□
（FA）
DL Bearing
< 40000
–
Low
SV□□□□ZZST
（YS）
PN Bearing
< 10000
1000
SE□□□□ZZST
（PN）
Clean Pro Bearing
< 10000
1000
SE□□□□ZZSTPR
（YS）
MG Bearing
< 10000
1000
SE□□□□ZZSTMG3
（YS）
MO Bearing
< 10000
1000
SE□□□□ZZSTMSA7
（YS）
Clean Pro PRA Bearing
< 10000
1000
●
SE□□□□ZZSTPRA
（YS）
High Temperature
Clean Pro Bearing
< 10000
1000
●
SE□□□□ZZSTPRB
（YS）
WS Bearing
< 4000
500
SE□□□□ZZST
（WS）
Corrosion Resistant Hybrid
Ceramic Bearing
< 10000
1000
●
3NC□□□□ZZMD4
（FA）
Non-magnetic Hybrid
Ceramic Bearing
< 10000
1000
●
3NC□□□□YH4
（FA）
Ceramic Bearing
< 10000
1000
●
NC□□□□
（FA）
Corrosion Resistant Ceramic
Bearing
< 10000
1000
●
NCT□□□□
（FA）
NCZ□□□□
（FA）
Electric field Non-magnetic Hybrid
environment Ceramic Bearing
High Corrosion Resistance
Ceramic Bearing
< 10000
(1) dn value: Bearing bore diameter (mm) ✕ Rotational speed (min )
–1
25
< 260
Price
●
High temperature High Temperature
environment Clean Pro Bearing
Vacuum environment
< 200
Atmospheric
air
（YS）
Ceramic Bearing
Corrosive
environment Corrosion Resistant
environment
< 120
Cleanliness (class) (2)
Vacuum (Pa)
Operating Temp. (˚C)
SV□□□□ZZST
Vacuum
High Temperature
environment Clean Pro Bearing
Clean
environment
Limiting Speeds
1000
●
●
●
High
(2) The cleanliness classes may vary depending on operating conditions.
(3) The four blank boxes represent the basic number of the bearing. A basic number consists of three or four alphanumeric characters. A bearing
number may be used as a convenience in the case of any queries to JTEKT.
26
Ceramic Bearings and
Table of Characteristics (2)
2
EXSEV Bearings and Other EXSEV Products
BEARINGS
Bearings:
2
2
Ceramic Bearings and EXSEV Bearings: Table of Characteristics (2)
CERAMIC BEARINGS AND
Applicable Environments
Major Uses
Products
Limiting Speeds
dn value (1)
SK Bearing
Corrosive environment
High temperature
environment
Magnetic field
environment
< 200
< 260
< 300
< 350
< 400
< 500
< 800
10–5
10–10
10
100
Price
Bearing Number (3)
(Cage Code)
1000
Equal to the dn value
of normal bearings
Low
SK□□□□ZZST
（YS）
●
3NC□□□□ZZMD4
（FA）
●
NC□□□□
（FA）
NC□□□□V
（─）
NCT□□□□
（FA）
High
NCZ□□□□
（FA）
Low
SE□□□□ZZST
（PN）
1000
SE□□□□ZZSTMG3
（YS）
< 10000
1000
SE□□□□ZZSTMSA7
（YS）
< 10000
1000
SE□□□□ZZSTPRB
（YS）
WS Bearing
< 4000
500
SE□□□□ZZST
（WS）
High Temperature Hybrid
Ceramic Bearing
< 4000
500
3NC□□□□HT4
（GF）
Full Complement Ceramic
Ball Bearing
< 4000
500
High
NC□□□□V
（─）
Non-magnetic Hybrid
Ceramic Bearing
< 10000
1000
●
Low
3NC□□□□YH4
（FA）
Ceramic Bearing
< 10000
1000
●
NC□□□□
（FA）
Full Complement
Ceramic Ball Bearing
< 4000
500
NC□□□□V
（─）
Corrosion Resistant
Ceramic Bearing
< 10000
1000
●
NCT□□□□
（FA）
< 10000
1000
●
High
NCZ□□□□
（FA）
Low
3NC□□□□ZZ
（FG）
< 10000
1000
Ceramic Bearing
< 10000
1000
Full Complement Ceramic
Ball Bearing
< 4000
500
Corrosion Resistant Ceramic
Bearing
< 10000
1000
●
High Corrosion Resistance
Ceramic Bearing
< 10000
1000
●
PN Bearing
< 10000
1000
MG Bearing
< 10000
MO Bearing
High Temperature
Clean Pro Bearing
Hybrid Ceramic Bearing
●
No less than 1.2 times
that of steel bearings
Corrosion Resistant Hybrid
Ceramic Bearing
< 10000
1000
●
3NC□□□□ZZMD4
（FA）
Non-magnetic Hybrid
Ceramic Bearing
< 10000
1000
●
3NC□□□□YH4
（FA）
Ceramic Bearing
< 10000
1000
●
NC□□□□
（FA）
Full Complement Ceramic
Ball Bearing
< 4000
500
NC□□□□V
（─）
Corrosion Resistant Ceramic
Bearing
< 10000
1000
●
NCT□□□□
（FA）
< 10000
1000
●
NCZ□□□□
（FA）
3NC□□□□ZZ
（FG）
High Corrosion Resistance
Ceramic Bearing
High speed application Hybrid Ceramic Bearing
No less than 1.2 times
that of steel bearings
(1) dn value: Bearing bore diameter (mm) ✕ Rotational speed (min )
–1
27
< 120
Atmospheric
air
Corrosion Resistant Hybrid
Ceramic Bearing
High Corrosion Resistance
Ceramic Bearing
Electric field
environment
Max. (min–1)
Cleanliness (class) (2)
Vacuum (Pa)
Operating Temp. (˚C)
High
(2) The cleanliness classes may vary depending on operating conditions.
(3) The four blank boxes represent the basic number of the bearing. A basic number consists of three or four alphanumeric characters. A bearing
number may be used as a convenience in the case of any queries to JTEKT.
28
CERAMIC BEARINGS AND
3 Radial Ball Bearings
2
Clean Pro Bearing
Performance
This bearing is lubricated with a fluoropolymer coating over the entire surface of all bearing
components.
● Suitable for use in clean environments due to low particle emissions.
Vacuum
Electric field
High speed
High temperature
200
100
0
-100
1
10
102
103
104
300
104
200
103
(Particles 0.3 µm or greater in diameter)
Gas emission characteristics
10 – 2
Temperature: Room temp.
Count of particles
Magnetic field
Ambient temperature, °C
Clean
Corrosive
● Stable performance up to 200°C in a vacuum.
Comparison of particle emissions
Applicable Environments
300
100
0
PTFE coated bearing
102
10
Clean Pro Bearing
-100
Cleanliness, class
105
1
Radial Ball Bearings
3
Ambient pressure, Pa
3-1
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
BEARINGS
1
0
10–5
100
10 – 4
10 – 5
200
Clean Pro Bearing
10 – 3
Background pressure, Pa
0
Time, h
Ambient pressure, Pa
100
200
300
Ambient temperature, ˚C
400
Dimensions Table
Boundary dimensions
mm
Product Specifications
Bearing No.
B
Martensitic stainless steel
d
12.4
55
1 000
12.2
60
1 000
1.05
12.3
80
1 000
1.05
12.3
80
1 000
1.35
12.4
100
1 000
1.35
12.4
100
1 000
1.40
12.8
100
1 000
1.40
12.8
100
1 000
1.95
12.4
135
970
1.40
12.8
100
1 000
1.95
12.3
135
1 000
2.40
13.2
155
860
2.40
13.2
155
830
6.80
3.05
12.3
205
770
5.60
2.85
13.9
170
660
SE6202ZZSTPRC3 YS
7.65
3.75
13.2
230
610
SE6003ZZSTPRC3 YS
6.00
3.25
14.4
180
580
0.6
SE6203ZZSTPRC3 YS
9.55
4.80
13.2
285
530
0.6
SE6004ZZSTPRC3 YS
9.40
5.05
13.9
280
500
14
1
SE6204ZZSTPRC3 YS
12.8
6.65
13.2
385
450
12
0.6
SE6005ZZSTPRC3 YS
10.1
5.85
14.5
305
400
52
15
1
SE6205ZZSTPRC3 YS
14.0
7.85
13.9
420
360
55
13
1
SE6006ZZSTPRC3 YS
13.2
8.25
14.7
395
330
62
16
1
SE6206ZZSTPRC3 YS
19.5
11.3
13.9
585
300
62
14
1
SE6007ZZSTPRC3 YS
15.9
10.3
14.9
475
280
72
17
1.1
SE6207ZZSTPRC3 YS
25.7
15.4
13.9
770
250
68
15
1
SE6008ZZSTPRC3 YS
16.7
11.5
15.2
500
250
18
1.1
SE6208ZZSTPRC3 YS
29.1
17.8
14.0
875
220
0.3
SE625-5ZZSTPRC3 YS
1.75
0.3
SE606ZZSTPRC3 YS
1.95
19
6
0.3
SE626ZZSTPRC3 YS
2.60
19
6
0.3
SE607ZZSTPRC3 YS
2.60
22
7
0.3
SE627ZZSTPRC3 YS
3.30
22
7
0.3
SE608ZZSTPRC3 YS
3.30
24
8
0.3
SE628ZZSTPRC3 YS
3.35
24
7
0.3
SE609ZZSTPRC3 YS
3.35
26
8
0.6
SE629ZZSTPRC3 YS
4.55
22.225
7.142
0.5
SEEE3SZZSTPRC3 YS
3.35
26
8
0.3
SE6000ZZSTPRC3 YS
4.55
30
9
0.6
SE6200ZZSTPRC3 YS
5.10
12
28
8
0.3
SE6001ZZSTPRC3 YS
5.10
32
10
0.6
SE6201ZZSTPRC3 YS
15
32
9
0.3
SE6002ZZSTPRC3 YS
35
11
0.6
Y
17
35
10
0.3
2.30
1.99
1.71
40
12
20
42
12
1.55
1.45
1.31
47
25
47
1.15
1.04
1.00
30
35
40
80
8
9.525
10
0.172
0.345
0.689
0.19
0.22
0.26
1.03
1.38
2.07
0.28
0.30
0.34
3.45
5.17
6.89
0.38
0.42
0.44
X
1
Fa
── ＞
Fr
Y
0
X
0.56
e
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Available from stock
29
0.67
0.74
5
6
P0r = Fr
■ Vacuum systems
1 000
17
When P0r is smaller than Fr .
■ Semiconductor manufacturing systems ■ LCD manufacturing systems
■ Exposing systems ■ Sputtering systems ■ Vacuum motors
1 000
40
16
P0r = 0.6Fr + 0.5Fa
Applications
40
1.30
(X and Y are as shown below.)
Clean pro coating
12.3
12.3
1.30
SE605ZZSTPRC3 YS
Static equivalent load
Solid lubricant
0.49
0.49
SE624ZZSTPRC3 YS
Pr = XFr + YFa
ZZSTPR YS
1 000
0.2
Dynamic equivalent load
Basic bearing number
min–1
30
0.2
9
SE
N
5
Shield
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
f0
12.4
5
6
e
0.36
14
φd
Fa
── ≦
Fr
0.97
13
5
Austenitic stainless steel
e
C0r
SE604ZZSTPRC3 YS
7
f0Fa
────
C0r
Cr
0.2
r
φD
r
(min.)
4
Outer ring Inner ring Ball
Bearing Numbering System
B
r
4
Cage
D
Basic load ratings 1)
Factor Permissible Limiting
kN
radial load speed
12
Note 1) The basic load ratings are those of normal bearing (used to calculate lubrication life).
The permissible radial loads can be regarded as the maximum loads applicable to individual bearings.
30
CERAMIC BEARINGS AND
BEARINGS
2
High Temperature Clean Pro Bearing
Performance
This bearing has a fluoropolymer coating on its rolling surface as the lubricant.
● Comparable to the Clean Pro Bearing in
low particle emissions.
Applicable Environments
Vacuum
Electric field
High speed
High temperature
Corrosive
200
100
0
-100
1
10
102
103
Cleanliness, class
Temperature:
Room temp.
200
100
0
-100
104
10
260
105
1
10–5
10–2
Clean Pro Bearing
103
102
High Temperature Clean Pro Bearing
10
1
0
Ambient pressure, Pa
Gas emission characteristics
(Particles 0.3 µm or greater in diameter)
4
Count of particles
Magnetic field
● Compatible with temperatures of up to
260˚C in a vacuum.
Comparison of particle emissions
300
Ambient temperature, °C
Clean
300
260
50
100
High Temperature Clean Pro Bearing
10–3
Clean Pro Bearing
10–4
10–5
150
Background pressure, Pa
0
Time, h
100
200
300
Ambient temperature, ˚C
Boundary dimensions
mm
Bearing No.
B
Martensitic stainless steel
d
4
r
5
φd
φD
6
Austenitic stainless steel
7
Cage
Shield
8
9
Dynamic equivalent load
Static equivalent load
Solid lubricant
High temperature clean pro coating
X
0.172
0.345
0.689
0.19
0.22
0.26
1.03
1.38
2.07
0.28
0.30
0.34
3.45
5.17
6.89
0.38
0.42
0.44
Fa
── ＞
Fr
e
Y
X
e
2.30
1.99
1.71
1
0
0.56
1.55
1.45
1.31
1.15
1.04
1.00
Available from stock
■ Semiconductor manufacturing systems ■ LCD manufacturing systems
■ Vacuum systems ■ Sputtering systems
31
■ Conveyer systems
0.2
SE624ZZSTPRBC3 YS
40
1 000
5
0.2
SE605ZZSTPRBC3 YS
40
1 000
16
5
0.3
SE625-5ZZSTPRBC3 YS
55
1 000
17
6
0.3
SE606ZZSTPRBC3 YS
60
1 000
19
6
0.3
SE626ZZSTPRBC3 YS
80
1 000
19
6
0.3
SE607ZZSTPRBC3 YS
80
1 000
22
7
0.3
SE627ZZSTPRBC3 YS
100
1 000
22
7
0.3
SE608ZZSTPRBC3 YS
100
1 000
24
8
0.3
SE628ZZSTPRBC3 YS
100
1 000
24
7
0.3
SE609ZZSTPRBC3 YS
100
1 000
SE629ZZSTPRBC3 YS
135
970
SEEE3SZZSTPRBC3 YS
100
1 000
26
8
0.3
SE6000ZZSTPRBC3 YS
135
1 000
30
9
0.6
SE6200ZZSTPRBC3 YS
155
860
28
8
0.3
SE6001ZZSTPRBC3 YS
155
830
32
10
0.6
SE6201ZZSTPRBC3 YS
205
770
15
32
9
0.3
SE6002ZZSTPRBC3 YS
170
660
35
11
0.6
SE6202ZZSTPRBC3 YS
230
610
17
35
10
0.3
SE6003ZZSTPRBC3 YS
180
580
40
12
0.6
SE6203ZZSTPRBC3 YS
285
530
42
12
0.6
SE6004ZZSTPRBC3 YS
280
500
47
14
1
SE6204ZZSTPRBC3 YS
385
450
47
12
0.6
SE6005ZZSTPRBC3 YS
305
400
52
15
1
SE6205ZZSTPRBC3 YS
420
360
55
13
1
SE6006ZZSTPRBC3 YS
395
330
62
16
1
SE6206ZZSTPRBC3 YS
585
300
62
14
1
SE6007ZZSTPRBC3 YS
475
280
72
17
1.1
SE6207ZZSTPRBC3 YS
770
250
68
15
1
SE6008ZZSTPRBC3 YS
500
250
80
18
1.1
SE6208ZZSTPRBC3 YS
875
220
Y
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Applications
5
14
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
1 000
0.5
12
e
13
30
0.6
10
Fa
── ≦
Fr
min–1
SE604ZZSTPRBC3 YS
8
When P0r is smaller than Fr .
f0Fa
────
C0r
N
0.2
7.142
P0r = 0.6Fr + 0.5Fa
P0r = Fr
r
(min.)
4
9.525 22.225
(X and Y are as shown below.)
ZZSTPRB YS
B
Permissible Limiting
radial load speed
12
26
Pr = XFr + YFa
Bearing Numbering System
D
r
Outer ring Inner ring Ball
SE
400
Dimensions Table
Product Specifications
Basic bearing number
Radial Ball Bearings
3
Ambient pressure, Pa
3-2
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
20
25
30
35
40
Note) Bearings with a radial internal clearance of C4 are also available.
32
CERAMIC BEARINGS AND
BEARINGS
2
Clean Pro PRA Bearing
Performance
This bearing has a fluoropolymer gel coating on its rolling surfaces as the lubricant.
● Superior to the Clean Pro Bearing in service life
under temperatures of no higher than 120˚C.
Applicable Environments
Vacuum
Electric field
High speed
High temperature
Corrosive
200
120
100
0
-30
-100
1
10
102
103
104
300
104
200
103
120
100
0
-30
-100
Cleanliness, class
(Particles 0.3 µm or greater in diameter)
Gas emission characteristics
10–2
Temperature: Room temp.
Count of particles
Magnetic field
Ambient temperature, °C
Clean
Clean Pro Bearing
102
10
Clean Pro PRA Bearing
105
1
1
0
10–5
200
400
Ambient pressure, Pa
600
800
10–4
Background pressure, Pa
0
100
200
300
400
Ambient temperature, ˚C
Bearing No.
B
d
r
4
r
5
φd
φD
6
Austenitic stainless steel
Cage
7
Shield
8
9
Dynamic equivalent load
Pr = XFr + YFa
ZZSTPRA YS
Clean pro PRA coating
Fa
── ≦
Fr
Fa
── ＞
Fr
e
e
■ Film manufacturing systems
40
1 000
SE605ZZSTPRAC3 YS
40
1 000
16
5
0.3
SE625-5ZZSTPRAC3 YS
55
1 000
17
6
0.3
SE606ZZSTPRAC3 YS
60
1 000
19
6
0.3
SE626ZZSTPRAC3 YS
80
1 000
19
6
0.3
SE607ZZSTPRAC3 YS
80
1 000
22
7
0.3
SE627ZZSTPRAC3 YS
100
1 000
22
7
0.3
SE608ZZSTPRAC3 YS
100
1 000
24
8
0.3
SE628ZZSTPRAC3 YS
100
1 000
24
7
0.3
SE609ZZSTPRAC3 YS
100
1 000
970
1 000
26
8
0.3
SE6000ZZSTPRAC3 YS
135
1 000
30
9
0.6
SE6200ZZSTPRAC3 YS
155
860
12
28
8
0.3
SE6001ZZSTPRAC3 YS
155
830
32
10
0.6
SE6201ZZSTPRAC3 YS
205
770
15
32
9
0.3
SE6002ZZSTPRAC3 YS
170
660
35
11
0.6
SE6202ZZSTPRAC3 YS
230
610
35
10
0.3
SE6003ZZSTPRAC3 YS
180
580
40
12
0.6
SE6203ZZSTPRAC3 YS
285
530
42
12
0.6
SE6004ZZSTPRAC3 YS
280
500
47
14
1
SE6204ZZSTPRAC3 YS
385
450
47
12
0.6
SE6005ZZSTPRAC3 YS
305
400
52
15
1
SE6205ZZSTPRAC3 YS
420
360
55
13
1
SE6006ZZSTPRAC3 YS
395
330
62
16
1
SE6206ZZSTPRAC3 YS
585
300
62
14
1
SE6007ZZSTPRAC3 YS
475
280
72
17
1.1
SE6207ZZSTPRAC3 YS
770
250
68
15
1
SE6008ZZSTPRAC3 YS
500
250
80
18
1.1
SE6208ZZSTPRAC3 YS
875
220
17
1.03
1.38
2.07
0.28
0.30
0.34
1.55
1.45
1.31
20
3.45
5.17
6.89
0.38
0.42
0.44
1.15
1.04
1.00
25
0.56
Y
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
■ LCD manufacturing systems
■ Vacuum systems
SE624ZZSTPRAC3 YS
0.2
135
2.30
1.99
1.71
X
Available from stock
■ Semiconductor manufacturing systems
■ Exposing systems ■ Vacuum motors
0.2
5
100
30
Applications
5
14
SEEE3SZZSTPRAC3 YS
0.19
0.22
0.26
0
13
35
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
1 000
SE629ZZSTPRAC3 YS
0.172
0.345
0.689
1
30
0.5
e
Y
min–1
SE604ZZSTPRAC3 YS
0.6
f0Fa
────
C0r
X
N
0.2
8
When P0r is smaller than Fr .
P0r = Fr
r
(min.)
7.142
10
P0r = 0.6Fr + 0.5Fa
B
Permissible Limiting
radial load speed
4
12
9.525 22.225
Static equivalent load
Bearing Numbering System
D
26
(X and Y are as shown below.)
33
Clean Pro Bearing
Boundary dimensions
mm
Outer ring Inner ring Ball
Solid lubricant
10
10–5
1 000
Time, h
Martensitic stainless steel
Basic bearing number
Clean Pro PRA Bearing
–3
Dimensions Table
Product Specifications
SE
● Comparable to the Clean Pro Bearing in gas
emissions.
Comparison of particle emissions
300
Radial Ball Bearings
3
Ambient pressure, Pa
3-3
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
40
34
CERAMIC BEARINGS AND
BEARINGS
2
DL Bearing
3
Performance
This bearing is lubricated with the packed fluorinated KDL grease, which is suitable for use in
clean environments and vacuum environments.
● Suitable for clean and vacuum applications
thanks to low particle emissions.
Applicable Environments
Comparison of particle emissions
Vacuum
Electric field
High speed
High temperature
Corrosive
200
100
0
-30
-100
1
10
102
103
104
200
100
25
0
-30
-100
Cleanliness, class
105
1
KDL grease
Average particle emissions
Magnetic field
300
Ambient temperature, °C
Clean
PFPE
Dropping point
None
0.1wt%max.
Operating
temperature range
10–5
Commercially available grease
–30 to 200˚C
In vacuum
–30 to 100˚C
Ambient pressure, Pa
Boundary dimensions
mm
Bearing No.
Martensitic stainless steel
d
r
4
Outer ring Inner ring Ball
5
r
6
φd
φD
7
Austenitic stainless steel
Cage
8
Shield
9
Dynamic equivalent load
(X and Y are as shown below.)
P0r = 0.6Fr + 0.5Fa
ZZST YS
Grease packed
Fa
── ≦
Fr
Fa
── ＞
Fr
e
e
C0r
f0
0.30
12.4
10 000
9 000
min–1
4
0.2
SV604ZZSTC3 YS
0.80
13
5
0.2
SV624ZZSTC3 YS
1.10
0.40
12.3
14
5
0.2
SV605ZZSTC3 YS
1.10
0.40
12.3
8 000
16
5
0.3
SV625-5ZZSTC3 YS
1.45
0.55
12.4
6 700
12
17
6
0.3
SV606ZZSTC3 YS
1.65
0.60
12.2
6 600
19
6
0.3
SV626ZZSTC3 YS
2.20
0.85
12.3
5 900
19
6
0.3
SV607ZZSTC3 YS
2.20
0.85
12.3
5 700
22
7
0.3
SV627ZZSTC3 YS
2.80
1.10
12.4
4 900
22
7
0.3
SV608ZZSTC3 YS
2.80
1.10
12.4
5 000
24
8
0.3
SV628ZZSTC3 YS
2.85
1.10
12.8
4 700
24
7
0.3
SV609ZZSTC3 YS
2.85
1.10
12.8
4 400
26
8
0.6
SV629ZZSTC3 YS
3.90
1.55
12.4
3 900
7.142
0.5
SVEE3SZZSTC3 YS
2.85
1.10
12.8
5 600
8
0.3
SV6000ZZSTC3 YS
3.85
1.55
12.3
4 000
30
9
0.6
SV6200ZZSTC3 YS
4.35
1.90
13.2
3 400
12
28
8
0.3
SV6001ZZSTC3 YS
4.35
1.90
13.2
3 300
32
10
0.6
SV6201ZZSTC3 YS
5.75
2.45
12.3
3 100
15
32
9
0.3
SV6002ZZSTC3 YS
4.75
2.25
13.9
2 600
35
11
0.6
SV6202ZZSTC3 YS
6.50
3.00
13.2
2 400
17
35
10
0.3
SV6003ZZSTC3 YS
5.10
2.60
14.4
2 300
40
12
0.6
SV6203ZZSTC3 YS
8.15
3.85
13.2
2 100
20
42
12
0.6
SV6004ZZSTC3 YS
8.00
4.05
13.9
2 000
5.35
13.2
1 800
4.65
14.5
1 600
e
0.172
0.345
0.689
0.19
0.22
0.26
2.30
1.99
1.71
47
14
1
SV6204ZZSTC3 YS
1.03
1.38
2.07
0.28
0.30
0.34
1.55
1.45
1.31
25
47
12
0.6
SV6005ZZSTC3 YS
52
15
1
SV6205ZZSTC3 YS
11.9
6.30
13.9
1 400
3.45
5.17
6.89
0.38
0.42
0.44
1.15
1.04
1.00
30
55
13
1
SV6006ZZSTC3 YS
11.2
6.60
14.7
1 300
62
16
1
SV6206ZZSTC3 YS
16.5
9.05
13.9
1 200
35
62
14
1
SV6007ZZSTC3 YS
13.5
8.25
14.9
1 100
72
17
1.1
SV6207ZZSTC3 YS
21.8
40
68
15
1
SV6008ZZSTC3 YS
14.2
80
18
1.1
SV6208ZZSTC3 YS
24.8
X
1
Y
0
X
0.56
Y
Available from stock
■ LCD manufacturing systems ■ Transfer robots
Cr
f0Fa
────
C0r
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Applications
r
(min.)
26
When P0r is smaller than Fr .
P0r = Fr
B
Basic load ratings 1)
Factor Limiting 2)
kN
speed
10
Static equivalent load
Bearing Numbering System
D
9.525 22.225
Pr = XFr + YFa
■ Semiconductor manufacturing systems
■ Vacuum pumps
2wt%max.
In atmospheric air
KDL grease
B
35
PTFE
Base oil
Oil separation (100˚C×24h)
Product Specifications
SV
Thickener
Evaporation (200˚C×22h)
10 000
Dimensions Table
Basic bearing number
Grease properties
(Particles 0.1 µm or greater in diameter)
20 000
300
Radial Ball Bearings
3-4
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
10.9
8.55
12.3
9.20
14.3
13.9
1 000
15.2
1 000
14.0
900
Note 1) The basic load ratings are those of bearing made from SUS440C.
To calculate dynamic equivalent radial loads, multiply the C0r value in this table by 1.25.
2) The limiting speed is that determined based on the condition that the cleanliness requirement is class 100.
36
CERAMIC BEARINGS AND
BEARINGS
2
PN Bearing
3
Performance
This bearing has a highly heat resistant solid lubricant, such as molybdenum disulfide included
in the cage material.
● Useful up to 300˚C in a vacuum.
● Excellent in lubricant service life in
temperatures from room temp. to 300˚C.
Applicable Environments
10–2
300
Vacuum
Electric field
High speed
High temperature
Corrosive
200
100
0
-30
-100
105
10–3
Background pressure
Clean Pro Bearing
10–4
PN Bearing
10–5
10–5
1
5
Room
temp.
2
Room
temp.
1
100
200
300
0
400
Clean Pro Bearing
PN Bearing
Dimensions Table
Boundary dimensions
mm
Martensitic stainless steel
Bearing No.
B
d
r
Outer ring Inner ring Ball
4
r
PEEK resin
5
φd
φD
6
Cage
7
8
Austenitic stainless steel
9
Dynamic equivalent load
Pr = XFr + YFa
ZZST ＰＮ
Solid lubricant
Molded PEEK resin cage
0.172
0.345
0.689
0.19
0.22
0.26
1.03
1.38
2.07
0.28
0.30
0.34
3.45
5.17
6.89
0.38
0.42
0.44
X
1
0
40
1 000
SE605ZZSTC3 PN
40
1 000
16
5
0.3
SE625-5ZZSTC3 PN
55
1 000
17
6
0.3
SE606ZZSTC3 PN
60
1 000
19
6
0.3
SE626ZZSTC3 PN
80
1 000
19
6
0.3
SE607ZZSTC3 PN
80
1 000
22
7
0.3
SE627ZZSTC3 PN
100
1 000
22
7
0.3
SE608ZZSTC3 PN
100
1 000
24
8
0.3
SE628ZZSTC3 PN
100
1 000
24
7
0.3
SE609ZZSTC3 PN
100
1 000
135
970
1 000
26
8
0.3
SE6000ZZSTC3 PN
135
1 000
30
9
0.6
SE6200ZZSTC3 PN
155
860
12
28
8
0.3
SE6001ZZSTC3 PN
155
830
32
10
0.6
SE6201ZZSTC3 PN
205
770
15
32
9
0.3
SE6002ZZSTC3 PN
170
660
X
2.30
1.99
1.71
35
11
0.6
SE6202ZZSTC3 PN
230
610
17
35
10
0.3
SE6003ZZSTC3 PN
180
580
40
12
0.6
SE6203ZZSTC3 PN
285
0.56
530
1.55
1.45
1.31
20
42
12
0.6
SE6004ZZSTC3 PN
280
500
47
14
1
SE6204ZZSTC3 PN
385
450
47
12
0.6
SE6005ZZSTC3 PN
305
400
52
15
1
SE6205ZZSTC3 PN
420
360
55
13
1
SE6006ZZSTC3 PN
395
330
62
16
1
SE6206ZZSTC3 PN
585
300
62
14
1
SE6007ZZSTC3 PN
475
280
72
17
1.1
SE6207ZZSTC3 PN
770
250
68
15
1
SE6008ZZSTC3 PN
500
250
80
18
1.1
SE6208ZZSTC3 PN
875
220
e
Y
1.15
1.04
1.00
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
■ Liquid crystal washing systems
SE624ZZSTC3 PN
0.2
100
Available from stock
■ Drink carton manufacturing facilities
0.2
5
SEEE3SZZSTC3 PN
25
30
Applications
5
14
1 000
SE629ZZSTC3 PN
Fa
── ＞
Fr
Y
13
30
0.5
P0r = Fr
e
min–1
SE604ZZSTC3 PN
0.6
10
Fa
── ≦
Fr
N
0.2
8
When P0r is smaller than Fr .
e
r
(min.)
7.142
P0r = 0.6Fr + 0.5Fa
f0Fa
────
C0r
B
Permissible Limiting
radial load speed
4
12
9.525 22.225
Static equivalent load
Bearing Numbering System
D
26
(X and Y are as shown below.)
Shield
35
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
37
200˚C
3
Ambient temperature, ˚C
Product Specifications
Basic bearing number
300˚C
4
200˚C
0
Ambient pressure, Pa
SE
Comparison in torque life
Service life in ratio
Magnetic field
Gas emission characteristics
Discontinued
Ambient pressure, Pa
Clean
Radial Ball Bearings
3-5
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
40
38
CERAMIC BEARINGS AND
BEARINGS
2
WS Bearing
Performance
This bearing has extremely heat resistant tungsten disulfide included in the separator material
as the lubricant.
● Free from problematic gas emissions under the
conditions of up to 10–5 Pa and up to 350˚C.
Applicable Environments
400
Vacuum
High speed
Magnetic field
Electric field
High temperature
Corrosive
● Highly heat resistant and superior to the Clean
Pro Bearing in lubrication life.
Analysis of emitted gas
103
1012
Comparison in torque life
350
H2O
300
Ionic strength
Clean
200
100
1010
102
H2
CO, N2
CO2
10
-100
WS Bearing
108
106
Clean Pro Bearing
0
104
105
1
10–5
1
0
10
20
30
40
50
60
70
102
80
0
Mass
Ambient pressure, Pa
5
10
15
Ratio of radial load to basic dynamic load rating, %
Dimensions Table
Product Specifications
Boundary dimensions
mm
Martensitic stainless steel
Bearing No.
B
d
r
r
φd
φD
Separator
N
min–1
SE606ZZSTC4 WS
100
500
19
6
0.3
SE626ZZSTC4 WS
130
500
7
19
6
0.3
SE607ZZSTC4 WS
130
500
22
7
0.3
SE627ZZSTC4 WS
165
490
8
22
7
0.3
SE608ZZSTC4 WS
165
500
24
8
0.3
SE628ZZSTC4 WS
170
470
9
24
7
0.3
SE609ZZSTC4 WS
170
440
26
10
Shield
Dynamic equivalent load
12
Pr = XFr + YFa
(X and Y are as shown below.)
Static equivalent load
15
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
P0r = Fr
Bearing Numbering System
Basic bearing number
Solid lubricant
ZZST WS
Separators including tungsten disulfide
17
Fa
── ≦
Fr
Fa
── ＞
Fr
e
e
f0Fa
────
C0r
e
0.172
0.345
0.689
0.19
0.22
0.26
2.30
1.99
1.71
25
1.03
1.38
2.07
0.28
0.30
0.34
1.55
1.45
1.31
30
3.45
5.17
6.89
0.38
0.42
0.44
X
1
Y
0
X
0.56
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Applications
20
Y
1.15
1.04
1.00
r
(min.)
0.3
8
0.6
SE629ZZSTC4 WS
230
390
7.142
0.5
SEEE3SZZSTC4 WS
165
410
26
8
0.3
SE6000ZZSTC4 WS
230
400
30
9
0.6
SE6200ZZSTC4 WS
255
340
28
8
0.3
SE6001ZZSTC4 WS
255
330
32
10
0.6
SE6201ZZSTC4 WS
340
310
9.525 22.225
Austenitic stainless steel
B
6
6
Sintered composite material
including tungsten disulfide
D
Permissible Limiting
radial load speed
17
Outer ring Inner ring Ball
SE
Radial Ball Bearings
3
Life (Revolutions)
3-6
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
35
40
32
9
0.3
SE6002ZZSTC4 WS
280
260
35
11
0.6
SE6202ZZSTC4 WS
385
240
230
35
10
0.3
SE6003ZZSTC4 WS
300
40
12
0.6
SE6203ZZSTC4 WS
480
210
42
12
0.6
SE6004ZZSTC4 WS
470
200
47
14
1
SE6204ZZSTC4 WS
640
180
47
12
0.6
SE6005ZZSTC4 WS
505
160
52
15
1
SE6205ZZSTC4 WS
700
140
55
13
1
SE6006ZZSTC4 WS
660
130
62
16
1
SE6206ZZSTC4 WS
975
120
62
14
1
SE6007ZZSTC4 WS
795
110
72
17
1.1
SE6207ZZSTC4 WS
1 285
100
68
15
1
SE6008ZZSTC4 WS
835
100
80
18
1.1
SE6208ZZSTC4 WS
1 455
90
Available from stock
■ Semiconductor manufacturing systems ■ LCD manufacturing systems
■ Plasma display panel manufacturing systems
39
■ Vacuum evaporation systems
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
40
CERAMIC BEARINGS AND
BEARINGS
2
MO Bearing
3
Performance
This bearing has molybdenum disulfide baked on the surface of the stainless steel cage, as the
lubricant.
Radial Ball Bearings
3-7
● Molybdenum disulfide compares to the common PTFE
coating in lubrication life but is superior in heat resistance.
Comparison in lubrication life
Applicable Environments
Clean Pro Bearing
PTFE coated bearing
Clean
Magnetic field
Vacuum
Electric field
High speed
High temperature
Corrosive
Axial load, N
300
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
200
100
100
MO Bearing
50
0
105
104
-100
106
107
Lubrication life (Revolutions)
105
10–5
1
Ambient pressure, Pa
Dimensions Table
Boundary dimensions
mm
Product Specifications
Bearing No.
B
Martensitic stainless steel
d
SE624ZZSTMSA7C3 YS
1.30
0.49
12.3
40
1 000
SE605ZZSTMSA7C3 YS
1.30
0.49
12.3
40
1 000
16
5
0.3
SE625-5ZZSTMSA7C3 YS
1.75
0.67
12.4
55
1 000
17
6
0.3
SE606ZZSTMSA7C3 YS
1.95
0.74
12.2
60
1 000
19
6
0.3
SE626ZZSTMSA7C3 YS
2.60
1.05
12.3
80
1 000
19
6
0.3
SE607ZZSTMSA7C3 YS
2.60
1.05
12.3
80
1 000
22
7
0.3
SE627ZZSTMSA7C3 YS
3.30
1.35
12.4
100
1 000
22
7
0.3
SE608ZZSTMSA7C3 YS
3.30
1.35
12.4
100
1 000
24
8
0.3
SE628ZZSTMSA7C3 YS
3.35
1.40
12.8
100
1 000
24
7
0.3
SE609ZZSTMSA7C3 YS
3.35
1.40
12.8
100
1 000
26
8
0.6
SE629ZZSTMSA7C3 YS
4.55
1.95
12.4
135
970
22.225
7.142
0.5
SEEE3SZZSTMSA7C3 YS
3.35
1.40
12.8
100
1 000
26
8
0.3
SE6000ZZSTMSA7C3 YS
4.55
1.95
12.3
135
1 000
30
9
0.6
SE6200ZZSTMSA7C3 YS
5.10
2.40
13.2
155
860
28
8
0.3
SE6001ZZSTMSA7C3 YS
5.10
2.40
13.2
155
830
32
10
0.6
SE6201ZZSTMSA7C3 YS
6.80
3.05
12.3
205
770
15
32
9
0.3
SE6002ZZSTMSA7C3 YS
5.60
2.85
13.9
170
660
35
11
0.6
SE6202ZZSTMSA7C3 YS
7.65
3.75
13.2
230
610
Y
17
35
10
0.3
SE6003ZZSTMSA7C3 YS
6.00
3.25
14.4
180
580
2.30
1.99
1.71
40
12
0.6
SE6203ZZSTMSA7C3 YS
9.55
4.80
13.2
285
530
20
42
12
0.6
SE6004ZZSTMSA7C3 YS
9.40
5.05
13.9
280
500
1.55
1.45
1.31
47
14
1
SE6204ZZSTMSA7C3 YS
12.8
6.65
13.2
385
450
25
47
12
0.6
SE6005ZZSTMSA7C3 YS
10.1
5.85
14.5
305
400
1.15
1.04
1.00
52
15
1
SE6205ZZSTMSA7C3 YS
14.0
7.85
13.9
420
360
30
55
13
1
SE6006ZZSTMSA7C3 YS
13.2
8.25
14.7
395
330
62
16
1
SE6206ZZSTMSA7C3 YS
19.5
11.3
13.9
585
300
35
62
14
1
SE6007ZZSTMSA7C3 YS
15.9
10.3
14.9
475
280
72
17
1.1
SE6207ZZSTMSA7C3 YS
25.7
15.4
13.9
770
250
40
68
15
1
SE6008ZZSTMSA7C3 YS
16.7
11.5
15.2
500
250
80
18
1.1
SE6208ZZSTMSA7C3 YS
29.1
17.8
14.0
875
220
9
Dynamic equivalent load
9.525
Pr = XFr + YFa
(X and Y are as shown below.)
10
Static equivalent load
P0r = 0.6Fr + 0.5Fa
12
When P0r is smaller than Fr .
P0r = Fr
SE
Basic bearing number
Solid lubricant
Z Z S T ＭＳＡ７ ＹＳ
Molybdenum disulfide baked stainless steel cage
0.172
0.345
0.689
0.19
0.22
0.26
1.03
1.38
2.07
0.28
0.30
0.34
3.45
5.17
6.89
0.38
0.42
0.44
1
Fa
── ＞
Fr
0
X
0.56
e
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Applications
Available from stock
■ Semiconductor manufacturing systems ■ LCD manufacturing systems
■ Turbo molecular pumps ■ Rotary furnaces
41
■ Vacuum evaporation systems
1 000
0.2
8
Y
min–1
30
0.2
Shield
X
N
5
6
e
12.4
5
φd
Fa
── ≦
Fr
0.36
14
Austenitic stainless steel
e
0.97
f0
13
7
f0Fa
────
C0r
C0r
SE604ZZSTMSA7C3 YS
5
φD
Cr
0.2
r
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
12
r
(min.)
4
Outer ring Inner ring Ball
Bearing Numbering System
B
r
4
Cage
D
Basic load ratings 1)
Factor Permissible Limiting
kN
radial load speed
Note 1) The basic load ratings are those of normal bearing (used to calculate lubrication life).
The permissible radial loads can be regarded as the maximum loads applicable to individual bearings.
42
CERAMIC BEARINGS AND
BEARINGS
2
MG Bearing
3
Performance
This bearing has silver ion plated on the stainless steel balls, as the lubricant.
● Useful in an ultrahigh vacuum environment of 10–10 Pa thanks to low gas
emissions in an ultrahigh vacuum.
Applicable Environments
Analysis of emitted gas
600
104
Vacuum
High speed
Magnetic field
Electric field
High temperature
Corrosive
Before rotation
At 2 minutes
Ambient pressure: 1.7 ✕ 10–8
400
350
Ionic strength
Clean
Radial Ball Bearings
3-8
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
200
0
103
10
At 10 hours
Ambient pressure: 2.6 ✕ 10–8
Ambient pressure: 4.6 ✕ 10–7
H2
2
H2
H2O CO, N2
H2O
10
CO, N2
H2
Ar CO2
H2O
CO, N2
CO2
CO2
1
-200
106
1
10–3
0
10–10
10
20
30
40
50
60 0
10
20
30
Mass
40
50
60 0
10
20
Mass
30
40
50
60
Mass
Ambient pressure, Pa
Dimensions Table
Product Specifications
Boundary dimensions
mm
Bearing No.
Martensitic stainless steel
B
d
4
5
r
6
φd
φD
Austenitic stainless steel
7
Shield
8
9
Dynamic equivalent load
Pr = XFr + YFa
9.525
(X and Y are as shown below.)
10
Static equivalent load
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
12
P0r = Fr
Bearing Numbering System
SE
Basic bearing number
Solid lubricant
Z Z S T ＭＧ３ ＹＳ
Silver ion plated balls
Fa
── ≦
Fr
Fa
── ＞
Fr
e
e
f0Fa
────
C0r
e
0.172
0.345
0.689
0.19
0.22
0.26
2.30
1.99
1.71
1.03
1.38
2.07
0.28
0.30
0.34
1.55
1.45
1.31
3.45
5.17
6.89
0.38
0.42
0.44
X
1
Y
0
X
0.56
15
Y
1.15
1.04
1.00
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Applications
17
20
25
30
35
Available from stock
■ Semiconductor manufacturing systems ■ LCD manufacturing systems
■ Medical equipment ■ Vacuum motors
43
■ Vacuum evaporation systems
B
r
Outer ring Inner ring Ball
Cage
D
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
40
r
(min.)
Basic load ratings 1)
Factor Permissible Limiting
kN
radial load speed
Cr
C0r
0.97
0.36
f0
N
min–1
30
1 000
4
0.2
SE604ZZSTMG3C4 YS
13
5
0.2
SE624ZZSTMG3C4 YS
1.30
0.49
12.3
40
1 000
14
5
0.2
SE605ZZSTMG3C4 YS
1.30
0.49
12.3
40
1 000
16
5
0.3
SE625-5ZZSTMG3C4 YS
1.75
0.67
12.4
55
1 000
17
6
0.3
SE606ZZSTMG3C4 YS
1.95
0.74
12.2
60
1 000
19
6
0.3
SE626ZZSTMG3C4 YS
2.60
1.05
12.3
80
1 000
19
6
0.3
SE607ZZSTMG3C4 YS
2.60
1.05
12.3
80
1 000
22
7
0.3
SE627ZZSTMG3C4 YS
3.30
1.35
12.4
100
1 000
22
7
0.3
SE608ZZSTMG3C4 YS
3.30
1.35
12.4
100
1 000
24
8
0.3
SE628ZZSTMG3C4 YS
3.35
1.40
12.8
100
1 000
24
7
0.3
SE609ZZSTMG3C4 YS
3.35
1.40
12.8
100
1 000
26
8
0.6
SE629ZZSTMG3C4 YS
4.55
1.95
12.4
135
970
22.225
7.142
0.5
SEEE3SZZSTMG3C4 YS
3.35
1.40
12.8
100
1 000
26
8
0.3
SE6000ZZSTMG3C4 YS
4.55
1.95
12.3
135
1 000
30
9
0.6
SE6200ZZSTMG3C4 YS
5.10
2.40
13.2
155
860
28
8
0.3
SE6001ZZSTMG3C4 YS
5.10
2.40
13.2
155
830
32
10
0.6
SE6201ZZSTMG3C4 YS
6.80
3.05
12.3
205
770
32
9
0.3
SE6002ZZSTMG3C4 YS
5.60
2.85
13.9
170
660
35
11
0.6
SE6202ZZSTMG3C4 YS
7.65
3.75
13.2
230
610
35
10
0.3
SE6003ZZSTMG3C4 YS
6.00
3.25
14.4
180
580
40
12
0.6
SE6203ZZSTMG3C4 YS
9.55
4.80
13.2
285
530
42
12
0.6
SE6004ZZSTMG3C4 YS
47
14
1
SE6204ZZSTMG3C4 YS
12.8
47
12
0.6
SE6005ZZSTMG3C4 YS
10.1
5.85
14.5
305
400
52
15
1
SE6205ZZSTMG3C4 YS
14.0
7.85
13.9
420
360
55
13
1
SE6006ZZSTMG3C4 YS
13.2
62
16
1
SE6206ZZSTMG3C4 YS
19.5
62
14
1
SE6007ZZSTMG3C4 YS
15.9
10.3
14.9
475
280
72
17
1.1
SE6207ZZSTMG3C4 YS
25.7
15.4
13.9
770
250
68
15
1
SE6008ZZSTMG3C4 YS
16.7
11.5
15.2
500
250
80
18
1.1
SE6208ZZSTMG3C4 YS
29.1
17.8
14.0
875
220
12
9.40
12.4
5.05
13.9
280
500
6.65
13.2
385
450
8.25
11.3
14.7
395
330
13.9
585
300
Note 1) The basic load ratings are those of normal bearing (used to calculate lubrication life).
The permissible radial loads can be regarded as the maximum loads applicable to individual bearings.
44
CERAMIC BEARINGS AND
BEARINGS
2
3-9
High Temperature Hybrid Ceramic Bearing
This bearing has graphite (carbon) as the lubricant, which is excellent in heat resistance.
3
Dimensions Table
Boundary dimensions
mm
Applicable Environments
Bearing No.
Cage stick out
B
d
r
6
r
Clean
7
Magnetic field
Vacuum
Electric field
High speed
High temperature
φd
φD
● Temperature: –100 to 500˚C
8
● Ambient pressure: Atmospheric pressure
9
D
Static equivalent load
Outer ring Inner ring
Ceramic (silicon nitride)
Ball
Graphite
Cage
f0Fa
────
C0r
e
0.172
0.345
0.689
Fa
── ≦
Fr
X
Fa
── ＞
Fr
e
0.3
3NC606HT4C4 GF
2
60
6
0.3
3NC626HT4C4 GF
2
80
500
19
6
0.3
3NC607HT4C4 GF
2
80
500
22
7
0.3
3NC627HT4C4 GF
2
100
490
22
7
0.3
3NC608HT4C4 GF
2
100
500
24
8
0.3
3NC628HT4C4 GF
2
100
470
24
7
0.3
3NC609HT4C4 GF
2
100
440
3NC629HT4C4 GF
3
135
390
3NCEE3SHT4C4 GF
2
100
410
26
8
0.3
3NC6000HT4C4 GF
1
135
400
30
9
0.6
3NC6200HT4C4 GF
2
155
340
12
28
8
0.3
3NC6001HT4C4 GF
1
155
330
32
10
0.6
3NC6201HT4C4 GF
3
205
310
15
32
9
0.3
3NC6002HT4C4 GF
1
170
260
35
11
0.6
3NC6202HT4C4 GF
3
230
240
17
35
10
0.3
3NC6003HT4C4 GF
1
180
230
40
12
0.6
3NC6203HT4C4 GF
3
285
210
42
12
0.6
3NC6004HT4C4 GF
2
280
200
47
14
1
3NC6204HT4C4 GF
4
385
180
47
12
0.6
3NC6005HT4C4 GF
2
305
160
52
15
1
3NC6205HT4C4 GF
3
420
140
55
13
1
3NC6006HT4C4 GF
3
395
130
62
16
1
3NC6206HT4C4 GF
5
585
120
62
14
1
3NC6007HT4C4 GF
4
475
110
72
17
1.1
3NC6207HT4C4 GF
7
770
100
68
15
1
3NC6008HT4C4 GF
3
500
100
80
18
1.1
3NC6208HT4C4 GF
7
875
90
e
25
0.19
0.22
0.26
2.30
1.99
1.71
30
1.03
1.38
2.07
0.28
0.30
0.34
1.55
1.45
1.31
35
3.45
5.17
6.89
0.38
0.42
0.44
1.15
1.04
1.00
40
0
X
20
Y
1
Y
0.56
500
6
0.5
P0r = Fr
High speed tool steel
min–1
0.6
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
N
8
Pr = XFr + YFa
(X and Y are as shown below.)
mm (max.)
7.142
10
Dynamic equivalent load
r
(min.)
19
26
Corrosive
B
Cage Permissible Limiting
stick out radial load speed
17
9.525 22.225
Product Specifications
Radial Ball Bearings
EXSEV Bearings and Other EXSEV Products
2
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Available from stock
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
Bearing Numbering System
3 Ｎ Ｃ Basic bearing number ＨＴ４ ＧＦ
Hybrid ceramic bearing
High speed tool steel Graphite cage
Applications
■ Conveyors inside kilns
45
■ Bogies in furnaces
46
CERAMIC BEARINGS AND
BEARINGS
2
Full Complement Ceramic Ball Bearing
3
Dimensions Table
This bearing has all components made of ceramic for use in an ultrahigh temperature environments.
No cage is provided. Being an angular contact ball bearing, this bearing is normally used in pairs.
Boundary dimensions
mm
B
Applicable Environments
r
d
r1
D
B
1000
4
Clean
Magnetic field
Vacuum
Electric field
High speed
High temperature
800
Corrosive
r
r
5
600
φd
φD
400
6
200
7
0
-200
106
105
8
10–10
1
Ambient pressure, Pa
r
(min.)
r1
(min.)
N
min–1
12
4
0.2
0.1
NC704V
10
13
5
0.2
0.1
NC724V
15
500
14
5
0.2
0.1
NC705V
15
500
16
5
0.2
0.1
NC725V
25
500
17
6
0.3
0.15
NC706V
20
500
19
6
0.3
0.15
NC726V
35
500
19
6
0.3
0.15
NC707V
30
500
22
7
0.3
0.15
NC727V
40
490
22
7
0.3
0.15
NC708V
40
500
500
24
8
0.3
0.15
NC728V
40
470
24
7
0.3
0.15
NC709V
40
440
26
8
0.3
0.15
NC729V
50
390
10
26
8
0.3
0.15
NC7000V
55
400
30
9
0.6
0.3
NC7200V
60
340
12
28
8
0.3
0.15
NC7001V
60
330
32
10
0.6
0.3
NC7201V
85
310
15
32
9
0.3
0.15
NC7002V
70
260
35
11
0.6
0.3
NC7202V
90
240
17
35
10
0.3
0.15
NC7003V
75
230
40
12
0.6
0.3
NC7203V
115
210
0.78 0.63 1.24
20
42
12
0.6
0.3
NC7004V
115
200
47
14
1
0.6
NC7204V
160
180
* In the case of back-to-back duplex bearings and face-toface duplex bearings, apply 2 to i. As for single row
bearings and tandem duplex bearings, apply 1 to i.
25
47
12
1
0.6
NC7005V
125
160
52
15
1
0.6
NC7205V
170
140
30
55
13
1
0.6
NC7006V
160
130
62
16
1
0.6
NC7206V
235
120
35
62
14
1
0.6
NC7007V
195
110
72
17
1.1
0.6
NC7207V
310
100
40
68
15
1
0.6
NC7008V
195
100
80
18
1.1
0.6
NC7208V
370
90
(X and Y are as shown below.)
Static equivalent load
P0r = 0.6Fr + 0.5Fa
Product Specifications
When P0r is smaller than Fr .
Contact angle
P0r = Fr
Outer ring Inner ring Ball
Permissible Limiting
Bearing No. radial load speed
9
Dynamic equivalent load
Pr = XFr + YFa
Ceramic (silicon nitride)
Radial Ball Bearings
3 - 10
Ambient temperature, °C
Single row or tandem mounting Back to back or face to face
if0Fa
────
C0r
30°
Contact
angle
EXSEV Bearings and Other EXSEV Products
2
30°
Fa
── ≦
Fr
e
X
–
0.80
1
e
Y
0
Fa
── ＞
Fr
e
X
Y
0.39 0.76
Fa
── ≦
Fr
X
1
e
Y
Fa
── ＞
Fr
X
e
Y
Single row or
Back to back or
tandem mounting face to face
X0
Y0
X0
Y0
0.5
0.33
1
0.66
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Available from stock
30 days after receiving an order
45 days after receiving an order
Bearing Numbering System
Determined after consultation on each inquiry
N C Basic bearing number V
Ceramic bearing
Full complement ball bearing
Applications
■ Conveyors inside kilns
47
■ Fans in furnaces
48
CERAMIC BEARINGS AND
BEARINGS
2
3 - 11
SK Bearing
3
This bearing has its components made of stainless steel, and is lubricated with lithium containing KHD grease,
which is packed in adequate amounts. This bearing is suitable for use in slightly corrosive environments.
Radial Ball Bearings
EXSEV Bearings and Other EXSEV Products
2
Grease Properties
Grease properties
Applicable Environments
KHD grease
Clean
Magnetic field
Vacuum
Electric field
High speed
High temperature
● Temperature: – 30 to 120˚C
● Ambient pressure: Atmospheric pressure
● Unsuitable for clean environments due to anticorrosive treatment.
Thickener
Lithium soap
Base oil
Poly -a- olefin
Dropping point
203˚C
Evaporation (99˚C ✕ 22h)
0.14wt%
Oil separation (100˚C ✕ 24 h)
0.1wt%
Operating temperature range
–30 to 120˚C
Corrosive
Dimensions Table
Product Specifications
Basic load ratings 1)
Factor
kN
Boundary dimensions
mm
Bearing No.
B
Martensitic stainless steel
r
r
φd
12.3
31 000
36 000
1.90
13.2
24 000
29 000
0.3
SK6001ZZST YS
4.35
1.90
13.2
27 000
32 000
0.6
SK6201ZZST YS
5.75
2.45
12.3
22 000
27 000
0.3
9
0.6
28
8
32
10
30
35
Dynamic equivalent load
40
Static equivalent load
1.55
4.35
8
30
25
S K Basic bearing number Z Z S T Y S
3.85
SK6200ZZST YS
26
17
(X and Y are as shown below.)
SK6000ZZST YS
10
15
Pr = XFr + YFa
Grease
lubrication
r
(min.)
20
Bearing Numbering System
f0
B
Austenitic stainless steel
Shield
C0r
D
12
φD
Cr
d
Outer ring Inner ring Ball
Cage
Limiting speeds 2)
min–1
Oil
lubrication
32
9
0.3
SK6002ZZST YS
4.75
2.25
13.9
23 000
27 000
35
11
0.6
SK6202ZZST YS
6.50
3.00
13.2
20 000
24 000
35
10
0.3
SK6003ZZST YS
5.10
2.60
14.4
21 000
25 000
40
12
0.6
SK6203ZZST YS
8.15
3.85
13.2
17 000
21 000
8.00
4.05
13.9
17 000
21 000
5.35
13.2
15 000
17 000
42
12
0.6
SK6004ZZST YS
47
14
1
SK6204ZZST YS
10.9
47
12
0.6
SK6005ZZST YS
4.65
14.5
15 000
18 000
52
15
1
SK6205ZZST YS
11.9
8.55
6.30
13.9
13 000
15 000
55
13
1
SK6006ZZST YS
11.2
6.60
14.7
13 000
15 000
62
16
1
SK6206ZZST YS
16.5
9.05
13.9
11 000
13 000
8.25
14.9
11 000
13 000
13.9
9 200
11 000
15.2
10 000
12 000
14.0
8 300
10 000
62
14
1
SK6007ZZST YS
13.5
72
17
1.1
SK6207ZZST YS
21.8
68
15
1
SK6008ZZST YS
14.2
80
18
1.1
SK6208ZZST YS
24.8
12.3
9.20
14.3
Note 1) The basic load ratings are those of bearing made from SUS440C.
To calculate the dynamic equivalent radial loads, multiply the C0r value in this table by 1.25.
Note 2) Bearings with a contact seal (2RS) are also available.
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
P0r = Fr
KHD grease packed
Applications
■ Chemical systems
49
■ Conveyer systems
Fa
── ≦
Fr
Fa
── ＞
Fr
e
e
f0Fa
────
C0r
e
0.172
0.345
0.689
0.19
0.22
0.26
2.30
1.99
1.71
1.03
1.38
2.07
0.28
0.30
0.34
1.55
1.45
1.31
3.45
5.17
6.89
0.38
0.42
0.44
X
1
Y
0
X
0.56
Y
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Available from stock
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
1.15
1.04
1.00
50
CERAMIC BEARINGS AND
BEARINGS
2
Corrosion Resistant Hybrid Ceramic Bearing
Performance
This bearing uses a stainless steel variety that has excellent corrosion resistance. As the
lubricant, fluoropolymer is used. It is compatible with underwater use.
Water resistance
Applicable Environments
Clean
Magnetic field
Vacuum
Electric field
High speed
High temperature
200
100
0
-100
1
● When this Corrosion Resistant Hybrid Ceramic
Bearing is used under water, its service life is
determined depending on the rust and/or wear
of bearing rings. The service life cannot be
estimated correctly from the rating life.
300
Ambient temperature, °C
300
Corrosive
10
102
103
104
Cleanliness, class
200
100
0
-100
105
1
10
5
1
10
50
100
500 1 000
5 000 10 000
Service life, h
Dimensions Table
Boundary dimensions
mm
Bearing No.
B
d
r
4
r
5
Ceramic (silicon nitride)
φd
φD
Ball
6
7
Fluorocarbon resin
8
Cage
9
Dynamic equivalent load
Pr = XFr + YFa
Austenitic stainless steel
10
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
Bearing Numbering System
ZZMD4 FA
Molded fluorocarbon resin cage
Precipitation hardening stainless steel
P0r = Fr
12
f0Fa
────
C0r
e
0.172
0.345
0.689
0.19
0.22
0.26
1.03
1.38
2.07
0.28
0.30
0.34
3.45
5.17
6.89
0.38
0.42
0.44
Fa
── ≦ e
Fr
X
1
Y
0
Fa
── ＞ e
Fr
X
Y
0.56
15
2.30
1.99
1.71
17
1.55
1.45
1.31
20
1.15
1.04
1.00
25
30
Applications
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Available from stock
■ Semiconductor manufacturing systems ■ Chemical processing systems
■ Food processing systems ■ Cleaning systems
35
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
40
B
r
(min.)
Permissible Limiting
radial load speed
min–1
N
12
4
0.2
3NC604ZZMD4 FA
13
5
0.2
3NC624ZZMD4 FA
10
1 000
14
5
0.2
3NC605ZZMD4 FA
10
1 000
16
5
0.3
3NC625-5ZZMD4 FA
15
1 000
17
6
0.3
3NC606ZZMD4 FA
15
1 000
19
6
0.3
3NC626ZZMD4 FA
20
1 000
19
6
0.3
3NC607ZZMD4 FA
20
1 000
22
7
0.3
3NC627ZZMD4 FA
25
1 000
22
7
0.3
3NC608ZZMD4C3 FA
25
1 000
24
8
0.3
3NC628ZZMD4 FA
25
1 000
24
7
0.3
3NC609ZZMD4 FA
25
1 000
7.5
1 000
8
0.6
3NC629ZZMD4 FA
35
970
7.142
0.5
3NCEE3SZZMD4 FA
35
1 000
26
8
0.3
3NC6000ZZMD4 FA
35
1 000
30
9
0.6
3NC6200ZZMD4 FA
50
860
28
8
0.3
3NC6001ZZMD4 FA
40
830
32
10
0.6
3NC6201ZZMD4 FA
70
770
32
9
0.3
3NC6002ZZMD4 FA
45
660
35
11
0.6
3NC6202ZZMD4 FA
75
610
35
10
0.3
3NC6003ZZMD4 FA
50
580
40
12
0.6
3NC6203ZZMD4 FA
95
530
42
12
0.6
3NC6004ZZMD4 FA
70
500
47
14
1
3NC6204ZZMD4 FA
130
450
47
12
0.6
3NC6005ZZMD4 FA
75
400
52
15
1
3NC6205ZZMD4 FA
140
360
55
13
1
3NC6006ZZMD4C3 FA
62
16
1
3NC6206ZZMD4 FA
62
14
1
3NC6007ZZMD4 FA
110
280
72
17
1.1
3NC6207ZZMD4 FA
210
250
68
15
1
3NC6008ZZMD4 FA
135
250
80
18
1.1
3NC6208ZZMD4 FA
230
220
9.525 22.225
Static equivalent load
Shield
D
26
(X and Y are as shown below.)
51
Rating life
Ambient pressure, Pa
Outer ring Inner ring
Hybrid ceramic bearing
50
10–5
Precipitation hardening
stainless steel
3NC
Corrosion Resistant
Hybrid Ceramic Bearing
90
● When this Corrosion Resistant Hybrid Ceramic
Bearing is not used under water, select one
based on the allowable radial load and limiting
speed specified in the Dimensions Table.
Product Specifications
Basic bearing number
Radial Ball Bearings
3
Failure, %
3 - 12
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
95
330
195
300
52
CERAMIC BEARINGS AND
BEARINGS
2
Ceramic Bearing
Performance
This bearing has its components made of silicon nitride ceramic and uses fluoropolymer as the
lubricant. It is typically used in vacuum and corrosive environments.
Clean
Magnetic field
Vacuum
Electric field
High speed
High temperature
200
100
0
-100
1
Corrosive
300
Ambient temperature, °C
300
10
102
103
104
200
100
0
-100
105
Cleanliness, class
1
10–5
10
5
Reduced to 3%
1
10
50
100
500
1 000
5 000 10 000
Service life, h
Boundary dimensions
mm
Bearing No.
B
d
r
4
5
r
φD
φd
6
Fluorocarbon resin
7
Cage
8
9
Dynamic equivalent load
Pr = XFr + YFa
10
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
P0r = Fr
FA
Molded fluorocarbon resin cage
12
f0Fa
────
C0r
e
0.172
0.345
0.689
0.19
0.22
0.26
1.03
1.38
2.07
0.28
0.30
0.34
3.45
5.17
6.89
0.38
0.42
0.44
Fa
── ≦ e
Fr
X
1
Y
0
Fa
── ＞ e
Fr
X
Y
0.56
15
2.30
1.99
1.71
17
1.55
1.45
1.31
20
1.15
1.04
1.00
25
30
Applications
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Available from stock
■ Semiconductor manufacturing systems ■ LCD manufacturing systems ■ Semiconductor inspection systems
■ Synthetic fiber manufacturing systems ■ Canning systems ■ Ultrasonic motors
35
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
40
B
r
(min.)
Basic load ratings
Factor Permissible Limiting
kN
radial load
speed
Cr
C0r
f0
min–1
N
12
4
0.2
NC604 FA
0.97
0.36
12.4
13
5
0.2
NC624 FA
1.30
0.49
12.3
10
1 000
14
5
0.2
NC605 FA
1.30
0.49
12.3
10
1 000
16
5
0.3
NC625-5 FA
1.75
0.67
12.4
15
1 000
17
6
0.3
NC606 FA
1.95
0.74
12.2
15
1 000
19
6
0.3
NC626 FA
2.60
1.05
12.3
20
1 000
19
6
0.3
NC607 FA
2.60
1.05
12.3
20
1 000
22
7
0.3
NC627 FA
3.30
1.35
12.4
25
1 000
22
7
0.3
NC608 FA
3.30
1.35
12.4
25
1 000
24
8
0.3
NC628 FA
3.35
1.40
12.8
25
1 000
24
7
0.3
NC609 FA
3.35
1.40
12.8
25
1 000
7.5
1 000
8
0.6
NC629 FA
4.55
1.95
12.4
35
970
7.142
0.5
NCEE3S FA
3.35
1.40
12.8
35
1 000
26
8
0.3
NC6000 FA
4.55
1.95
12.3
35
1 000
30
9
0.6
NC6200 FA
5.10
2.40
13.2
50
860
28
8
0.3
NC6001 FA
5.10
2.40
13.2
40
830
32
10
0.6
NC6201 FA
6.80
3.05
12.3
70
770
32
9
0.3
NC6002 FA
5.60
2.85
13.9
45
660
35
11
0.6
NC6202 FA
7.65
3.75
13.2
75
610
35
10
0.3
NC6003 FA
6.00
3.25
14.4
50
580
40
12
0.6
NC6203 FA
9.55
4.80
13.2
95
530
42
12
0.6
NC6004 FA
47
14
1
NC6204 FA
12.8
47
12
0.6
NC6005 FA
10.1
5.85
14.5
75
400
52
15
1
NC6205 FA
14.0
7.85
13.9
140
360
55
13
1
NC6006 FA
13.2
62
16
1
NC6206 FA
19.5
62
14
1
NC6007 FA
15.9
72
17
1.1
NC6207 FA
25.7
68
15
1
NC6008 FA
16.7
80
18
1.1
NC6208 FA
29.1
9.525 22.225
Static equivalent load
Bearing Numbering System
D
26
(X and Y are as shown below.)
53
Rating life
Dimensions Table
Outer ring Inner ring Ball
Ceramic bearing
50
● When this Ceramic Bearing is not used under
water, select one based on the permissible radial
load and limiting speed specified in the Dimensions
Table.
Ceramic (silicon nitride)
NC
Ceramic Bearing
90
Ambient pressure, Pa
Product Specifications
Basic bearing number
Typical water resistance
● This Ceramic Bearing can be used under water;
however, when used in a liquid with poor lubrication
characteristics, the load exerted on the bearing
should be no higher than 10% of the bearing’s
basic dynamic load rating. Also note that the
fatigue life of the bearing is 3% of its rating life
under water.
Applicable Environments
Radial Ball Bearings
3
Failure, %
3 - 13
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
9.40
5.05
13.9
70
500
6.65
13.2
130
450
8.25
14.7
95
330
13.9
195
300
10.3
14.9
110
280
15.4
13.9
210
250
11.5
15.2
135
250
17.8
14.0
230
220
11.3
54
CERAMIC BEARINGS AND
BEARINGS
2
Corrosion Resistant Ceramic Bearing
Performance
This bearing has its components made of corrosion resistant silicon nitride and is lubricated
with fluoropolymer. This bearing can be used even in a highly corrosive solution.
● In an acid or alkaline solution, this bearing has a longer service life than
bearings made from standard silicone nitride.
Applicable Environments
Magnetic field
Vacuum
Electric field
High speed
High temperature
200
100
0
Comparison in service life after immersion in acid or alkaline solutions
200
400
Service life, h
Clean
300
Ambient temperature, °C
300
100
0
300
4.0
200
100
2.5
1.0
0
-100
1
Corrosive
10
102
103
104
-100
105
Cleanliness, class
1
Standard
10–5
Corrosion resistant
Standard
Before immersion
After immersion in HCl
After immersion in KOH
Bearing No.
B
d
r
4
5
r
φD
φd
6
Fluorocarbon resin
7
Cage
8
9
Dynamic equivalent load
Pr = XFr + YFa
10
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
P0r = Fr
FA
Molded fluorocarbon resin cage
12
f0Fa
────
C0r
e
0.172
0.345
0.689
0.19
0.22
0.26
1.03
1.38
2.07
0.28
0.30
0.34
3.45
5.17
6.89
0.38
0.42
0.44
Fa
── ≦ e
Fr
X
1
Y
0
Fa
── ＞ e
Fr
X
Y
0.56
15
2.30
1.99
1.71
17
1.55
1.45
1.31
20
1.15
1.04
1.00
25
30
Applications
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Available from stock
■ LCD film processing systems ■ Aluminum film capacitor processing systems ■ Plating systems
■ Synthetic fiber manufacturing systems ■ Food container manufacturing systems
35
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
40
B
r
(min.)
Permissible Limiting
radial load speed
min–1
N
12
4
0.2
NCT604 FA
13
5
0.2
NCT624 FA
10
1 000
14
5
0.2
NCT605 FA
10
1 000
16
5
0.3
NCT625-5 FA
15
1 000
17
6
0.3
NCT606 FA
15
1 000
19
6
0.3
NCT626 FA
20
1 000
19
8
0.3
NCT607 FA
20
1 000
22
7
0.3
NCT627 FA
25
1 000
22
7
0.3
NCT608 FA
25
1 000
24
8
0.3
NCT628 FA
25
1 000
24
7
0.3
NCT609 FA
25
1 000
7.5
1 000
8
0.6
NCT629 FA
35
970
7.142
0.5
NCTEE3S FA
35
1 000
26
8
0.3
NCT6000 FA
35
1 000
30
9
0.6
NCT6200 FA
50
860
28
8
0.3
NCT6001 FA
40
830
32
10
0.6
NCT6201 FA
70
770
32
9
0.3
NCT6002 FA
45
660
35
11
0.6
NCT6202 FA
75
610
35
10
0.3
NCT6003 FA
50
580
40
12
0.6
NCT6203 FA
95
530
42
12
0.6
NCT6004 FA
70
500
47
14
1
NCT6204 FA
130
450
47
12
0.6
NCT6005 FA
75
400
52
15
1
NCT6205 FA
140
360
55
13
1
NCT6006 FA
95
330
62
16
1
NCT6206 FA
195
300
62
14
1
NCT6007 FA
110
280
72
17
1.1
NCT6207 FA
210
250
68
15
1
NCT6008 FA
135
250
80
18
1.1
NCT6208 FA
230
220
9.525 22.225
Static equivalent load
Bearing Numbering System
D
26
(X and Y are as shown below.)
55
Corrosion resistant
Boundary dimensions
mm
Outer ring Inner ring Ball
Corrosion resistant
ceramic bearing
Standard
Dimensions Table
Ceramic (corrosion resistant silicon nitride)
NCT
Corrosion resistant
Ambient pressure, Pa
Product Specifications
Basic bearing number
Radial Ball Bearings
3
Load, kN
3 - 14
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
56
CERAMIC BEARINGS AND
BEARINGS
2
High Corrosion Resistant Ceramic Bearing
3
This bearing uses a silicon carbide ceramic material, which is resistant to strong acids and
alkalis.
Dimensions Table
Boundary dimensions
mm
Bearing No.
B
Applicable Environments
Magnetic field
Vacuum
Electric field
High speed
High temperature
200
100
0
-100
1
Corrosive
300
Ambient temperature, °C
Clean
d
r
300
10
102
103
104
4
200
5
r
φD
100
φd
6
0
7
-100
8
105
Cleanliness, class
1
10–5
Ambient pressure, Pa
9
(X and Y are as shown below.)
10
Static equivalent load
P0r = 0.6Fr + 0.5Fa
12
When P0r is smaller than Fr .
P0r = Fr
Ceramic (silicon carbide)
Fluorocarbon resin
Cage
Fa
── ≦
Fr
Fa
── ＞
Fr
e
15
e
f0Fa
────
C0r
e
0.172
0.345
0.689
0.19
0.22
0.26
2.30
1.99
1.71
1.03
1.38
2.07
0.28
0.30
0.34
1.55
1.45
1.31
3.45
5.17
6.89
0.38
0.42
0.44
X
1
Y
0
X
0.56
Y
1.15
1.04
1.00
17
20
25
30
35
40
B
r
(min.)
Permissible Limiting
radial load speed
min–1
N
12
4
0.2
NCZ604 FA
13
5
0.2
NCZ624 FA
10
1 000
14
5
0.2
NCZ605 FA
10
1 000
16
5
0.2
NCZ625 FA
15
1 000
17
6
0.3
NCZ606 FA
15
1 000
19
6
0.3
NCZ626 FA
20
1 000
19
6
0.3
NCZ607 FA
20
1 000
22
7
0.3
NCZ627 FA
25
1 000
22
7
0.3
NCZ608 FA
25
1 000
24
8
0.3
NCZ628 FA
25
1 000
24
7
0.3
NCZ609 FA
25
1 000
7.5
1 000
8
0.6
NCZ629 FA
35
970
7.142
0.5
NCZEE3S FA
35
1 000
26
8
0.3
NCZ6000 FA
35
1 000
30
9
0.6
NCZ6200 FA
50
860
28
8
0.3
NCZ6001 FA
40
830
32
10
0.6
NCZ6201 FA
70
770
32
9
0.3
NCZ6002 FA
45
660
35
11
0.6
NCZ6202 FA
75
610
35
10
0.3
NCZ6003 FA
50
580
40
12
0.6
NCZ6203 FA
95
530
42
12
1
NCZ6004 FA
70
500
47
14
0.6
NCZ6204 FA
130
450
47
12
1
NCZ6005 FA
75
400
52
15
1
NCZ6205 FA
140
360
55
13
1
NCZ6006 FA
95
330
62
16
1
NCZ6206 FA
195
300
62
14
1
NCZ6007 FA
110
280
72
17
1.1
NCZ6207 FA
210
250
68
15
1
NCZ6008 FA
135
250
80
18
1.1
NCZ6208 FA
230
220
9.525 22.225
Pr = XFr + YFa
Outer ring Inner ring Ball
D
26
Dynamic equivalent load
Product Specifications
Radial Ball Bearings
3 - 15
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Available from stock
30 days after receiving an order
Bearing Numbering System
45 days after receiving an order
Determined after consultation on each inquiry
N C Z Basic bearing number F A
High corrosion resistance
ceramic bearing
Molded fluorocarbon resin cage
Applications
■ Aluminum film capacitor production facilities
57
58
CERAMIC BEARINGS AND
BEARINGS
2
Non-magnetic Hybrid Ceramic Bearing
Performance
This bearing uses non-magnetic stainless steel. It includes fluoropolymer as the lubricant. This
bearing can be used in a vacuum environment.
30
Applicable Environments
Clean
Magnetic field
Vacuum
Electric field
High speed
High temperature
● While steel bearings experience fluctuating
running torque, caused by magnetic fields,
this bearing rotates at a stable torque.
300
Ambient temperature, °C
300
200
100
0
Radial Ball Bearings
3
Running torque in a magnetic field
Steel bearing
10
Running torque, mN・m
3 - 16
Ambient temperature, °C
EXSEV Bearings and Other EXSEV Products
2
200
100
0
Non-magnetic Hybrid
Ceramic Bearing
1
0.5
-100
1
Corrosive
10
2
10
3
10
10
4
-100
10
5
Cleanliness, class
1
No magnetic field,
one cycle
–5
10
Ambient pressure, Pa
Dimensions Table
Product Specifications
Boundary dimensions
mm
Non-magnetic stainless steel
Bearing No.
B
d
r
Outer ring Inner ring
4
Ceramic (silicon nitride)
5
r
Ball
φD
φd
6
Fluorocarbon resin
7
Cage
8
9
Dynamic equivalent load
Pr = XFr + YFa
10
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
P0r = Fr
3NC
Hybrid ceramic bearing
YH4 FA
Molded fluorocarbon resin cage
Non-magnetic stainless steel
12
f0Fa
────
C0r
e
0.172
0.345
0.689
0.19
0.22
0.26
1.03
1.38
2.07
0.28
0.30
0.34
3.45
5.17
6.89
0.38
0.42
0.44
Fa
── ≦ e
Fr
X
1
Y
0
Fa
── ＞ e
Fr
X
Y
0.56
15
2.30
1.99
1.71
17
1.55
1.45
1.31
20
1.15
1.04
1.00
25
30
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Applications
Available from stock
■ Semiconductor manufacturing systems ■ Semiconductor inspection systems
■ Super conductivities related systems ■ Welding machines
59
■ Canning systems
35
30 days after receiving an order
45 days after receiving an order
Determined after consultation on each inquiry
40
B
r
(min.)
Permissible Limiting
radial load speed
min–1
N
12
4
0.2
3NC604YH4 FA
13
5
0.2
3NC624YH4 FA
10
1 000
14
5
0.2
3NC605YH4 FA
10
1 000
16
5
0.3
3NC625-5YH4 FA
15
1 000
17
6
0.3
3NC606YH4 FA
15
1 000
19
6
0.3
3NC626YH4 FA
20
1 000
19
6
0.3
3NC607YH4 FA
20
1 000
22
7
0.3
3NC627YH4 FA
25
1 000
22
7
0.3
3NC608YH4 FA
25
1 000
24
8
0.3
3NC628YH4 FA
25
1 000
24
7
0.3
3NC609YH4 FA
25
1 000
7.5
1 000
8
0.6
3NC629YH4 FA
35
970
7.142
0.5
3NCEE3SYH4 FA
35
1 000
26
8
0.3
3NC6000YH4 FA
35
1 000
30
9
0.6
3NC6200YH4 FA
50
860
28
8
0.3
3NC6001YH4 FA
40
830
32
10
0.6
3NC6201YH4 FA
70
770
32
9
0.3
3NC6002YH4 FA
45
660
35
11
0.6
3NC6202YH4 FA
75
610
35
10
0.3
3NC6003YH4 FA
50
580
40
12
0.6
3NC6203YH4 FA
95
530
42
12
0.6
3NC6004YH4 FA
70
500
47
14
1
3NC6204YH4 FA
130
450
47
12
0.6
3NC6005YH4 FA
75
400
52
15
1
3NC6205YH4 FA
140
360
55
13
1
3NC6006YH4 FA
95
330
62
16
1
3NC6206YH4 FA
195
300
62
14
1
3NC6007YH4 FA
110
280
72
17
1.1
3NC6207YH4 FA
210
250
68
15
1
3NC6008YH4 FA
135
250
80
18
1.1
3NC6208YH4 FA
230
220
9.525 22.225
Static equivalent load
Bearing Numbering System
D
26
(X and Y are as shown below.)
Basic bearing number
In magnetic field,
one cycle
60
CERAMIC BEARINGS AND
BEARINGS
2
Hybrid Ceramic Bearing
3
Radial Ball Bearings
3 - 17
Performance
This bearing is a standard hybrid ceramic bearing. Lubricated with grease or oil, it can be used
as an insulating bearing or high speed bearing.
● Reduced temperature rises.
● Reduced bearing vibration.
● Good antiseizure characteristics.
Applicable Environments
20
● Temperature: – 30 to 120˚C
● Ambient pressure: Atmospheric pressure
High temperature
High speed
0.4
0.4
Corrosive
10
Steel bearing
Steel bearing
0.2
Hybrid Ceramic Bearing
0.2
Hybrid Ceramic Bearing
Hybrid Ceramic Bearing
0
0
0
2
4
6
8
0
0
2
4
6
8
10
0
1
2
Time, ✕ 103 h
Rotational speed, min–1
Dimensions Table
Product Specifications
Bearing vibration, G
Electric field
Service life under slight lubrication
oil supply
Bearing vibration
Steel bearing
Magnetic field
Vacuum
Operationg temperature rise
Bearing vibration, G
Clean
Temperature rise, ˚C
EXSEV Bearings and Other EXSEV Products
2
3
4
5
Time, ✕ 103 h
Basic load ratings 1)
Factor
kN
Boundary dimensions
mm
Limiting speed
min–1
Bearing No.
High carbon chromium bearing steel
B
d
r
Outer ring Inner ring
Ceramic (silicon nitride)
4
Ball
φd
φD
(X and Y are as shown below.)
P0r = Fr
Bearing Numbering System
3NC
Basic bearing number
f0Fa
────
C0r
ZZ FG
Hybrid ceramic bearing
Fa
── ≦ e
Fr
e
X
0.172
0.345
0.689
0.19
0.22
0.26
1.03
1.38
2.07
0.28
0.30
0.34
3.45
5.17
6.89
0.38
0.42
0.44
1
Y
0
Fa
── ＞ e
Fr
X
Y
0.56
■ Motors
61
12.4
63 000
75 000
0.40
12.3
52 000
64 000
72 000
12.3
60 000
12.4
48 000
58 000
17
6
0.3
3NC606ZZC3 FG
1.95
0.60
12.2
51 000
61 000
19
6
0.3
3NC626ZZC3 FG
2.60
0.90
12.3
42 000
51 000
19
6
0.3
3NC607ZZC3 FG
2.60
0.90
12.3
48 000
56 000
22
7
0.3
3NC627ZZC3 FG
3.30
1.15
12.4
37 000
44 000
22
7
0.3
3NC608ZZC3 FG
3.30
1.15
12.4
40 000
49 000
24
8
0.3
3NC628ZZC3 FG
3.35
1.20
12.8
33 000
42 000
24
7
0.3
3NC609ZZC3 FG
3.35
1.20
12.8
39 000
48 000
26
8
0.6
3NC629ZZC3 FG
4.55
1.65
12.4
32 000
39 000
22.225
7.142
0.5
3NCEE3SZZC3 FG
3.35
1.20
12.8
39 000
48 000
10
26
8
0.3
3NC6000ZZC3 FG
4.55
1.65
12.3
37 000
43 000
30
9
0.6
3NC6200ZZC3 FG
5.10
2.05
13.2
28 000
34 000
12
28
8
0.3
3NC6001ZZC3 FG
5.10
2.05
13.2
32 000
38 000
32
10
0.6
3NC6201ZZC3 FG
6.80
2.60
12.3
26 000
32 000
15
32
9
0.3
3NC6002ZZC3 FG
5.60
2.40
13.9
27 000
32 000
35
11
0.6
3NC6202ZZC3 FG
7.65
3.15
13.2
24 000
28 000
35
10
0.3
3NC6003ZZC3 FG
6.00
2.75
14.4
25 000
30 000
40
12
0.6
3NC6203ZZC3 FG
9.55
4.10
13.2
20 000
25 000
42
12
0.6
3NC6004ZZC3 FG
9.40
4.30
13.9
20 000
25 000
47
14
1
3NC6204ZZC3 FG
12.8
5.65
13.2
18 000
20 000
47
12
0.6
3NC6005ZZC3 FG
10.1
4.95
14.5
18 000
21 000
52
15
1
3NC6205ZZC3 FG
14.0
6.70
13.9
15 000
18 000
55
13
1
3NC6006ZZC3 FG
13.2
7.00
14.7
15 000
18 000
62
16
1
3NC6206ZZC3 FG
19.5
9.60
13.9
13 000
15 000
62
14
1
3NC6007ZZC3 FG
15.9
8.75
14.9
13 000
15 000
72
17
1.1
3NC6207ZZC3 FG
25.7
13.9
11 000
13 000
68
15
1
3NC6008ZZC3 FG
16.7
9.80
15.2
12 000
14 000
80
18
1.1
3NC6208ZZC3 FG
29.1
15.2
14.0
9 900
12 000
17
25
1.15
1.04
1.00
30
Determined after consultation on each inquiry
0.30
1.30
0.55
1.55
1.45
1.31
45 days after receiving an order
0.97
3NC624ZZC3 FG
0.40
35
Available from stock
■ High speed stranding machine guide rollers
3NC604ZZC3 FG
0.2
1.75
20
30 days after receiving an order
0.2
1.30
2.30
1.99
1.71
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
Applications
4
5
3NC625-5ZZC3 FG
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
12
13
3NC605ZZC3 FG
9.525
Static equivalent load
Grease
Oil
lubrication lubrication
0.3
9
Pr = XFr + YFa
f0
0.2
Dynamic equivalent load
Shield
C0r
5
8
Austenitic stainless steel
Cr
5
7
Cage
r
(min.)
14
6
Reinforced polyamide resin
B
16
5
r
D
40
13.1
Note 1) The basic load ratings are those of the Hybrid Ceramic Bearing.
To calculate its dynamic equivalent radial load, multiply the C0r values in this table by 1.176.
62
CERAMIC BEARINGS AND
2
This bearing is based on the K series super thin section ball bearing, which is widely used in industrial
robots. Provided with some adaptations, this bearing is compatible with clean or vacuum environments.
It uses fluorinated grease as the standard lubricant.
4
K Series Full Complement Hybrid Ceramic Ball Bearings
4 K Series Full Complement Hybrid Ceramic Ball Bearing
Types and Dimension Series
Bearing type code
X
C
A
(Deep groove type) (Angular contact type) (4 point contact type)
Clean
Magnetic field
Vacuum
Electric field
High speed
High temperature
200
100
0
-30
-100
1
Corrosive
300
Ambient temperature, °C
300
10
102
103
104
Cleanliness, class
● The K series super thin section ball bearing is
available in three types: deep groove type,
angular contact type and four point contact type.
● The cross section can be selected from among
three sizes: 4.762, 6.35 and 7.938 (mm).
● For use in a clean or vacuum environment, the
angular contact type, which has stainless steel
balls and ceramic balls alternately, is available in
series.
Products not listed in the Dimensions Table are
available to order. Please consult JTEKT.
200
100
25
0
-30
-100
105
1
10–5
Ambient pressure, Pa
Dimension series
code
Applicable Environments
Ambient temperature, °C
B
B
B
Cross
sectional
dimension
B=E
mm
E
E
E
T
4.762
KTC
KTA
KTX
A
6.35
KAC
KAA
KAX
B
7.938
KBC
KBA
KBX
Bore dia.
mm
25.4,
38.1
50.8
to
88.9
Dimensions Table
Product Specifications
Outer ring Inner ring
Basic load ratings 1)
kN
Boundary dimensions
mm
Martensitic stainless steel
Bearing No.
Separator
B
r
r
Ceramic (silicon nitride)
uD
ud
Angular contact type
d
D
B
r
(min.)
25.4
34.925
4.762
0.4
38.1
47.625
4.762
0.4
50.8
63.5
6.35
66.675
63.5
76.2
79.375
76.2
88.9
92.075
88.9
101.6
104.775
Ball
Dynamic equivalent load
Cr
C0r
3NCKTA010VST-1
2.05
1.20
3NCKTA015VST-1
2.35
1.65
0.6
3NCKAA020VST-1
3.90
2.95
7.938
1
3NCKBA020VST-1
5.40
3.80
6.35
0.6
3NCKAA025VST-1
4.20
3.55
7.938
1
3NCKBA025VST-1
5.85
4.60
6.35
0.6
3NCKAA030VST-1
4.50
4.20
7.938
1
3NCKBA030VST-1
6.25
5.45
6.35
0.6
3NCKAA035VST-1
4.80
4.90
7.938
1
3NCKBA035VST-1
6.60
6.25
Note 1) The basic load ratings are those of bearing made from SUS440C.
Pr = XFr + YFa
(X and Y are as shown below.)
Static equivalent load
✽ Colors in the "Bearing No." column indicate the
classification of the periods for delivery as shown below.
P0r = 0.6Fr + 0.5Fa
When P0r is smaller than Fr .
Available from stock
P0r = Fr
Bearing Numbering System
3 N C Basic bearing number
Hybrid ceramic bearing
VST-1
Full complement type
Contact angle
30 days after receiving an order
f0Fa
────
C0r
e
30°
–
0.80
Single row or tandem mounting Back to back or face to face
Contact
angle
EXSEV Bearings and Other EXSEV Products
2
BEARINGS
Applications
■ Semiconductor manufacturing systems
63
30°
45 days after receiving an order
Determined after consultation on each inquiry
Fa
── ≦
Fr
e
X
Y
1
0
Fa
── ＞
Fr
e
X
Y
0.39 0.76
Fa
── ≦
Fr
X
1
e
Y
Fa
── ＞
Fr
X
e
Y
0.78 0.63 1.24
Single row or
Back to back or
tandem mounting face to face
X0
Y0
X0
Y0
0.5
0.33
1
0.66
■ LCD manufacturing systems
64
CERAMIC BEARINGS AND
5 Linear Motion Bearings
2
Linear Motion Ball Bearings for Use in Extreme Special Environments
5
Linear Motion Bearings
5-1
Performance
The linear motion ball bearings are a high
precision product that moves linearly in axial
directions while having rolling contact with the
shaft. Having balls, retainer and shields housed
in an external cylinder, this compact bearing
moves linearly without limit to the stroke distance.
80
Comparison in lubrication life
Test conditions
65
u10 ✕ u19 ✕ 29mm
Tested bearing
(bore dia. ✕ outside dia. ✕ width)
Life ratio
60
40
20
External cylinder
Balls
0
Retainer
1
4
No lubrication
MG Linear Motion
Ball Bearing
Ambience
Atmospheric air, class 10
Temperature
Room temp.
Load
50N
Speed
30mm/s
Clean Pro Linear
Motion Ball Bearing
Shield
Bearing Numbering System
Bearing Types
DL Linear Motion
Ball Bearing
Clean Pro Linear
Motion Ball Bearing
MG Linear Motion
Ball Bearing
MO Linear Motion Hybrid Ceramic Linear
Ball Bearing
Motion Ball Bearing
Martensitic
External cylinder
stainless steel
Martensitic stainless steel
Material
EXSEV Bearings and Other EXSEV Products
2
BEARINGS
Silicon nitride
Balls
Austenitic stainless steel
Retainer
stainless steel
KDL grease
Clean pro coating over the
Molybdenum disulfide coated
Silver ion plated balls
entire surface of all components
on the retainer surface
(Remark)
Remark) Hybrid Ceramic Linear Motion Ball Bearings with grease lubrication or with Clean Pro coating are also available.
Consult JTEKT regarding the applications of these bearings.
Applicable Environments
DL Linear Motion
Ball Bearing
Clean Pro Linear
Motion Ball Bearing
MG Linear Motion
Ball Bearing
Cleanliness
Class 100
Class 10
–
–
–
Temperature
˚C
– 30 to 200
– 100 to 200
– 200 to 300
– 100 to 300
– 30 to 300
Ambient pressure
Pa
Normal to 10–5
Normal to 10–5
10–3 to 10–10
Normal to 10–5
Normal pressure
65
: SV
: SE
Hybrid Ceramic
Bearing
: 3NC
mm series
: SDM
With round flange
: SDMF
SE SDM 10 OP ST5 MSA7
Code for
extreme special
environments
Series code
Bore dia.
Lubricant
code
Clean pro
Molybdenum disulfide
Silver
Stainless steel
code
: ST1
SUS440C External cylinder
components External cylinder and balls : ST5
Type code
Standard
Tandem type
Clearance adjustment type
Open type
With square flange
: SDMK
: PR12
: MSA7
: MG3
: No code
:W
: AJ
: OP
Note 1) This catalogue does not contain the dimensions tables of mm-series linear motion ball bearings (for Europe).
Contact JTEKT for the dimensions.
2) The clearance adjustment type (AJ) and open type (OP) are not compatible with tandem type and flanged type.
Precipitation hardened
stainless steel
Precipitation hardened stainless steel
Shields
Lubricant
Austenitic
Grease
Solid lubricant
MO Linear Motion Hybrid Ceramic Linear
Ball Bearing
Motion Ball Bearing
Bearing Mounting
1) Linear motion ball bearings are constructed not to allow rotary motion but
allow linear motion only.
These bearings should carry loads evenly throughout their entire stroke;
therefore, when the bearing is subjected to bending loads, mount two
bearings at a distance on a shaft, or use a tandem type linear motion ball
bearing.
2) When installing a linear motion bearing in a housing, press one end face
of the external cylinder into the housing, taking care not to push or hit the
shield, or insert the bearing softly using a jig as shown in the figure at
right. When inserting a shaft, check the shaft for burrs or indentations in
advance and insert it slowly so as not to deform the shaft. Chamfer the
shaft end faces.
3) To support linear motion bearings built in a single housing on a set of two
or more shafts, adjust the parallelism of the shafts while checking the
smooth motion of the bearings. Imperfectly paralleled shafts may disturb
smooth motion of the bearings or shorten their service life.
Jig for bearing installation in housing
φD
-0.2
-0.5
Jig
Housing
φd
-0.03
-0.06
Typical use on two shafts
Shafts
Housing
66
CERAMIC BEARINGS AND
BEARINGS
2
5
Dimensions Table
SDM Series
SDM..W series (Tandem type)
L
L
B
B
Standard
SDM
W
W
Clearance adjustment type
SDM..AJ
Open type
SDM..OP
φdr
φDφD1
h
h1
h
(degree)
C0
N
105
88
127
1.4
3
2
4
5 SDM 5
4
5
10
15
10.2
1.1
9.6
167
6 SDM 6
8.5
6
12
19
13.5
1.1
11.5
206
11
8
15
17
11.5
1.1
14.3
176
17
8
15
24
17.5
1.1
10 SDM10
36
10
19
29
18
12 SDM12
42
SDM12 AJ
0
1.3
–200
1.3
14.3
13 SDM13
49
SDM13 AJ
16 SDM16
76
SDM16 AJ
20 SDM20
5
41 SDM12 OP
48 SDM13 OP
3
75 SDM16 OP
98 SDM20 OP
4
21
37 13
23
58 16
28
100
SDM20 AJ
240
SDM25 AJ
237 SDM25 OP
203 25
30 SDM30
270
SDM30 AJ
262 SDM30 OP
228 30
SDM35 AJ
654
SDM40 AJ
50 SDM50
1 700
SDM50 AJ
1 680 SDM50 OP
1 420 50
60 SDM60
2 000
SDM60 AJ
1 980 SDM60 OP
1 650 60
67
6
420 SDM35 OP
79 20
425
40 SDM40
6
640 SDM40 OP
0
–9
546 40
0
–9
0
–11
0
–13
32
0
–10
40
0
–16
45
355 35
5
8
32 12
25 SDM25
35 SDM35
5
0
–8
10
C
N
69
4 SDM 4
4
7
Basic load
rating
3 SDM 3
4
W
φdr
φD φD1
Clearance
Standard
Open type (OP)
Boundary dimensions, mm
Shaft
adjustment type (AJ)
dia.
No.
No.
No.
Basic
Basic
Basic
Tolerance
Tolerance
Tolerance
Tolerance
dr
of Mass
of Mass
of Mass
dr
D
L
B
W D1
bearing
bearing
bearing
ball
ball
ball
g
g
g
mm
No.
No.
No.
µm
µm
µm
µm
rows
rows
rows
8 SDM 8
W
θ h1
h
8 SDM 8S
Linear Motion Bearings
EXSEV Bearings and Other EXSEV Products
2
52
0
–12
60
80
0
–15
90
0
–19
12
0
–120
0 22
30 –200 23
Shaft
dia. Basic bearing
dr
No.
Boundary dimensions, mm
Mass
g
mm
Basic load rating
Tolerance
dr
Tolerance
D
µm
L
µm
5
SDM 5W
11
5
10
206
6
SDM 6W
16
6
12
265
8
SDM 8W
31
8
15
216
10
SDM10W
62
10
274
392
12
SDM12W
80
12
21
372
549
13
SDM13W
90
13
23
0
–10
Tolerance
0
–11
0
–13
19
B
µm
W
D1
1.1
9.6
265
µm
C
N
C0
N
28
20.4
35
27
1.1
11.5
323
530
45
35
1.1
14.3
431
784
1 100
55
0
–16
Tolerance
0
–300
44
0
–300
412
1.3
18
588
57
46
1.3
20
813
1 570
61
46
1.3
22
813
1 570
2 350
20
1.5
8
80
510
784
16
SDM16W
145
16
28
70
53
1.6
27
1 230
32
23
1.3
22
1.5
9
80
510
784
20
SDM20W
180
20
32
80
61
1.6
30.5
1 400
2 740
37
26.5
1.6
27
1.5
11
80
774
1 180
25
SDM25W
440
25
112
82
1.85
38
1 560
3 140
42
30.5
1.6 30.5
1.5
11
60
882
1 370
30
SDM30W
480
30
45
123
89
1.85
43
2 490
5 490
59
41
1.85 38
2
12
50
980
1 570
35
SDM35W
795
35
52
135
99
2.1
49
2 650
6 270
64
44.5
1.85 43
2.5
15
50
1 570
2 740
40
SDM40W
1 170
40
2.1
57
3 430
8 040
50
SDM50W
3 100
50
70
2.5
17
50
1 670
3 140
80
49.5
2.1 49
0
0
60.5
2.1 57
–300
–300
100
74
2.6 76.5
3
20
50
2 160
4 020
3
25
50
3 820
7 940
3
30
50
4 700 10 000
0
110
–22
85
3.15 86.5
60
SDM60W
3 500
60
0
–12
0
–15
40
60
0
–19
0
–22
80
0
–20
90
0
–25
151
0
–400
121
0
–400
192
148
2.6
76.5
6 080
15 900
209
170
3.15
86.5
7 550
20 000
68
BEARINGS
2
5
SDMF series (with round flange)
SDMK series (with square flange)
SDMF..W series (tandem type, with round flange)
SDMK..W series (tandem type, with square flange)
With round flange
SDMF..W
Z
Z
φX
With round flange
SDMF
φY
With square flange
SDMK
4 - fitting holes
4 - fitting holes
φY
φX
4 - fitting holes
With square flange
SDMK..W
Dp
φDf
Dp
φdr
φdr
φDf
φD
φdr
4 - fitting holes
Dp
Dp
φD
Linear Motion Bearings
2
EXSEV Bearings and Other EXSEV Products
CERAMIC BEARINGS AND
φdr
K
K
t
L
Shaft
dia.
Basic
dr
bearing No.
Boundary dimensions, mm
Mass
g
mm
dr
Tolerance
D
µm
Tolerance
L
µm
Tolerance
Df
K
t
Dp
X
Y
Z
µm
Eccen- Square - Basic load rating
tricity ness
C
C0
(max.) (max.)
N
N
µm
µm
SDMF 6
SDMK 6
24
18
6
8
SDMF 8S
SDMK 8S
32
24
8
8
SDMF 8
SDMK 8
37
29
8
SDMF10
SDMK10
72
52
10
12
SDMF12
SDMK12
76
57
12
21
30
42
32
6
32
4.5
7.5
4.1
510
784
13
SDMF13
SDMK13
88
72
13
23
32
43
34
6
33
4.5
7.5
4.1
510
16
SDMF16
SDMK16
120
104
16
28
37
48
37
6
38
4.5
7.5
4.1
20
SDMF20
SDMK20
180
145
20
42
54
42
8
43
5.5
9
5.1
25
SDMF25
SDMK25
340
300
25
40
59
62
50
8
51
5.5
9
30
SDMF30
SDMK30
470
375
30
45
64
74
58
10
60
6.6
35
SDMF35
SDMK35
650
560
35
70
82
64
10
67
6.6
40
SDMF40
SDMK40
1 060
880
40
60
80
96
75
13
78
9
14
50
SDMF50
SDMK50
2 200
2 000
50
80
100
116
92
13
98
9
60
SDMF60
SDMK60
3 000
2 560
60
110
134
106
18
112
11
6
10
69
t
L
12
19
28
22
5
20
3.5
6
3.1
206
265
Shaft
dia.
Basic
dr
bearing No.
mm
6
0
–13
SDMF 6W
SDMK 6W
31
25
6
25
5
24
3.5
6
3.1
176
216
8
SDMF 8W
SDMK 8W
51
43
8
15
24
32
25
5
24
3.5
6
3.1
274
392
10
SDMF10W
SDMK10W
98
78
10
SDMF12W
SDMK12W
110
90
12
13
SDMF13W
SDMK13W
130
108
13
784
16
SDMF16W
SDMK16W
190
165
774
1 180
20
SDMF20W
SDMK20W
882
1 370
25
5.1
980
1 570
11
6.1
1 570
11
6.1
29
40
30
6
29
4.5
7.5
12
4.1
372
549
12
52
0
–12
0
–25
Dp
35
28
22
5
15
45
32
25
19
55
40
30
12
X
Y
Z
20
3.5
6
3.1
323
530
5
24
3.5
6
3.1
431
784
6
29
4.5
7.5
4.1
588
1 100
0
–10
15
6
32
4.5
7.5
4.1
813
1 570
23
61
43
34
6
33
4.5
7.5
4.1
813
1 570
16
28
70
48
37
6
38
4.5
7.5
4.1
1 230
2 350
260
225
20
32
80
54
42
8
43
5.5
9
5.1
1 400
2 740
SDMF25W
SDMK25W
540
500
25
112
62
50
8
51
5.5
9
5.1
1 560
3 140
30
SDMF30W
SDMK30W
680
590
30
45
123
74
58
10
60
6.6
11
6.1
2 490
5 490
2 740
35
SDMF35W
SDMK35W
1 020
930
35
52
135
82
64
10
67
6.6
11
6.1
2 650
6 270
1 670
3 140
40
SDMF40W
SDMK40W
1 570
1 380
40
151
96
75
13
78
9
14
8.1
3 430
8 040
8.1
2 160
4 020
50
SDMF50W
SDMK50W
3 600
3 400
50
192
116
92
13
98
9
14
8.1
6 080
15 900
14
8.1
3 820
7 940
60
SDMF60W
SDMK60W
4 500
4 060
60
209
134
106
18
112
11
17
11.1
7 550
20 000
17
11.1
4 700
10 000
15
20
25
15
20
25
21
15
32
0
–22
90
t
µm
42
± 300
0
–19
Tolerance
K
L
µm
57
0
–16
32
Tolerance
Df
D
Eccen- Square - Basic load rating
tricity ness
C
C0
(max.) (max.)
N
N
µm
µm
0
–13
32
12
Tolerance
µm
17
19
0
–15
dr
15
0
–9
0
–10
Boundary dimensions, mm
Mass
g
0
–16
0
–12
0
–15
40
60
0
–19
0
–22
80
0
–20
90
0
–25
± 300
20
25
30
20
25
30
70
CERAMIC BEARINGS AND
BEARINGS
2
5
Performance
The Linear Way Bearing Units have a slide
unit in which balls circulate, allowing the
slide unit to move linearly on the track rail
without limit. High precision linear motion
can be obtained easily by fixing the slide unit
and track rail with bolts.
Comparison in lubrication life
400
60
Life ratio
47
Track rail
40
18
20
Housing
1
0
Load dependency of lubrication life
300
Clean Pro Hybrid Ceramic
Linear Way Bearing Unit
200
Clean Pro
Linear Way Bearing Unit
100
0
No lubrication
Shield
Linear Motion Bearings
Linear Way Bearing Units for Use in Extreme Special Environments
Lubrication life, km
5-2
Clean Pro Linear
Way Bearing Unit
Clean Pro Hybrid Ceramic
Linear Way Bearing Unit
0
0.05
0.1
Load ratio, P/C
Balls
Slide unit
Bearing Types
Bearing Numbering System
DL Linear Way Bearing Unit
Clean Pro Linear Way
Bearing Unit
Hybrid Ceramic Linear Way
Bearing Unit
Housing
Martensitic stainless steel
Material
EXSEV Bearings and Other EXSEV Products
2
Track rail
Martensitic stainless steel
Silicon nitride
Balls
Austenitic stainless steel
Shields
Lubricant
KDL grease
Austenitic stainless steel
Clean pro coating over the entire
surface of all components
(Remark)
Code for
extreme special
environments
Grease
: SV
Solid lubricant
: SE
Hybrid Ceramic Bearing : 3NC
LWL
LWLC
LWLG
LWLF
LWLFC
LWLFG
LWES
LWESC
LWESG
LWHS
Series code
Size
Q'ty of slide units
Track rail length (240 mm)
SE LWLF 24 C2 R240
P PR
Grease code
KDL grease
：DL
Solid
lubricant code
Clean pro
：PR
Accuracy
code
Standard
High accuracy
：H
：P
Stainless
steel code
Series
LWL
LWLF
LWLC LWLFC
LWLG LWLFG
LWES LWHS
LWESC
LWESG
Code
No code
SL
Remark) Hybrid Ceramic Linear Way Bearing Unit with grease lubrication or with Clean Pro coating are also available.
Consult JTEKT regarding the use of these bearings.
Applicable Environments
DL Linear Way Bearing Unit
Clean Pro Linear Way
Bearing Unit
Hybrid Ceramic Linear Way
Bearing Unit
Cleanliness
Class 100
Class 10
–
Temperature
˚C
– 30 to 200
– 100 to 200
– 30 to 200
Ambient pressure
Pa
Normal to 10–5
Normal to 10–5
Normal pressure
71
72
CERAMIC BEARINGS AND
BEARINGS
2
Unit: mm
Type 1
LWL
LWLF
LWLC LWLFC
LWLG LWLFG
(Type 1)
LWES LWHS
LWESC
LWESG
(Type 2)
Tolerance of H
Variation of H 1)
± 0.020
0.015 max.
± 0.040
0.015 max.
Tolerance of N
Variation of N 1)
± 0.025
0.020 max.
± 0.050
0.020 max.
Fig. 5-1
Fig. 5-2
Type 2
C
Item
C
H
H
N
A
D
B
B
Degree of running parallelism of plane C to plane A
Degree of running parallelism of plane D to plane B
20
40
15
30
10
200
400
600
Mounting reference
plane of the bed
Fig. 5-4
Temporary fastening of the track rail
Slide unit
Mounting reference
plane of the track rail
20
Fig. 5-5
10
5
0
5
Note 1) The variation refers to the dimensional difference between the slide units built into the
same track rail.
Remark) The preload is null or negligible.
Parallelism, µm
D
N
A
3) After positioning the mounting reference plane of the track rail
correctly to the mounting reference plane of the bed,
temporarily fasten the track to the bed (Fig. 5-4). Then bring
the two planes into close contact, using a small vice or other
suitable tool. Tighten the bolts one by one to securely fasten
the drive side track rail to the bed (Fig. 5-5). The driven side
track rail of the Linear Way Bearing Unit should be kept
temporarily fastened.
Linear Motion Bearings
Accuracy (before surface treatment)
Parallelism, µm
EXSEV Bearings and Other EXSEV Products
2
800
0
500
Fig. 5-1 Running parallelism of Linear Way Bearing Unit
(Type 1)
1 000
1 500
2 000
2 500
3 000
Track rail length L, mm
Track rail length L, mm
Fig. 5-2 Running parallelism of Linear Way Bearing Unit
(Type 2)
4) After positioning the slide units of the linear way bearing unit to
the table, place the table carefully on the slide units and then
temporarily fasten them together. Then align the mounting
reference plane of the drive side slide units correctly with that
of the table and fasten them together. With one of the driven
side slide units positioned and fixed with respect to the moving
direction, leave the other slide unit loosely tightened.
Fastening of the drive side track rail
Table
Slide unit on the drive side
Bearing Mounting
Slide unit on the driven side
Bed
1) Do not change the factory assembled combination of the slide
units and track rail.
Handle the linear way bearing units carefully to keep them out
of oil stains and dust.
Fig. 5-6
5) Before securely fastening the temporarily fastened track rail on
the driven side, move the table and check that the motion is
smooth. Tighten the fastening bolt that has just been passed
over by the slide unit, thus fastening the track rail to the bed in
a step-by-step manner (Fig. 5-7).
Securely fasten the slide unit to the table, which has been kept
temporarily fastened.
2) Before installing a linear way bearing unit in a machine or
equipment, remove burrs and indentations from the contact
surface of both the machine and bearing unit. Also remove
dust, contamination and oil stains. Clean the recesses of the
mounting surface (Fig. 5-3).
Fig. 5-3
Fastening of the slide unit
Track rail on the drive side
Cleaning of the mounting surface
Track rail on the driven side
Fig. 5-7
73
Fastening of the driven side track rail
74
CERAMIC BEARINGS AND
BEARINGS
2
5
Dimensions Table
LWHS series
Linear Motion Bearings
EXSEV Bearings and Other EXSEV Products
2
LWES series
（L1）
W2
W4
L2
4 - M1 ✕ depth
W2
LWESC15 to 25
LWES 15 to 25 W4
LWESG15 to 25
L3
W3
W3
φd4
H
H
h
H4
H1
N
H1
φd3
W
E
LWESC30
LWES 30
LWESG30
E
F
N
W
（L1）
（L1）
L3
L3
W2
W4
L2
W3
2 - M1 ✕ depth
4 - M1 ✕ depth
φd4
L
H
h
H4
5
5
5
H1
N
φd3
W
LWES・LWESG
E
LWESC
E
F
L
Basic
No.
Mass (refer.) Dimensions of Rail
assembly
width
Slide Track
mm
mm
unit
rail
kg kg / m H H1 N
W
W2
LWHS 15
0.18
1.47
24
6
LWHS 20
0.36
2.56
30
7.5 12
LWHS 25
0.55
3.50
36
9
LWHS 30
1.00
4.82
42 10
9.5
Dimensions of slide unit
Dimensions of track rail
mm
mm
W3
W4
L1
L2
L3 M1 ✕ depth H4
d3
d4
h
E
F
6
Track rail
Max.
fastening
track rail
bolt
length
mm
L
(nominal)
Basic load
rating
Static bending
moment rating 1)
✕R
mm
C
N
C0
N
T0
N· m
Tx
N· m
99.2
577
TY
N· m
99.2
577
15
34
26
4
66
26 44.6 M4✕ 8
15
4.5
8
30
60
M4✕16
600
9 350
13 900
116
20
44
32
6
83
36 57.2 M5✕10
18
6
9.5 8.5 30
60
M5✕18
600
14 500
21 900
241
202
1 130
202
1 130
320
1 750
556
2 930
12.5
23
48
35
6.5
16
28
60
40 10
95
35 64.7 M6✕12
22
7
11
9
30
60
M6✕22
600
20 100
29 800
376
320
1 750
113
40 80.6 M8✕16
25
9
14
12
40
80
M8✕28
600
28 100
42 200
646
556
2 930
Note 1) The illustrations at right show the directions of the static bending moment ratings TO, TX, and TY.
Each of the upper values in the TX and TY columns shows the bending moment for a single slide
unit, and the lower value shows the bending moment for two slide units kept in close contact.
To
Tx
TY
Basic
No.
Mass (refer.) Dimensions of Rail
assembly
width
Slide Track
mm
mm
unit
rail
kg kg / m H H1 N
W
W2
Dimensions of slide unit
Dimensions of track rail
mm
mm
W3
W4
L3 M1 ✕ depth H4
L1
L2
41
–
57
26 38.4 M4✕ 7 14.5 3.6
LWESC15
0.09
LWES 15
0.14
LWESG15
0.18
70
LWESC20
0.15
47
–
LWES 20
0.25
LWESG20
0.33
82
45 59.9
LWESC25
0.26
59
–
LWES 25
0.42
83
35 56
LWESG25
0.55
102
LWESC30
0.46
68
–
LWES 30
0.78
97
40 64.8 M8✕12 25
LWESG30
1.13
1.57
2.28
3.09
5.09
24
28
33
5.8 9.5
6
7
42 10
11
12.5
16
15
20
23
28
34
42
48
60
26
32
35
4
5
6.5
40 10
d4
h
E
F
(nominal)
✕R
mm
Basic load
rating
C
N
C0
N
600
4 330
5 680
600
6 200
9 740
36 51.1
600
7 520
13 000
24.5
600
6 250
7 610
600
9 360
13 900
600
11 500
19 000
600
10 100
12 800
600
14 500
21 900
50 75
600
17 600
29 200
36
600
16 800
19 500
600
23 600
32 500
600
30 900
48 700
22.4
66.5 32 44
M5✕ 8 16
6
6.5 4.5
9.5 8.5
20
20
60
60
M3✕16
M5✕16
32
M6✕ 9 19
7
7
11
11
9
9
20
20
128.5 60 96.5
Note 1) The illustrations at right show the directions of the static bending moment ratings TO, TX, and TY.
Each of the upper values in the TX and TY columns shows the bending moment for a single slide
unit, and the lower value shows the bending moment for two slide units kept in close contact.
75
d3
Track rail
Max.
fastening
track rail
bolt
length
mm
L
To
60
80
M6✕20
M6✕25
Tx
Static bending
moment rating 1)
T0
N· m
Tx
N· m
22.1
45.4
155
59.8
77.9
346
103
104
553
32.6
81.8
244
99.2
150
582
178
204
952
74.5
159
498
202
272
1 130
348
362
1 810
134
298
887
340
497
1 990
730
745
3 810
TY
N· m
22.1
155
59.8
346
103
553
32.6
244
99.2
582
178
952
74.5
498
202
1 130
348
1 810
134
887
340
1 990
730
3 810
TY
76
BEARINGS
2
5
LWL series
Linear Motion Bearings
2
EXSEV Bearings and Other EXSEV Products
CERAMIC BEARINGS AND
LWLF series
（L1）
（L1）
L3
L3
4 - M1 ✕ depth
W4
W2
W3
N
W
L2
W2
φd4
W3
W4
LWLFC10 to 30
LWLF 10 to 30
LWLFG14 to 30
H
2 - M1 ✕ depth
H1
H
H4
H1
h
LWLFC 42
LWLF 42
LWLFG42
W
N
W4
W2
（L1）
W3
L3
φd4
2 - M1 ✕ depth
φd3
E
F
LWL5
LWLC
4 - M1 ✕ depth
（L1）
L3
L2
E
LWL7 to 20
LWLG H
L
H4
W5
W6
H1
h
N
LWLF10
LWLFC
φd3
W
E
F
LWLF14 to 42
LWLFG
E
L
Mass (refer.)
Basic
No.
Slide
unit
g
LWLC 5
Dimensions Rail
of assembly width
Track
rail
Dimensions of track rail
mm
mm
mm
mm
g / 100mm H
Dimensions of slide unit
H1
N
W
W2
W3
1
3.5
5
12
8
W4
3.4
12
6
L1
L2
L3 M1 ✕ depth H4
16
–
9.6
M2✕1.5
2
LWL 5
4.4
19
–
12.6
LWLC 7
7.1
19
–
9.6
22
8
1.5 5
7
17
12
2.5 23.5
8 14.3 M2✕2.5
LWL 7
10
LWLG 7
14
31
LWLC 9
11
21.5 –
35
10
2
5.5
9
20
15
2.5 30
LWLG 9
28
40.5 15 30.9
LWLC12
22
25
LWL 12
35
LWLG12
51
44
20 32
LWLC15
42
32
–
LWL 15
64
LWLG15
107
38
–
LWL 20
133
50
25 34.6
LWLG20
196
68
30 52.3
5
6
8
M3✕4
10
4.2 2.3
3.5
3.5
6
3.5
M4✕6
11
6
F
7.5 15
Max.
track
rail
mm
length
(nominal)
L
✕R
mm
Cross recessed
round head
screw
M2✕6
Hexagon
socket
7.5 15 head cap
bolt
M2✕6
Hexagon
socket
20 head cap
bolt
M3✕8
3.5 10
Hexagon
socket
6.5 4.5 12.5 25 head cap
bolt
M3✕8
Hexagon
socket
40 head cap
bolt
M3✕10
6.5 4.5 20
22.3
Note 1) The illustrations at right show the directions of the static bending moment ratings TO, TX, and TY.
Each of the upper values in the TX and TY columns shows the bending moment for a single slide
unit, and the lower value shows the bending moment for two slide units kept in close contact.
77
3.6 0.8
E
17.7
89
30
M3✕3
15 21.6 M3✕3.5
LWLC20
40
25
3.5 34
25 42.7
20
32
20
57
10
15
27
2.4
13
95
5
8.5
12
–
20 27.8
20
4
7.5
10 20.8
3.5 42
156
16
3
5
h
11.9
19
13
3.7 2.4
d4
12 21.6
LWL 9
65
d3
Track rail
fastening
bolt
Hexagon
socket
60 head cap
bolt
M5✕14
9.5 5.5 30
To
Basic load
rating
C
N
514
C0
N
Static bending
moment rating 1)
T0
N· m
872
2.3
210
300
600
600
600
600
612
1 130
3.0
856
1 180
4.3
1 200
1 960
7.2
1 510
2 750
10.0
1 070
1 540
7.2
1 610
2 860
13.3
2 080
4 180
19.4
2 000
2 470
15.3
2 960
4 450
27.6
3 780
6 430
39.9
3 120
4 040
31.1
4 390
6 730
51.8
5 750
10 100
77.7
4 070
5 490
56.0
5 830
9 420
96.1
7 350
Tx
13 300 136
TY
Tx
N· m
1.4
8.9
2.4
13.3
1.9
15.4
4.9
29.2
9.1
52.6
3.0
22.2
9.4
53.0
19.4
102
5.5
43.3
16.0
96.6
31.8
174
12.1
87.6
30.8
178
66.2
351
20.2
138
54.6
291
106
549
TY
N· m
1.2
7.4
2.0
11.2
1.6
12.9
4.1
24.5
7.7
44.1
2.5
18.6
7.9
44.5
16.3
85.6
4.7
36.3
13.4
81.1
26.7
146
10.2
73.5
25.9
149
55.6
294
16.9
116
45.8
244
88.9
461
Basic
No.
LWLFC10
Mass (refer.) Dimensions Rail
of assembly width
Slide Track
mm
mm
unit
rail
g
g / 100mm H H1 N
W
W2
Dimensions of track rail
mm
mm
W3
W4
13
2
5.9
28
LWLF 10
Dimensions of slide unit
6.5 1.5
3.5
10
17
7.5
LWLFC14
13
LWLF 14
21
LWLFG14
31
LWLFC18
26
54
9
2
5.5
14
25
19
21
LWLF 18
44
LWLFG18
61
LWLFC24
45
LWLF 24
76
LWLFG24
111
LWLFC30
70
LWLF 30
112
LWLFG30
170
LWLFC42
95
LWLF 42
140
LWLFG42
204
90
12
3
6
18
198
14
3
15 3
8
10
24
30
40
50
28
35
L2
20.5
–
L3 M1 ✕ depth H4 W5 W6 d3
d4
M2.5✕1.5 4
24.5
–
17.6
22.5
–
13
31.5 10 22
42
19 32.5
26.5
–
39
12 28.6
M3✕3
–
5.5 –
–
–
2.9 4.8 1.6 10
3.5 6
16.6
M3✕3
7
–
–
6
30.5
–
3.5 6.5 4.5 15
44
15 31
59
28 46.3
35.5
–
7.5 50
17.7
M3✕3.5 8
–
–
4.5 8
20.5
18 34.8 M4✕4.5 9
–
–
4.5 8
9
42
60
45
7.5 55
–
M4✕4.5 10
23 9.5 4.5 8
Hexagon
socket
head
30
cap bolt
M3✕8
Hexagon
socket
head
4.5 20 40
cap bolt
M4✕12
4.5 20
74.5 35 58.3
Note 1) The illustrations at right show the directions of the static bending moment ratings TO, TX, and TY.
Each of the upper values in the TX and TY columns shows the bending moment for a single slide
unit, and the lower value shows the bending moment for two slide units kept in close contact.
Cross recessed
round head
screw
M2.5✕7
Hexagon
socket
head
4.5 20 40
cap bolt
M4✕10
25.3
20 39
20
Hexagon
socket
head
3.2 15 30
cap bolt
M3✕8
3.5 50.5 24 40.4
41.5
16 4
E
13.6
68.5 35 53.8
294
h
4.5
30
23
139
3
L1
Track rail Max.
fastening track
bolt
rail
mm length
(nominal)
L
F
✕R
mm
To
Hexagon
socket
head
40
cap bolt
M4✕12
Tx
Basic load
rating
C
N
C0
N
643
1 220
760
1 570
1 120
1 770
1 580
2 940
2 040
4 320
1 360
2 200
2 010
3 960
2 500
5 500
2 500
3 460
3 780
6 430
4 870
9 400
3 460
4 710
5 230
8 750
6 730
12 800
4 450
6 280
6 150
10 200
7 910
14 900
300
300
600
600
600
600
Static bending
moment rating 1)
T0
Tx
TY
N· m N· m N· m
2.7
2.3
6.3
15.4
13.0
4.4
3.7
8.1
23.3
19.5
4.0
3.3
12.6
25.6
21.4
10.4
8.7
21.0
56.7
47.6
21.8
18.3
30.9
108
90.8
5.8
4.8
20.1
37.2
31.3
17.5
14.7
36.2
93.4
78.4
33.0
27.7
50.3
165
139
10.1
8.5
42.2
70.2
58.9
31.8
26.7
78.4
174
146
65.6
55.0
115
333
280
16.0
13.4
71.6
111
93.2
50.5
42.4
133
269
226
104
87.4
194
526
442
25.7
21.6
133
170
143
63.6
53.3
216
346
290
131
110
316
668
561
TY
78
CERAMIC BEARINGS AND
BEARINGS
2
Cross Roller Way Bearing Units for Use in Extreme Special Environments
The Cross Roller Way Bearing Unit is a linear
motion bearing unit consisting of two raceway
bases. Each base has one longitudinal plane cut
into a V shape, which serves as the rolling
surface. Two bases are in contact on each of the
other's V-cut surface, and cylindrical rollers with
a retainer are placed between the surfaces. Any
pair of adjacent cylindrical rollers is directed at
right angles to each other, thus enabling smooth
and extremely accurate linear motion.
5
Bearing Numbering System
Grease
Solid lubricant
: SV
: SE
Code for
extreme special
environments
Linear Motion Bearings
5-3
SE CRW 3−75 C20 SL SP PR
Series code
Diameter of rollers
Raceway base length
Q'ty of rollers per unit
Grease code
KDL grease
Solid
lubricant code
Clean pro
: PR
Molybdenum disulfide : MSA
Accuracy
code
Standard
Ultrahigh accuracy
: No code
: SP
Material code
Stainless steel
: SL
: DL
Note) This bearing number represents four raceway bases and two sets cylindrical rollers with retainer.
Raceway base
Accuracy (before surface treatment)
End screw
Raceway base
// 3/L
Bearing Types
DL Cross Roller Way
Bearing Unit
Clean Pro Cross Roller Way
Bearing Unit
MO Cross Roller Way
Bearing Unit
A
Parallelism3, µm
10
Cylindrical roller
Cylindrical rollers with retainer
Retainer
A
B
// 3/L
8
6
Ultrahigh accuracy class
2
0
B
Standard
4
200
400
600
800
1 000
1 200
Raceway base length L, mm
Raceway base
Material
EXSEV Bearings and Other EXSEV Products
2
Martensitic stainless steel
Cylindrical
rollers
Retainer
Bearing Mounting
Austenitic stainless steel
End screw
Lubricant
KDL grease
Clean pro coating over the entire
surface of all components
Molybdenum disulfide coating
on the raceway bases
Applicable Environments
79
Fig. 5-8 shows a typical mounting construction of the Cross Roller Way Bearing Unit. Mounting procedures are described on
the following page.
Table side
raceway base
DL Cross Roller Way
Bearing Unit
Clean Pro Cross Roller Way
Bearing Unit
MO Cross Roller Way
Bearing Unit
Cleanliness
Class 100
Class 10
–
Temperature
˚C
– 30 to 200
– 100 to 200
– 100 to 300
Ambient pressure
Pa
Normal to 10–5
Normal to 10–5
Normal to 10–5
Bed side
Bed side
raceway base raceway base
Preload
adjustment side
raceway base
Preload
adjustment screw
Mounting surface B
Fig. 5-8
Mounting surface A
Mounting surface A
Typical mounting of Cross Roller Way Bearing Unit
80
CERAMIC BEARINGS AND
BEARINGS
2
1) One package includes an entire set of the components of a
cross roller way bearing unit (four raceway bases and two sets
of cylindrical rollers with retainer). Take care not to mix the
components of a set not compatible with those of another set.
Treat cross roller way bearing units with extra care to keep
them free from oil stains or contamination.
2) Remove burrs, indentations and other irregularities from the
machine surface on which the cross roller way bearing unit is
to be mounted. Also clean off dust, contamination and oil
stains. Clean the recesses of the mounting surface as well.
Table side
raceway base
Preload
adjustment screw
Mounting surface B
(Fig. 5-8
3) Place the bed side raceway base and table side raceway base
correctly on the each mounting surface, and fasten the bases
temporarily by tightening the screws evenly.
While keeping the bed side raceway base in close contact with
surface A and the table side raceway base with surface B,
tighten the screws permanently to a specified torque (Fig. 5-9).
Table 5-1 shows the tightening torque for individual regular
screw sizes.
Table 5-1
Bed side
Bed side
raceway base raceway base
Preload
adjustment side
raceway base
Mounting surface A
Mounting surface A
Typical mounting of Cross Roller Way Bearing Unit)
Tightening torque
N·m
M2✕0.4
0.23
M3✕0.5
1.4
M4✕0.7
3.2
M5✕0.8
6.3
M6✕1
10.7
Remark) When screws of different sizes are used for on the table side and
bed side, tighten them by applying the torque for the smaller screws.
4) Retract the preload adjustment screw in advance. Place the
preload adjustment side raceway base into close contact with
the mounting surface, and tighten the screws temporarily by
applying light, even torque.
5
Fig. 5-10
Typical preload adjustment procedure
Table side raceway base
Surface B
Preload adjustment side raceway base
Screw tightening torque
Nominal screw size
6) Adjust the preload with the preload adjustment side raceway
base fastened temporarily.
Firstly adjust the preload adjustment screw at the center of the
raceway base length, and adjust the preload adjustment
screws on the lengths to both ends alternately. Adjust the
clearance on the side face of the table, and tighten the preload
adjustment screws one by one until the dial gauge indication
becomes stable (Fig. 5-10).
When the indication is stable, determine and record the
tightening torque of the preload adjustment screws. To adjust
the preload adjustment screws near both ends, stroke the table
slowly to check that cylindrical rollers are located at the preload
adjustment screw.
After these adjustments, the clearance will be entirely or
almost eliminated. However, at this point the preload is not yet
even. By repeating the same procedure, re-adjust all the
preload adjustment screws by applying the torque recorded.
Linear Motion Bearings
EXSEV Bearings and Other EXSEV Products
2
Preload adjustment screw
Fig. 5-9
Mounting of table side raceway base
7) When permanently fastening the preload adjustment side
raceway base, make sure the screws have already been lightly
tightened to even torque.
In the same manner as the preload adjustment screws were
tightened, firstly adjust the preload adjustment screw at the
center of the raceway base length, and adjust the preload
adjustment screws on the lengths to both ends alternately by
applying torque close to the specified torque.
To tighten the fastening screws near the ends, stroke the table
slowly to check that the cylindrical rollers are located at the
tightened screw position.
In the end, tighten all screws evenly and permanently by
applying specified torque. Move the table slowly through the
entire stroke and check that it moves smoothly without
producing noise.
Check the table upper surface and side faces with a dial gauge
to check running accuracy.
Fig. 5-11
Accuracy check after assembly
5) To assemble the table and bed, insert cylindrical rollers with
retainer carefully into the space between the table side
raceway base and bed side raceway base such that the rollers
will be located at the center of the raceway base length. Take
care not to deform the cage.
Fasten the end screws and end plates of the raceway bases,
press the entire table toward the preload adjustment screw
side, and tighten the screw for temporary adjustment until the
clearance of the raceways is almost entirely eliminated.
Slowly move the table for one entire stroke and adjust the
position of the cylindrical rollers with retainer to the center.
81
82
CERAMIC BEARINGS AND
BEARINGS
2
5
Dimensions Table
Linear Motion Bearings
EXSEV Bearings and Other EXSEV Products
2
L
CRW series
t
E
n×F
E
H
t
F
W
0
A −0.3
W
φd2
φd1
R
h
e
Mass (refer.)
Cylindrical
Raceway rollers
Basic No.
1)
base
with
2)
kg / m retainer
g
p
A
H
L ( n✕F )
CRW1 – 20
20 ( 1✕10)
– 30
30 ( 2✕10)
– 40
40 ( 3✕10)
– 50
0.12
0.38
Dimensions of cylindrical
rollers with retainer
mm
8.5
4
50 ( 4✕10)
E
Da
R
M
φDa
Z(Quantity of rollers)
Boundary dimensions
mm
g
Z
p
Basic load
rating
Mounting dimensions
mm
e
W
g
M
d1
d2
h
t
Cu 3)
N
C0u 3)
N
Allowable
load
Fu 3)
N
Mass (refer.)
Cylindrical
Raceway rollers
Basic No.
1)
base
with
2)
kg / m retainer
g
Z
73
10
–120
120 ( 2✕40)
101
14
–160
160 ( 3✕40)
136
19
25.5
8
31.5
10
H
E
Da
R
CRW4 – 80
A
L ( n✕F )
80 ( 1✕40)
5
16.5
Dimensions of cylindrical
rollers with retainer
mm
Boundary dimensions
mm
37.5
12
–200
200 ( 4✕40)
164
23
43.5
14
–240
240 ( 5✕40)
199
28
70 ( 6✕10)
52.5
17
–280
80 ( 7✕10)
61.5
20
–320
– 60
60 ( 5✕10)
– 70
– 80
5
1.5
3
2.25 3.9
1.8
M2 1.65 3
1.4
1.7
131
119
39.4
0.82
6.91
22
11
280 ( 6✕40)
20
4
227
32
320 ( 7✕40)
262
37
CRW2 – 30
30 ( 1✕15)
29.6
7
–360
360 ( 8✕40)
297
42
– 45
45 ( 2✕15)
41.6
10
–400
400 ( 9✕40)
325
46
– 60
60 ( 3✕15)
53.6
13
–440
440 (10✕40)
360
51
– 75
75 ( 4✕15)
65.6
16
–480
480 (11✕40)
388
55
90 ( 5✕15)
– 90
–105
0.24
0.98
12
6
105 ( 6✕15)
7.5 2
77.6
19
89.6
22
4
2.8
5.5
2.5
M3 2.55 4.4
2
1.5
305
292
97.3
CRW6 –100
100 ( 1✕50)
84
9
–150
150 ( 2✕50)
129
14
–120
120 ( 7✕15)
101.6
25
–200
200 ( 3✕50)
165
18
–135
135 ( 8✕15)
113.6
28
–250
250 ( 4✕50)
210
23
–150
150 ( 9✕15)
125.6
31
–300
–165
165 (10✕15)
137.6
34
–350
–180
180 (11✕15)
149.6
37
–400
400 ( 7✕50)
CRW3 – 50
50 ( 1✕25)
42
8
–450
– 75
75 ( 2✕25)
62
12
–500
–100
100 ( 3✕25)
82
16
–125
125 ( 4✕25)
102
20
–150
150 ( 5✕25)
122
24
–175
0.50
2.96
18
8
175 ( 6✕25)
12.5 3
142
28
162
32
–200
200 ( 7✕25)
–225
225 ( 8✕25)
182
36
–250
250 ( 9✕25)
202
40
–275
275 (10✕25)
222
44
–300
300 (11✕25)
242
48
5
3.5
8.3
3.5
M4 3.3
6
3.1
2
664
606
202
300 ( 5✕50)
246
27
282
31
327
36
450 ( 8✕50)
363
40
500 ( 9✕50)
408
45
–550
550 (10✕50)
444
49
–600
600 (11✕50)
489
54
1.57
20.3
31
15
350 ( 6✕50)
25
6
Basic load
rating
Mounting dimensions
mm
Allowable
load
Fu 3)
p
e
W
g
M
d1
d2
h
t
Cu 3)
N
7
5
10
4.5
M5
4.3
7.5
4.1
2
1 290
1 170
389
9
6
14
6
M6
5.3
9.5
5.2
3
2 680
2 290
764
C0u 3)
N
N
Notes 1) Mass per meter of raceway base length
2) Mass of an assembly of a cage and ten cylindrical rollers
3) Load per cylindrical roller
Notes 1) Mass per meter of raceway base length
2) Mass of an assembly of a cage and ten cylindrical rollers
3) Load per cylindrical roller
83
84
EXSEV Bearings and Other EXSEV Products
2
6
BEARINGS
Angular Contact Ball Bearings
The High Ability Angular Contact Ball Bearings
are optimized for the spindle of machine tools.
They have superior high speed performance and
rapid acceleration/deceleration, and are
especially excellent at ultrahigh speeds under
oil/air lubrication. They are superior in high
speed performance to conventional products
under grease lubrication as well.
For practical use of this type of bearings, refer
to JTEKT Catalogue CAT. NO. B2006E for High
Ability Angular Contact Ball Bearings.
2
6
Features
¡ 20 to 30% reduction in temperature increase
(compared with JTEKT's conventional products)
JTEKT has conducted various tests and analyses and developed elaborate machining techniques to improve the performance of bearings
used with machining tool spindles. The result is a substantial reduction in frictional heat generated in bearings rotating at a high speed.
¡ 1.2- to 1.5- fold increases in speed limits
(compared with JTEKT's conventional products)
Speed limits have been extended through re-designing for high-speed rotation and heat reduction. Use of ceramic balls as rolling elements
enables additional high-speed rotation.
¡ Improved high speed performance achieved by position preloading
Low increases in temperature during operation ensure reduced changes in preload. Preload can be given by position preloading even at high
speeds, which has been hitherto unavailable with conventional systems. The result is high-precision machining with stability.
¡ Conventional bearings easily replaced
Types and Applications
The High Ability Angular Contact Ball Bearings are classified as shown in Table 1, according to bearing construction and rolling element
material.
Select the optimal type best suited for your application needs.
Dimensions of High Ability bearings conform to ISO standards. Replacement of conventional bearings with High Ability bearings requires
minimal geometry changes of the present spindle or housing.
Bearing Numbering System
Table 1 Classification of High Ability Angular Contact Ball Bearings
Specifications
Type
Application
Bearing dimension series No.
Type R
10
19
Contact angle
15°
20°
3NC HA R 0 13 CA -5 DB CS5
Rolling element material
Clearance code
Steel or ceramic
High speed, high rigidity type
CY: Preload (negative clearance)
CS: Clearance
5: Clearance mean dimension in the unit of µm (5 µm)
Code of combination type
30°
Typical codes
Type C
10
19
15°
20°
Ceramic
High speed, high load rating type
Cage guiding code
–5 : Ball guide type
No code : Outer ring guide type
C : 15°
CA : 20°
Code of contact angle No code : 30°
Type D
10
20°
Ceramic
Ultrahigh speed, low noise type
For oil/air lubrication
Bore dia. number
Dimension series code
13 : 5 mm ✕ 13 = 65 mm (bearing bore diameter)
9 : Dimension series19
0 : Dimension series10
Type F
10
19
20°
Ceramic
Ultrahigh speed type
For oil/air lubrication
Type Codes R, C, D, or F: Please refer to the above table.
High Ability Angular Contact Ball Bearing Series
Hybrid Ceramic Bearing
85
86
High Ability Angular Contact Ball Bearings
CERAMIC BEARINGS AND
BEARINGS
Performance
High Ability Bearings demonstrate their utmost performance when two or more units are used together and a preload is provided by the
position preloading method. The following are the performance of these bearings preloaded by the position preloading method.
¡ High speed performance of Type R and Type C High Ability Bearings
Fig. 6-1 shows the relationship between rotational speed and bearing temperature rises of High Ability Bearings, in comparison with
conventional high precision bearings.
In either grease lubrication or oil/air lubrication, the High Ability Bearings are superior to conventional bearings, with lower temperature rise
and higher rotational speed limit.
Comparison with ceramic ball bearings
Comparison with steel ball bearings
(Bearing dimensions: u75 ✕ u115 ✕ 20 mm)
Outer ring temperature rise, ˚C
40
1.25
1.5
Preload: 980 N (position preloading)
Cooling: Jacket oil cooling
dmn [×106 ]
1.75
1.0
3NC HAC015C
30
Conventional
20
10
1.25
1.5
1.75
Preload: 150 N (position preloading)
10
12
14
Fig. 6-1
Conventional
20
12
14
16
18
Rotational speed
dmn [×106 ]
1.50
1.75
dmn [×106 ]
1.25
2.0
1.50
Preload: 150 N (position preloading)
Cooling: Jacket oil cooling
15
Conventional
Grease lubrication
3NC HAR013CA
10
5
0
Outer ring temperature rise, ˚C
20
Preload: 150 N (position preloading)
Cooling: Jacket oil cooling
15
Conventional
10
Grease lubrication
HAR013CA
5
inch
Nominal outside
diameter
mm
Nominal dimension
Mass 2)
(per piece)
mm
Precision
grade 1)
Mass 2)
(per piece)
0.866 mg
7/16
11.112 75
1.0
1.000 00
1.691 mg
15/32
11.906 25
1.2
1.200 00
2.922 mg
1/2
12.700 00
1.587 50
6.766 mg
17/32
13.493 75
4.2 g
2.320 8 g
5 and 10
2.854 5 g
3.46 g
2.000 00
13.530 mg
9/16
14.287 50
4.9 g
3/32
2.381 25
22.836 mg
19/32
15.081 25
5.8 g
7/64
2.778 12
36.262 mg
5/8
15.875 00
6.8 g
1/8
3.175 00
54.129 mg
3/4
19.050 00
11.7 g
3.500 00
72.511 mg
13/16
20.637 50
5/32
3.968 75
0.105 7 g
7/8
22.225 00
3/16
4.762 50
0.182 7 g
15/16
23.812 50
22.8 g
7/32
5.556 25
0.290 1 g
1
25.400 00
27.7 g
15/64
5.953 12
0.356 8 g
1 1/8
28.575 00
39.5 g
1/4
6.350 00
0.433 0 g
1 3/16
30.162 50
46.4 g
17/64
6.746 88
0.519 4 g
1 1/4
31.750 00
54.1 g
9/32
7.143 75
0.616 6 g
1 5/16
33.337 50
5/16
7.937 50
0.845 8 g
1 1/2
38.100 00
3.5
(Bearing dimensions: u65 ✕ u100 ✕ 18 mm)
Precision
grade 1)
0.800 00
20
22
[✕103 min–1 ]
Comparison with steel ball bearings
Nominal outside
diameter
mm
0.8
2.0
10
(Bearing dimensions: u65 ✕ u100 ✕ 18 mm)
inch
1/16
Comparison in bearing temperature rises under oil air lubrication
Comparison with ceramic ball bearings
20
Table of Dimensions and Masses
Nominal dimension
By using High Ability Bearings, it is possible to switch spindle lubrication from oil/air to grease.
The Type R High Ability Bearings having ceramic balls exhibit better high speed performance under grease lubrication than oil/air
lubricated conventional bearings.
1.25
7
mm
40
20
18
[✕103 min–1 ]
16
Rotational speed
1.0
JTEKT also supplies Ceramic Balls (silicon nitride),
which have excellent resistance to wear and seizure,
and are useful in corrosive environments and
ultrahigh vacuums. Other major features of these
balls are excellent heat resistance (up to 800˚C), high
rigidity, lightweight (40% compared to bearing steel),
non-magnetic, and have insulating characteristics.
The Ceramic Balls are useful in many applications
such as jigs, tools, gauges, solenoid valves, check
valves, other valve varieties, high grade bicycle
parts, automotive parts, and machine components.
HAR013CA
Cooling: Self-cooling
0
0
8
2
60
Outer ring temperature rise, ˚C
1.0
7 Ceramic Balls
(Bearing dimensions: u65 ✕ u100 ✕ 18 mm)
dmn [×106 ]
Outer ring temperature rise, ˚C
EXSEV Bearings and Other EXSEV Products
2
Ceramic Balls
CERAMIC BEARINGS AND
3 and 5
5
11/32
8.731 25
3/8
9.525 00
1.461 5 g
13/32
10.318 75
1.858 2 g
40
60
14.9 g
18.6 g
62.7 g
93.5 g
1.125 7 g
Notes 1) For the grades, those specified in JIS B 1501 shall apply.
2) The masses are calculated on the basis of 3.23 g/cm3 in density.
Numbering System
5/32 G5 NCR
0
10
14
18
Rotational speed
22
26
[×103 min–1 ]
10
12
14
Rotational speed
16
18
[×103 min–1 ]
Material code: silicon nitride ceramic
Precision grade code
Nominal dimension
Fig. 6-2
87
Comparison in high speed performance under grease lubrication
88
EXSEV Bearings and Other EXSEV Products
2
BEARINGS
8 Accuracy and Internal Clearance of Ceramic Bearings and
8-1
Bearings
Accuracy of Radial Ball Bearings
over
0.61)
up to
Single radial plane bore diameter variation
Vdp
Diameter series 7, 8, 9
class 0
class 0 class 6 class 5 class 0 class 6 class 5 class 0 class 6 class 5 class 0 class 6 class 5
upper
lower
upper
0
–8
0
2.5
Unit: µm
Single plane mean bore diameter deviation
3 dmp
class 6
class 5
lower
Clearance of Radial Ball Bearings
8-2
Table 8-1(1) Inner ring (bore diameter)
Nominal bore
diameter
d
mm
2
upper
lower
–7
0
–5
10
Mean bore diameter variation
Vdmp
Diameter series 2, 3, 4
Diameter series 0, 1
max.
max.
9
5
8
max.
7
4
6
5
Table 8-3 Radial internal clearance of deep groove ball bearings (cylindrical bore)
over
6
5
CN
C3
C4
C5
min.
max.
min.
max.
min.
max.
min.
6
2
13
8
23
14
29
20
37
2
13
8
23
14
29
20
37
up to
2.5
Unit: µm
Radial internal clearance
Nominal bore diameter
d, mm
max.
4
8
3
6
10
max.
10
0
–8
0
–7
0
–5
10
9
5
8
7
4
6
5
4
6
5
3
10
18
3
18
11
25
18
33
25
45
10
18
0
–8
0
–7
0
–5
10
9
5
8
7
4
6
5
4
6
5
3
18
24
5
20
13
28
20
36
28
48
18
30
0
– 10
0
–8
0
–6
13
10
6
10
8
5
8
6
5
8
6
3
24
30
5
20
13
28
23
41
30
53
30
50
0
– 12
0
– 10
0
–8
15
13
8
12
10
6
9
8
6
9
8
4
30
40
6
20
15
33
28
46
40
64
40
50
6
23
18
36
30
51
45
73
2.5
Note 1) Dimension 0.6 mm is included in this category.
Table 8-1(2) Inner ring (running accuracy and width)
Nominal bore
diameter
d
mm
over
0.61)
Radial runout of
assembled bearing
inner ring
Face runout
with bore
Face runout
with
receway
Kia
class 0 class 6 class 5
Sd
class 5
class 5
max.
max.
max.
7
7
0
– 40
up to
2.5
10
5
4
Unit: µm
Single inner ring width deviation
3 Bs
Sia2)
class 0
class 6
class 5
Single inner ring width deviation for
matched bearing
Inner ring
width variation
3 Bs3)
class 6
VBs
class 0 class 6 class 5
class 0
class 5
upper lower upper lower upper lower upper lower upper lower upper lower
0
– 40
–
– 40
–
–
–
0
–
– 250
Unit: µm
Nominal bore diameter
d, mm
over
max.
12
12
10
10
6
4
7
7
0
– 120
0
– 120
0
– 40
0
– 250
0
– 250
0
– 250
15
15
5
18
10
7
4
7
7
0
– 120
0
– 120
0
– 80
0
– 250
0
– 250
0
– 250
20
20
5
18
30
13
8
4
8
8
0
– 120
0
– 120
0
– 120
0
– 250
0
– 250
0
– 250
20
20
5
30
50
15
10
5
8
8
0
– 120
0
– 120
0
– 120
0
– 250
0
– 250
0
– 250
20
20
5
Amounts of clearance correction
Measuring load
N
18
2.51)
up to upper lower upper lower upper lower
24.5
4
4
4
4
49
5
6
6
6
M3
max.
max.
max.
6
0
– 8
0
– 7
0
–5
10
9
5
8
7
4
6
5
4
10
9
6
5
18
0
– 8
0
– 7
0
–5
10
9
5
8
7
4
6
5
4
10
9
6
5
3
18
30
0
– 9
0
– 8
0
–6
12
10
6
9
8
5
7
6
5
12
10
7
6
3
30
50
0
– 11
0
– 9
0
–7
14
11
7
11
9
5
8
7
5
16
13
8
7
4
50
80
0
– 13
0
– 11
0
–9
16
14
9
13
11
7
10
8
7
20
16
10
8
5
max.
min.
max.
min.
max.
min.
max.
10
8
13
13
20
20
28
Unit: µm
2.51)
6
max.
15
8
5
max.
max.
8
8
6
18
15
8
5
8
8
18
30
15
9
6
8
8
30
50
20
10
7
8
8
50
80
25
13
8
8
10
Notes 1) Dimension 2.5 mm is included in this category.
2) Applicable to deep groove ball bearings and angular contact ball bearings.
89
N
M3
M4
M5
M6
2.3
1
1
1
1
Remark) Miniature ball bearings: bearing with an outside diameter of less than 9 mm
Small size ball bearings: bearings with an outside diameter of 9 mm or over and a bore diameter of less than 10 mm
Remark) Consult JTEKT regarding the accuracy and internal clearance of inch series bearings (bearing basic number EE3S).
8-3
Unit: µm
Outer ring
Nominal outside Radial runout of assembled Variation of outside surface Assembled bearing outer ring Deviation of a single
bearing outer ring
generatrix inclination with face face runout with raceway
outer ring widht
width variation
diameter
2)
K
S
S
3
VCs
ea
D
ea
Cs
D
class 0 class 6 class 5
class 5
class 5
classes 0, 6 & 5 classes 0 & 6 class 5
mm
up to
Amounts of clearance correction
Accuracy and Internal Clearance of K Series Full Complement Hybrid Ceramic Ball Bearings
Table 8-5 Accuracy and internal clearance of K Series Full Complement Hybrid Ceramic Ball Bearings
Table 8-2(2) Outer ring (running accuracy and width)
over
M6
5
measuring load
3
Notes 1) Dimension 2.5 mm is included in this category.
2) Applicable when no snap ring is fitted.
Unit: µm
M5
Remark) When the above values are used as clearance measurements, the values should be corrected by adding the increase of the radial internal clearances caused by the
measuring load.
max.
6
M4
min.
Clearance
max.
C5
50
Nominal outside Single plane mean outside diameter deviation Single radial plane outside diameter variation VDp
Shielded/sealed type Mean outside diameter variation
diameter
Diameter series
3 Dmp
VDmp
Diameter series 7, 8, 9 Diameter series 0, 1 Diameter series 2, 3, 4 2, 3, 4 0, 1, 2, 3, 4
D
2)
2)
2)
2)
2)
2)
2)
2)
2)
mm
class 0
class 6
class 5 class 0 class 6 class 5 class 0 class 6 class 5 class 0 class 6 class 5 class 0 class 6
class 0 class 6 2) class 5
over
C4
18
Clearance code
Unit: µm
C3
Table 8-4 Radial internal clearance of extra small/miniature ball bearings
Notes 1) Dimension 0.6 mm is included in this category.
2) Applicable to deep groove ball bearings and angular contact ball bearings.
3) Applicable to bearing rings made for matched bearings.
Table 8-2(1) Outer ring (outside diameter)
CN
up to
2.5
5
10
2.5
Remark) When the above values are used as clearance measurements, the values should be corrected by adding the increase of the radial internal clearances caused by the
measuring load. The values to be added are shown below.
upper lower
Bore
diameter
No.
B
010
5
5
class K0
Single
inner(outer) ring
width deviation
3 Bs, 3 Cs
class K0
φD
φd
5
5
015
025
d : Nominal bearing bore diameter
D : Nominal bearing outside diameter
B : Nominal bearing width
0
–13
Outer ring, Kea
class K0
class K0
0
–20
Outer ring
0
–13
15
0
–127
class K0
20
Radial internal
clearance
Bore
diameter
No.
Deep
Four point
groove type contact type
25 to 41
25 to 38
010
30 to 46
30 to 43
015
10
10
13
Unit: µm
class K0
8
20
0
–15
Inner ring
class K0
13
0
–15
030
035
Inner ring, Kia
Sia, Sea
category 1 category 2 category 1 category 2
0
–10
020
6
Radial runout of assembled bearing, max.
class K0
category 1 category 2 category 1 category 2
max.
Same as the
allowable
Same as the
tolerance of 3 Bs value of VBs
for d of the same for d of the
bearing
same
bearing
Single plane mean Single plane mean
bore diameter
outside diameter
deviation 3 dmp
deviation 3 Dmp
13
25
Same as the
tolerance for
the radial
runout of the
inner ring
Same as the
tolerance for
the radial
runout of the
outer ring
020
30 to 61
30 to 56
025
030
15
25
15
30
Sia, Sea: Assembled bearing ring face runout with receway, max.
[Notes] Category 1 specifications are applied to deep groove ball bearings.
Category 2 specifications are applied to angular contact bearings and four point contact ball bearings.
41 to 71
41 to 66
035
90
Accuracy and Internal Clearance of Ceramic Bearings and EXSEV Bearings
CERAMIC BEARINGS AND
3
Application Examples
1 Clean Environments
2 Vacuum Environments
3 High Temperature Environments
4 Corrosive Environments
5 Magnetic Field Environments
6 Electric Field Environments
7 High Speed Applications
…………………………………………………………………………………
93
……………………………………………………………………………
97
……………………………………………
99
……………………………………………………………………
101
……………………………………………………
104
…………………………………………………………
105
…………………………………………………………………
107
CERAMIC BEARINGS AND
1 Clean Environments
3
1-1
Transfer Robot for Semiconductor
and LCD Production Facilities
For application in transfer robots for semiconductor and liquid
crystal production facilities, bearings are required to be low in
particle emissions and have a long service life.
Bearings may be delivered incorporated in arm units for
improved assemblability and maintainability.
Product: K Series Full Complement Hybrid
Ceramic Ball Bearing
■ Use conditions
Lubrication: Grease or clean pro coating
Temperature: Room temp. to 200˚C
Ambient pressure: 10–3 Pa
1-3
Chemical Vapor Deposition Equipment
Door Opening/Closing Mechanism
Full Complement Hybrid Ceramic Ball Bearings and Clean
Pro Linear Motion Ball Bearings are widely used for the doors of
the chemical vapor deposition (CVD) equipment.
● Applicable to high temperature, vacuum and
clean environments
Clean Environments
1
Application Examples
3
BEARINGS
Product: Full Complement Hybrid Ceramic
Ball Bearing
Clean Pro Linear Motion Ball Bearing
■ Use conditions
Rotational speed: 10 to 200 min–1
Lubrication: Clean pro coating
Temperature: 200˚C
Ambient pressure: Normal to 10–4 Pa
Linear motion
ball bearings
Motor
● Applicable to vacuum environments and clean
environments
● Optimal for machine size reduction
Full complement
ball bearing
Door
Bearing unit for application to transfer robots
Full complement ball bearing
1-2
Conveyor for Sputtering Equipment
Clean Pro Linear Motion Ball Bearings are widely used for the
conveyers in sputtering equipment.
Product: Clean Pro Linear Motion Ball Bearing
1-4
Chemical Vapor Deposition Machine
Clean Pro Cross Roller Way Bearing Units are widely used in
CVD machines due to their low gas and particle emissions.
■ Use conditions
Product: Clean Pro Cross Roller Way Bearing
Unit
■ Use conditions
Stroke: 20 mm
Stroke: 100 mm
Speed: 10 mm/s
Lubrication: Clean pro coating
Lubrication: Clean pro coating
Temperature: 200˚C
Ambient pressure: Normal to 10–3 Pa
Temperature: 200˚C
–5
Ambient pressure: Normal to 10
Deep groove
ball bearing
Pa
Wafer
● Applicable to vacuum environments and clean
environments
Linear motion
ball bearing
93
● Applicable to vacuum environments and clean
environments
94
CERAMIC BEARINGS AND
1 Clean Environments
3
1-5
Etching Machine
Bearings used in etching machines must be resistant to
halogen, hydrofluoric acid, and other corrosive gasses, as well
as low in particle emissions. To meet these requirements, PTFE
coated Hybrid Ceramic Bearings are used.
Product: Hybrid Ceramic Bearing
(with special features)
Load: Radial load of 10 N
Lubrication: PTFE coating
Temperature: Room temp. to 60˚C
Ambient pressure: Normal to 10
Product: Hybrid Ceramic Linear Motion Ball
Bearing
■ Use conditions
Stroke speed: 5 mm/s
Lubrication: Clean pro coating
Temperature: 200˚C
Ambient pressure: Normal pressure
Pa
Liquid crystal panel press jig
Preparatory
chamber
Reaction chamber
● Resistant to corrosive ambient gases such as
halogen and hydrofluoric acid
● Suitable for clean environments thanks to low
particle emissions
Liquid Crystal Panel Bonding Machine
Substrate bonding press jigs for use in furnaces must be low
in particle emissions and have a long service life under high
temperature conditions.
The Clean Pro Hybrid Ceramic Linear Motion Ball Bearings
are widely used for such jigs.
■ Use conditions
–2
1-7
Clean Environments
1
Application Examples
3
BEARINGS
Bearings
Arms
Door
1-6
Hard disk Sputtering Systems
Hard disk sputtering systems have a high temperature
vacuum conveyor, in which High temperature Clean Pro
Bearings are used.
Product: High temperature Clean Pro Bearing
■ Use conditions
Rotational speed: 60 min–1
Load: Radial load of 100 to 150 N
Lubrication: High temperature Clean pro coating
● Suitable for clean environments thanks to low
particle emissions
1-8
Wafer Transfer Device
For application in wafer transfer devices, bearings need not
only to be low in particle emissions but also resistant to corrosion
because of cleaning agent splashes.
For such devices, Clean Pro Hybrid Ceramic Linear Way
Bearing Units are widely used.
Ambient pressure: 10
Product: Hybrid Ceramic Linear Way Bearing
Unit (with special features)
■ Use conditions
Stroke speed: 350 mm/s
Lubrication: Clean pro coating
Temperature: Room temp.
Ambient pressure: Normal pressure
Temperature: Room temp. to 260˚C
–5
Linear motion
ball bearings
Liquid crystal panel
Pa
Idler
● Applicable to a clean environment under high
temperature and vacuum conditions
Driving pulley
Belt
Driven pulley
Bracket
Linear way bearing
Rail
● Suitable for clean environments thanks to low
particle emissions
● Corrosion resistant to cleaning agent splashes
95
96
CERAMIC BEARINGS AND
2 Vacuum Environments
3
2-1
Vacuum Evaporation Equipment
Bearings used in the planetary section of vacuum evaporation
equipment are required to be high in durability under high
temperatures, high load (moment) conditions. To ensure a long
bearing life under high temperature conditions, High temperature
Hybrid Ceramic Bearings with special features are used.
Product: High Temperature Hybrid Ceramic
Bearing (with special features)
■ Use conditions
–1
Rotational speed: 1 to 30 min
Lubrication: Molybdenum disulfide or silver
X-ray Tube
For rotational anode X-ray tubes, Full Complement Ball
Bearing Units, which integrate the flange and shaft.
These bearing units are required to be resistant to vacuum,
good high speed performance, heat resistant, and load capacity.
Temperature: 200 to 400˚C
–6
● Improved reliability in vacuum and
high temperature environments
2-3
Ambient pressure: 10
Vacuum Environments
2
Application Examples
3
BEARINGS
Product: Full Complement Ball Bearing Unit
■ Use conditions
Rotational speed: 3 000 to 10 000 min–1
Lubrication: Silver
Temperature: 250 to 500˚C
–8
to 10
Ambient pressure: 10–5 Pa
Pa
Hard glass bulb
Bearing unit
Vibration plate
mounting jig
2-2
Turbo Molecular Pump
Magnetic bearings are used in turbo molecular pumps driven
at extremely high speeds. To protect the blades from fracture in
case of a power failure or magnetic failure, touchdown bearing
units are used. As touchdown bearings, Full Complement
Ceramic Ball Bearings are used to increase the service life of the
touchdown bearings under severe hostile conditions.
Rotor
● Improved reliability in vacuum and
high temperature environments
Target
Electron gun
Product: Full Complement Ceramic Ball
Bearing (with special features)
■ Use conditions
Rotational speed: 20 000 to 60 000 min–1
Lubrication: Molybdenum disulfide or silver
Ambient pressure: 1 Pa
● Improved reliability in vacuum environments
97
98
CERAMIC BEARINGS AND
3 High Temperature Environments
3
3-1
Bogies in Furnaces
The bogies, conveyers and other carrier systems used in
furnaces are exposed to high temperatures.
Because of their high heat resistance, High Temperature
Hybrid Ceramic Bearings are used in such applications.
Product: High Temperature Hybrid Ceramic
Bearing
■ Use conditions
Rotational speed: 10 to 500 min
–1
Lubrication: Graphite
Temperature: 500˚C
3-3
Conveyers Inside Kilns
In the kiln that bakes Teflon resin onto the heat rollers of
copying machines, conveyor bearings must be low in particle
emissions under high temperatures. Because it is structurally
difficult to mount bearings accurately, High temperature Hybrid
Ceramic Bearings are used for this application, along with
aligning rings.
High Temperature Environments
3
Application Examples
3
BEARINGS
Product: High Temperature Hybrid Ceramic
Bearing
■ Use conditions
Rotational speed: 3 to 10 min–1
Lubrication: Graphite
Temperature: 400 to 500˚C
● Compatible with high temperature environments
● Applicable to high temperature environments
3-2
Corrugated Cardboard Production
Facilities
In corrugated cardboard production, polyethylene film, which
is attached to carton board in advance, is heat bonded by a gas
burner in the high temperature gas burner bonding process.
The PN Bearings, which have superior heat resistance, are
used to support the guide rollers of the belt that carries carton
board in this process, thus avoiding contaminating the carton
board with grease.
Product: PN Bearing
■ Use conditions
Rotational speed: 3 000 to 4 000 min–1
3-4
Guide Roller for Tube Annealing
Furnaces
The guide roll bearings installed inside tube annealing
furnaces are used under high temperatures without lubrication.
Hybrid Ceramic Bearings are suitable for such applications.
Lubrication: Molybdenum disulfide and other means
Temperature: 220˚C
Product: Hybrid Ceramic Bearing
■ Use conditions
Rotational speed: 300 min–1
Temperature: 300˚C
● Compatible with high temperature environments
Guide roller (ceramic)
Bearing
● Prevention of grease scattering
● Improved durability and reliability under high
temperatures
99
100
CERAMIC BEARINGS AND
4 Corrosive Environments
3
4-1
Synthetic Fiber
Manufacturing System
Acid solution, alkaline solution, water, and other liquids are
used in synthetic fiber yarn reinforcing processes. Corrosion
Resistant Hybrid Ceramic Bearings are applied in such corrosive
environments.
Product: Corrosion Resistant Hybrid Ceramic
Bearing
Aluminum Foil Electrolytic
Capacitor Production Facility
In an aluminum foil electrolytic capacitor production facility, a
strong acid solution is used to treat the aluminum foils.
High Corrosion Resistant Ceramic Bearings are widely used
in such highly corrosive environments.
■ Use conditions
Rotational speed: 20 to 100 min
4-3
–1
Lubrication: Chemical solution
Corrosive Environments
4
Application Examples
3
BEARINGS
Product: High Corrosion Resistant Ceramic
Bearing
■ Use conditions
Rotational speed: 50 min–1
Lubrication: Chemical solution
Temperature: Room temp. to 90°C
(hydrochloric acid and sulfuric acid)
● Corrosion resistance under acid solution, alkaline
solution and water
Temperature: 90°C
Yarn
Roller
Aluminum foil
Chemical
solution
Chemical solution
(Hydrochloric acid
or sulfuric acid)
● Corrosion resistance to strong acid solution
Roller
Roller
4-2
Centrifugal Blood Separator
Corrosion resistance is required of bearings to be used in
centrifugal blood separators especially to physiological saline.
Hybrid Ceramic Bearings with bearing rings coated with a
corrosion resistant film are suitable for such corrosive
environments.
Product: Hybrid Ceramic Bearing
(with special coating)
4-4
Liquid Crystal Polarizing Film
Production Facility
Liquid crystal polarizing film production facilities use acid
solution, alkaline solution, dying solution, distilled water, and
other solutions.
In such corrosive environments, Corrosion Resistant Hybrid
Ceramic Bearings are widely used.
■ Use conditions
Rotational speed: 20 000 min–1
Lubrication: Grease
Temperature: –10 to 10°C
Product: Corrosion Resistant Hybrid Ceramic
Bearing
■ Use conditions
Rotational speed: 80 min–1
Lubrication: Chemical solution
Temperature: Room temp. to 80°C
● Corrosion resistance to physiological saline
Supernatant
liquid
outlet
High
frequency motor
Shaft
Spherical plain
bearing
Ceramic
bearing
Rotor
Ball bearings
Film coil
Mechanical
seal
Ball bearing &
Spherical
plain bearing
Sample inlet
Film rewinding coil
Rotor
● Corrosion resistance to solutions such as acid
solution, alkaline solution, dying solution, and
distilled water
Chemical solution
Bearing mounted
section
Mechanical seal
101
102
CERAMIC BEARINGS AND
4 Corrosive Environments
5 Magnetic Field Environments
3
4-5
Wafer Cleaner Spin Dryer
In semiconductor wafer cleaning processes, wafers are cleaned in
cleansing chemicals, rinsing liquids, distilled water, and other liquids
before drying.
Because of their high corrosion resistance, Corrosion Resistant
Hybrid Ceramic Bearings are widely used in wafer cleaners.
Product: Corrosion Resistant Hybrid Ceramic
Bearing
5-1
Electron Beam Exposure Machine
The bearings in semiconductor production electron beam
exposure machines are exposed to strong magnetic fields.
Because of their non-magnetic characteristics, Ceramic
Bearings are used in such machines.
■ Use conditions
–1
Rotational speed: 2 000 to 3 000 min
Lubrication: Grease
Temperature: Room temp.
Magnetic Field Environments
5
Application Examples
3
BEARINGS
Product: Ceramic Bearing
■ Use conditions
Rotational speed: 100 min–1
Lubrication: Grease
Temperature: Room temp.
Ambient pressure: 10–5 Pa
Container
Bearing
Exhaust
Flywheel
HEPA filter
Flywheel
Container
Exhaust
● Compatible with vacuum, strong magnetic
field environments
● Corrosion resistance to solutions such as cleaning
chemicals, rinsing liquids, and distilled water
4-6
Chemical Mechanical Polishing
Process Cleaner
In the semiconductor multilayer production process, each
wafer surface should be treated to maintain evenness. This
process uses chemical mechanical polishing equipment, and the
cleaner attached to the equipment uses Corrosion Resistant
Ceramic Bearings.
Product: Corrosion Resistant Ceramic
Bearing
■ Use conditions
5-2
Ultrasonic Motor in Magnetic
Resonance Imagers
The motors installed in magnetic resonance imagers (MRI)
use magnetism insensitive Ceramic Bearings.
Product: Ceramic Bearing
■ Use conditions
Rotational speed: 100 min–1
Rotational speed: 500 min–1
Lubrication: Fluorine polymer
Lubrication: Grease
Temperature: Room temp.
Temperature: Room temp.
● Compatible with strong magnetic field
environments
● Corrosion resistance to corrosive solutions
103
104
CERAMIC BEARINGS AND
6 Electric Field Environments
3
6-1
Aerogenerator
Aerogenerators are strongly required to operate for extensive
periods of time without the need of maintenance. However,
bearings used in generators are subject to electrical pitting,
which may cause the bearings to break down.
Hybrid Ceramic Bearings, which have superior durability and
reliability, are widely used in such aerogenerators.
Product: Hybrid Ceramic Bearing
Motor
Bearings used in motors are susceptible to electrical pitting.
Hybrid Ceramic Bearings are widely used to prevent such pitting.
■ Use conditions
Rotational speed: 2 700 min
6-3
–1
Electric Field Environments
6
Application Examples
3
BEARINGS
Product: Hybrid Ceramic Bearing
■ Use conditions
Rotational speed: 5 000 min–1
Lubrication: Grease
Lubrication: Grease
Temperature: Below freezing point to approx. 60˚C
Temperature: –10 to 120˚C
Bearing location: Generators
● Prevention of electrical pitting
● Prevention of electrical pitting
● Extension of grease service life
(three times longer than Koyo steel bearings)
6-2
DVD Sputtering Machine
To improve reliability further, Hybrid Ceramic Bearings are
used.
Product: Hybrid Ceramic Bearing
■ Use conditions
Rotational speed: 300 min–1
Lubrication: Grease
● Insulation
Temperature: Room temp.
6-4
Photographic Film Production
Facilities
A photographic film production line treats film surfaces by
applying a high voltage.
Hybrid Ceramic Bearings are widely used in such
environments, because the ceramic inner ring and balls serve as
insulators.
Product: Hybrid Ceramic Bearing
(with special features)
■ Use conditions
Rotational speed: 200 min–1
Lubrication: Grease
Temperature: Room temp.
● Insulation under high voltage environments
High
voltage
105
106
CERAMIC BEARINGS AND
7 High Speed Applications
3
7-1
Turbocharger
Bearings that support the spindle of turbochargers should
have good acceleration response characteristics and high
durability under low viscosity, contaminated oil.
Because of their high reliability in these respects, Hybrid
Ceramic Bearings are widely used for this application.
Product: Hybrid Ceramic Bearing
■ Use conditions
–1
Rotational speed: 180 000 to 210 000 min
Spindle for Machine Tool
Machine tool spindle bearings are required to have superior
rotational performance at extremely high speeds, quick acceleration/
deceleration, high rigidity, and reduced temperature rises.
Hybrid Ceramic Bearings, which satisfy these requirements, are
widely used in this application.
● 20% to 30% reduction in temperature rises
● The upper limit of the rotational speed range is 1.2 to
1.5 times higher (compared with Koyo steel bearings).
107
Polygon Scanner Motor
Hybrid Ceramic Bearings, which exhibit superior high speed
performance, are widely used in high speed polygon scanner
motors.
Product: Hybrid Ceramic Bearing
■ Use conditions
Rotational speed: 26 000 min–1 or higher
Lubrication: Grease
Lubrication: Grease
Temperature: 350˚C
● Three times longer service life than that of
steel bearings
● Acceleration response up 20%
● An 80% reduction in oil supply
7-2
7-3
High Speed Applications
7
Application Examples
3
BEARINGS
● Excellent reliability in high speed rotation
Product: Hybrid Ceramic Bearing
(High Ability Angular Contact Ball Bearing)
■ Use conditions
Rotational speed: 25 000 min–1 (dmn = 2.75 ✕ 106)
7-4
Switched Reluctance Motor
For high speed, high efficiency switched reluctance (SR)
motors, which do not use coils or permanent magnets, Hybrid
Ceramic Bearings are applied.
Lubrication: Oil or grease
Product: Hybrid Ceramic Bearing
■ Use conditions
Rotational speed: 30 000 min–1
Lubrication: Grease
Spindle power: 75 kW
● Excellent reliability in high speed rotation
108
CERAMIC BEARINGS AND
7 High Speed Applications
3
7-5
Steel Wire Stranding Machine
Steel wires for radial tires are produced by stranding steel
wires to attain the required strength. In steel wire stranding
machines, which involve high speed rotation, Hybrid Ceramic
Bearings are used for improved service life and stability.
Product: Hybrid Ceramic Bearing
Rotational speed: 6 000 min
–1
Jet Electrostatic Coating Machine
In a jet electrostatic coating machine, grease may escape
from the spray nozzle due to the air motor, affecting the quality
of the paint to be coated.
To resolve this problem, Hybrid Ceramic Bearings that do not
use grease are used.
Product: Hybrid Ceramic Bearing
■ Use conditions
Rotational speed: 10 000 min–1
or higher
Lubrication: Grease
Lubrication: Oil or grease
Ball bearings
Spindle
Spindle
Wire stranding section
7-6
Inline Skates
Because of their low running torque and high durability, Hybrid
Ceramic Bearings are widely used in speed skates.
■ Use conditions
Ball bearings
● Reduced temperature rises
● Reliable durability
7-7
High Speed Applications
7
Application Examples
3
BEARINGS
Product: Hybrid Ceramic Bearing
■ Use conditions
Rotational speed: 20 000 min–1
Lubrication: Fluorine polymer
● Low torque and improved durability
7-8
Micro Gas Turbine Generator
The world's smallest gas turbine generators emit clean
exhaust emissions and hence are friendly to the environment.
Hybrid Ceramic Bearings are used in these generators because
they are low in vibration and noise generation, and have
excellent high speed performance.
Product: Hybrid Ceramic Bearing
■ Use conditions
Rotational speed: 100 000 min–1
(dmn = 2.22 ✕ 106)
Lubrication: Oil
Temperature: 200˚C
Turbine
Electrostatic
coating spray
nozzle
Generator rotor
Generator stator
Bell-like structure view
● Prevention of grease scattering
● Prevention of paint contamination
109
● Improved reliability in high speed rotation
Ball bearing
Ball bearing
110
CERAMIC BEARINGS AND
7 High Speed Applications
Application Examples
3
BEARINGS
7-9
Fuel Injection System Control Valve
The common rail system (fuel injection system), which enables
diesel engines to feature high power, good fuel economy and low
emissions, is equipped with Ceramic Balls in the control valves.
4
Product: Ceramic Ball
■ Use conditions
Maximum pressure: 135 MPa
● Compatible with high pressure fuel injection thanks
to improved wear resistance and seizure resistance
Ceramic ball
Solenoid valve
135 MPa
Nozzle
Injection
111
Supplementary
Tables
1 Shaft Tolerances
2 Housing Bore Tolerances
3 Numerical Values for Standard
.............................................................................................................................
113
..........................................................................................
115
Tolerance Grades IT
4 Steel Hardness Conversion
5 SI Units and Conversion Factors
6 Inch/millimeter Conversion
7 Cleanliness Classes
...............................................................................................................
117
..................................................................................
118
.............................................................
119
...................................................................................
123
..............................................................................................................
124
Supplementary Tables
4
BEARINGS
Supplementary table 1 Shaft tolerances (deviation from nominal dimensions)
Nominal shaft
diameter
Unit: µm
Nominal shaft
diameter
Deviation classes of shaft diameter
(mm)
over
(mm)
up to
3
6
6
10
10
18
18
30
30
50
50
80
80
120
180
250
315
400
500
630
120
180
250
315
400
500
630
800
800 1 000
d6
− 30
− 38
− 40
− 49
− 50
− 61
− 65
− 78
− 80
− 96
e6
− 20
− 28
− 25
− 34
− 32
− 43
− 40
− 53
− 50
− 66
−100
−
−119
−
−120
−
−142
−
f6
− 10
− 18
− 13
− 22
− 16
− 27
− 20
− 33
− 25
− 41
60
79
−
72
94
−
−
−
−145
−
85
−
−170
−110
−
−170
−100
−
−199
−129
−
−190
−110
−
−222
−142
−
−210
−125
−
−246
−161
−
−230
−135
−
−270
g5
−
−
−
−
−
−
−
−
−
−
30
49
−
36
58
−
43
68
50
79
−
−
−
−
−
−
56
88
−
62
98
−
−
−175
68
−108
−260
−145
−
−304
−
−
−
g6
4
9
5
11
6
14
7
16
9
20
−
10
23
−
12
27
−
14
32
15
35
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
17
40
−
18
43
−
20
47
−
−189
76
−120
−
−290
−160
−
−340
−210
80
−130
−
−320
−170
−
−376
−226
86
−142
−
−
−
−
−
−
−
−
−
−
4
12
5
14
6
17
7
20
9
25
10
29
12
34
14
39
15
44
17
49
18
54
20
60
h5
h6
−
0
5
0
6
0
8
0
9
−
0
11
−
0
13
−
0
15
−
−
−
0
18
−
0
20
−
−
0
23
−
0
25
−
0
27
22
66
−
24
74
−
26
82
−
−
0
11
0
13
0
16
h7
0
− 12
0
− 15
0
− 18
0
− 21
0
− 25
h8
0
− 18
0
− 22
0
− 27
0
− 33
0
− 39
h9
0
− 30
0
− 36
0
− 43
0
− 52
0
− 62
h10
0
− 48
0
− 58
0
− 70
0
− 84
0
−100
−
0
19
−
0
30
−
0
46
−
0
74
−
0
22
−
0
35
−
0
54
−
0
87
−
−
−
−
−
−
0
8
0
9
0
25
0
29
−
0
32
−
0
36
−
0
40
−
0
44
−
0
50
−
0
56
−
−
0
40
0
46
−
−
0
63
0
72
js5
js6
js7
±
2.5
±
4
±
6
±
3
±
4.5
±
7
±
4
±
5.5
±
9
±
4.5
±
6.5
±10
±
5.5
±
8
±12
0
−120
±
6.5
±
9.5
±15
0
−140
±
0
0
−100
−160
0
0
−115
−185
±
7.5
9
±10
−
0
52
−
0
81
0
−130
0
−210
±11.5
−
0
57
−
0
89
0
−140
0
−230
±12.5
−
0
63
−
0
97
0
−155
0
−250
±13.5
−
0
70
0
−110
0
−175
0
−280
−
−
0
80
0
−125
0
−200
0
−320
−
−
0
90
0
−140
0
−230
0
−360
−
±11
±12.5
±14.5
±16
±18
±20
±22
±25
±28
±17
±20
±23
±26
±28
±31
±35
±40
±45
j5
＋ 3
− 2
＋ 4
− 2
＋ 5
− 3
＋ 5
− 4
＋ 6
− 5
j6
＋ 6
− 2
＋ 7
− 2
＋ 8
− 3
＋ 9
− 4
＋11
− 5
k5
＋ 6
＋ 1
＋ 7
＋ 1
＋ 9
＋ 1
＋11
＋ 2
＋13
＋ 2
k6
＋ 9
＋ 1
＋10
＋ 1
＋12
＋ 1
＋15
＋ 2
＋18
＋ 2
k7
＋13
＋ 1
＋16
＋ 1
＋19
＋ 1
＋23
＋ 2
＋27
＋ 2
m5
＋ 9
＋ 4
＋12
＋ 6
＋15
＋ 7
＋17
＋ 8
＋20
＋ 9
m6
＋12
＋ 4
＋15
＋ 6
＋18
＋ 7
＋21
＋ 8
＋25
＋ 9
m7
＋ 16
＋ 4
＋ 21
＋ 6
＋ 25
＋ 7
＋ 29
＋ 8
＋ 34
＋ 9
n5
＋13
＋ 8
＋16
＋10
＋20
＋12
＋24
＋15
＋28
＋17
n6
＋ 16
＋ 8
＋ 19
＋ 10
＋ 23
＋ 12
＋ 28
＋ 15
＋ 33
＋ 17
6
7
＋12
＋15
＋21
＋32
＋24
＋30
＋
＋33
＋
2
＋11
＋11
＋
41
11
＋20
＋
6
9
＋13
＋38
＋28
＋35
＋
＋38
＋
3
＋13
＋13
＋
48
13
＋23
＋
＋
−
＋
−
−
−
7
9
＋
2
＋18
＋
3
7
＋14
＋21
−11
−11
＋
＋
3
7
＋16
＋24
−13
−13
＋
＋
7
−16
±16
7
−18
±18
7
−20
±20
−
−
＋
＋
＋
−
−
−
−
4
＋27
＋
4
＋29
＋
4
＋32
＋
5
−
−
−
2
＋
＋25
3
＋
＋28
3
＋
＋33
4
＋
＋36
4
＋
＋40
4
＋
＋45
5
＋
＋
＋
＋43
＋33
＋40
＋
3
＋15
＋15
＋
＋
＋50
＋37
＋46
＋
4
＋17
＋17
＋
＋
55
15
63
17
＋56
＋43
＋52
＋
4
＋20
＋20
＋
＋61
＋46
＋57
＋
4
＋21
＋21
＋
＋68
＋50
＋63
＋
5
＋23
＋23
＋
＋70
＋
＋26
＋
＋80
＋110
＋30
＋
＋90
＋124
＋34
＋
＋
＋
＋
＋44
＋70
0
0
＋50
＋80
0
0
＋56
＋90
0
0
−
−
−
＋45
＋
＋27
＋
＋51
＋
＋31
＋
72
20
＋57
＋
＋34
＋
78
21
＋62
＋
＋37
＋
86
23
＋67
＋
＋40
＋
96
26
30
34
−
−
−
p6
＋ 20
＋ 12
＋ 24
＋ 15
＋ 29
＋ 18
＋ 35
＋ 22
＋ 42
＋ 26
39
20
＋
45
23
＋
52
27
60
31
＋
＋
＋
＋
＋
＋
51
32
59
37
68
43
79
50
66
34
＋
73
37
＋
80
40
＋108
88
44
＋122
＋100
＋138
＋
＋
＋
50
＋
＋
＋
＋
＋
88
56
98
62
68
78
88
＋112
＋156
56
＋100
＋
r6
＋ 23
＋ 15
＋ 28
＋ 19
＋ 34
＋ 23
＋ 41
＋ 28
＋ 50
＋ 34
＋ 60
＋ 41
＋ 62
＋ 43
＋ 73
＋ 51
＋ 76
＋ 54
＋ 88
＋ 63
＋ 90
＋ 65
＋ 93
＋ 68
＋106
＋ 77
＋109
＋ 80
＋113
＋ 84
＋126
＋ 94
＋130
＋ 98
＋144
＋108
＋150
＋114
＋166
＋126
＋172
＋132
＋194
＋150
＋199
＋155
＋225
＋175
＋235
＋185
＋266
＋210
＋276
＋220
r7
＋ 27
＋ 15
＋ 34
＋ 19
＋ 41
＋ 23
＋ 49
＋ 28
＋ 59
＋ 34
＋ 71
＋ 41
＋ 73
＋ 43
＋ 86
＋ 51
＋ 89
＋ 54
＋103
＋ 63
＋105
＋ 65
＋108
＋ 68
＋123
＋ 77
＋126
＋ 80
＋130
＋ 84
＋146
＋ 94
＋150
＋ 98
＋165
＋108
＋171
＋114
＋189
＋126
＋195
＋132
＋220
＋150
＋225
＋155
＋255
＋175
＋265
＋185
＋300
＋210
＋310
＋220
over
up to
3
6
6
10
10
18
18
30
30
50
50
65
65
80
80
100
100
120
120
140
140
160
160
180
180
200
200
225
225
250
250
280
280
315
315
355
355
400
400
450
450
500
500
560
560
630
630
710
710
800
800
900
900 1 000
4
(Refer.)
3 dmp1) of
bearing
(class 0)
Shaft tolerances
CERAMIC BEARINGS AND
0
8
0
− 8
0
− 8
0
− 10
0
− 12
−
−
0
15
−
0
20
−
0
25
−
0
30
−
0
35
−
0
40
−
0
45
−
0
50
−
0
75
0
−100
Note 1) 3 dmp : single plane mean bore diameter deviation
113
114
Supplementary Tables
4
BEARINGS
Supplementary table 2 Housing bore tolerances (deviation from nominal dimensions)
Nominal bore
diameter
Unit: µm
Nominal bore
diameter
Deviation classes of housing bore diameter
(mm)
over
(mm)
up to
10
18
18
30
30
50
50
80
80
120
180
250
315
400
500
630
120
180
250
315
400
500
630
800
800 1 000
1 000
1 250
E6
＋ 43
＋ 32
＋ 53
＋ 40
＋ 66
＋ 50
＋
＋
＋
＋
F6
＋ 27
＋ 16
＋ 33
＋ 20
＋ 41
＋ 25
79
60
＋
94
72
＋
＋
＋
＋110
＋
85
＋
＋
＋129
＋
＋100
＋
＋142
＋
＋110
＋
＋161
＋
F7
＋ 34
＋ 16
＋ 41
＋ 20
＋ 50
＋ 25
49
30
＋
58
36
＋
68
43
79
50
＋
＋
＋
＋
＋
＋
G6
＋ 17
＋ 6
＋ 20
＋ 7
＋ 25
＋ 9
60
30
＋
71
36
＋
83
43
96
50
＋
＋
＋
＋
＋
＋
88
56
＋108
＋
56
＋
＋119
＋
＋125
＋
98
62
62
＋
＋175
＋108
＋131
＋
＋135
＋
68
＋
＋189
＋120
＋146
＋
＋145
＋
76
＋
＋210
＋130
＋160
＋
＋160
＋
80
＋
＋226
＋142
＋176
＋
＋170
＋
86
＋
＋261
＋164
＋203
＋
＋195
＋
98
＋
68
76
80
86
98
＋
＋
＋
＋
＋
＋
＋
G7
＋ 24
＋ 6
＋ 28
＋ 7
＋ 34
＋ 9
H6
＋11
0
＋13
0
＋16
0
H7
＋ 18
0
＋ 21
0
＋ 25
0
40
10
＋19
＋
47
12
＋22
29
10
＋
34
12
＋
39
14
44
15
＋
＋
＋
＋
＋
＋
49
17
＋
54
18
＋
60
20
＋
66
22
＋
54
14
61
15
0
0
＋25
＋29
75
18
＋36
83
20
＋40
92
22
＋44
74
24
＋104
＋50
82
26
＋116
94
28
＋133
＋
＋
＋
＋
＋
24
26
28
＋
0
＋32
＋
＋
0
69
17
＋
＋
H8
＋ 27
0
＋ 33
0
＋ 39
0
30
0
＋
35
0
＋
40
0
46
0
＋
＋
＋13
＋18
6
-12
87
0
＋140
＋16
＋22
6
-13
54
0
＋
63
0
72
0
0
0
＋100
＋160
0
0
＋115
＋185
0
0
89
0
＋140
＋230
0
0
97
0
＋155
＋250
0
0
70
0
＋110
＋175
＋280
0
0
0
80
0
＋125
＋200
＋320
0
0
0
90
0
＋140
＋230
＋360
0
0
0
＋66
＋105
＋165
＋260
＋420
0
0
0
0
0
0
＋
0
＋
0
＋56
0
＋
＋
＋120
＋
0
＋
63
0
74
0
46
0
0
0
＋
J7
＋10
- 8
＋12
- 9
＋14
-11
＋210
＋
57
0
J6
＋ 6
- 5
＋ 8
- 5
＋10
- 6
＋130
0
＋
H10
＋ 70
0
＋ 84
0
＋100
0
81
0
＋
52
0
H9
＋ 43
0
＋ 52
0
＋ 62
0
-
-
＋18
＋26
7
-14
-
＋22
＋30
7
-16
-
＋25
＋36
7
-16
＋29
＋39
7
-18
＋33
＋43
7
-20
-
-
-
−
−
−
−
−
−
−
−
JS5
JS6
JS7
±
4
±
5.5
±
±
4.5
±
6.5
±10
±
5.5
±
8
±12
±
6.5
±
9.5
±15
±
±
7.5
9
±10
±11.5
±12.5
±13.5
−
−
−
−
±11
±12.5
±14.5
±16
±18
±20
±22
±25
±28
±33
9
±17
±20
±23
±26
±28
±31
±35
±40
±45
±52
K5
＋ 2
- 6
＋ 1
- 8
＋ 2
- 9
K6
＋ 2
- 9
＋ 2
-11
＋ 3
-13
K7
＋ 6
- 12
＋ 6
- 15
＋ 7
- 18
M5
- 4
-12
- 5
-14
- 5
-16
M6
- 4
- 15
- 4
- 17
- 4
- 20
M7
0
- 18
0
- 21
0
- 25
N5
- 9
-17
-12
-21
-13
-24
N6
- 9
- 20
- 11
- 24
- 12
- 28
3
-10
＋
4
-15
＋
9
21
6
-19
-
5
24
-15
-
-
0
30
-28
-
2
-13
＋
4
-18
＋
10
25
8
-23
-18
-
-
0
35
-33
-
＋
＋
3
-15
＋
＋
2
-18
4
-21
＋
-
＋
2
-25
＋
−
−
−
−
-
＋
3
-22
＋
＋
5
＋
＋
-
-24
＋
3
-20
＋
-
5
-27
＋
7
-29
＋
8
-32
＋
12
28
13
33
-
-
9
-27
-
-
-
-
-11
-
-31
-
16
36
-13
-
-36
-
17
40
-14
-
-39
-
-16
-
-
18
45
-43
-
-
0
70
−
-
0
80
−
0
-56
-
0
90
−
0
-66
0
-105
−
0
-44
0
-50
-
-
6
28
8
33
8
37
9
41
10
46
10
50
-
-
0
40
0
46
-21
-
-39
-
-25
-
-45
-
-27
-
-
0
52
-50
-
-30
-
-
0
57
-55
-
-33
-
-
0
63
-60
-
26
70
-
26
96
−
30
80
30
-110
−
34
90
34
-124
−
40
-106
40
-145
−
-
-
-
-
-
16
38
20
45
22
51
-
-
-
26
62
-
27
67
-
44
88
9
39
-
10
45
-
12
52
14
60
-
-
-
-
17
80
-
-
36
61
41
70
-
-
-
24
59
28
68
33
79
45
-108
44
-114
78
-122
78
-148
50
-100
50
-130
88
-138
88
-168
56
-112
56
-146
-100
-100
-156
-190
66
-132
66
-171
-120
-120
-186
-225
-
-
30
52
-
21
51
55
95
-
16
73
-
-
-
-
26
45
51
87
-
14
66
P7
- 11
- 29
- 14
- 35
- 17
- 42
-
-
-
-
-
-
25
57
-
-
-
P6
- 15
- 26
- 18
- 31
- 21
- 37
47
79
-
-
14
33
N7
- 5
- 23
- 7
- 28
- 8
- 33
-
-
-
-
-
-
-
-
-
-
-
36
88
41
98
-
-
-
over
R7
- 16
10
- 34
- 20
18
- 41
- 25
30
- 50
- 30
50
- 60
- 32
65
- 62
- 38
80
- 73
- 41
100
- 76
- 48
120
- 88
- 50
140
- 90
- 53
160
- 93
- 60
180
-106
- 63
200
-109
- 67
225
-113
- 74
250
-126
- 78
280
-130
- 87
315
-144
- 93
355
-150
-103
400
-166
-109
450
-172
-150
500
-220
-155
560
-225
-175
630
-255
-185
710
-265
-210
800
-300
-220
900
-310
-250
1 000
-355
-260
1 120
-365
up to
18
30
50
4
(Refer.)
3 Dmp1) of
bearing
(class 0)
-
0
8
0
9
-
0
11
-
0
13
-
0
15
-
65
80
100
120
140
160
180
Housing bore tolerances
CERAMIC BEARINGS AND
(up to150)
-
0
18
(over 150)
-
0
25
-
0
30
-
0
35
-
0
40
-
0
45
-
0
50
-
0
75
200
225
250
280
315
355
400
450
500
560
630
710
800
900
1 000
1 120
1 250
0
-100
0
-125
Note 1) 3 Dmp : single plane mean outside diameter deviation
115
116
CERAMIC BEARINGS AND
BEARINGS
4
4
Basic size
(mm)
over
Supplementary table 4
Rockwell
Standard tolerance grades (IT)
1
2
3
4
5
6
7
8
9
10
11
12
13
Tolerances (µm)
up to
141） 151） 161） 171） 181）
Tolerances (mm)
−
3
0.8
1.2
2
3
4
6
10
14
25
40
60 0.10
0.14
0.26
0.40
0.60
1.00
1.40
3
6
1
1.5
2.5
4
5
8
12
18
30
48
75 0.12
0.18
0.30
0.48
0.75
1.20
1.80
6
10
1
1.5
2.5
4
6
9
15
22
36
58
90 0.15
0.22
0.36
0.58
0.90
1.50
2.20
10
18
1.2
2
3
5
8
11
18
27
43
70
110 0.18
0.27
0.43
0.70
1.10
1.80
2.70
18
30
1.5
2.5
4
6
9
13
21
33
52
84
130 0.21
0.33
0.52
0.84
1.30
2.10
3.30
30
50
1.5
2.5
4
7
11
16
25
39
62
100
160 0.25
0.39
0.62
1.00
1.60
2.50
3.90
50
80
2
3
5
8
13
19
30
46
74
120
190 0.30
0.46
0.74
1.20
1.90
3.00
4.60
80
120
2.5
4
6
10
15
22
35
54
87
140
220 0.35
0.54
0.87
1.40
2.20
3.50
5.40
120
180
3.5
5
8
12
18
25
40
63
100
160
250 0.40
0.63
1.00
1.60
2.50
4.00
6.30
180
250
4.5
7
10
14
20
29
46
72
115
185
290 0.46
0.72
1.15
1.85
2.90
4.60
7.20
250
315
6
8
12
16
23
32
52
81
130
210
320 0.52
0.81
1.30
2.10
3.20
5.20
8.10
315
400
7
9
13
18
25
36
57
89
140
230
360 0.57
0.89
1.40
2.30
3.60
5.70
8.90
400
500
8
10
15
20
27
40
63
97
155
250
400 0.63
0.97
1.55
2.50
4.00
6.30
9.70
500
630
−
−
−
−
−
44
70
110
175
280
440 0.70
1.10
1.75
2.80
4.40
7.00 11.00
630
800
−
−
−
−
−
50
80
125
200
320
500 0.80
1.25
2.00
3.20
5.00
8.00 12.50
800 1 000
−
−
−
−
−
56
90
140
230
360
560 0.90
1.40
2.30
3.60
5.60
9.00 14.00
1 000
1 250
−
−
−
−
−
66
105
165
260
420
660 1.05
1.65
2.60
4.20
6.60 10.50 16.50
1 250
1 600
−
−
−
−
−
78
125
195
310
500
780 1.25
1.95
3.10
5.00
7.80 12.50 19.50
1 600
2 000
−
−
−
−
−
92
150
230
370
600
920 1.50
2.30
3.70
6.00
9.20 15.00 23.00
2 000
2 500
−
−
−
−
−
110
175
280
440
700
1 100 1.75
2.80
4.40
7.00 11.00 17.50 28.00
2 500
3 150
−
−
−
−
−
135
210
330
540
860
1 350 2.10
3.30
5.40
8.60 13.50 21.00 33.00
Note 1) Standard tolerance grades IT 14 to IT 18 (incl.) shall not be used for basic sizes less than or equal to 1 mm.
117
Steel hardness conversion
Brinell
C-scale
1471.0 N
Vicker's
68
67
66
940
900
865
65
64
63
62
61
832
800
772
746
720
60
59
58
57
56
697
674
653
633
613
55
54
53
52
51
595
577
560
544
528
50
49
48
47
46
513
498
484
471
458
45
44
43
42
41
446
434
423
412
402
40
39
38
37
36
Rockwell
Tungsten
carbide ball
Standard ball
A-scale
588.4 N
B-scale
980.7 N
Numerical values for standard tolerance grades IT and Steel hardness conversion
Supplementary Tables
Supplementary table 3 Numerical values for standard tolerance grades IT
Shore
85.6
85.0
84.5
97
95
92
739
722
705
688
670
83.9
83.4
82.8
82.3
81.8
91
88
87
85
83
654
634
615
595
577
81.2
80.7
80.1
79.6
79.0
81
80
78
76
75
−
−
−
500
487
560
543
525
512
496
78.5
78.0
77.4
76.8
76.3
74
72
71
69
68
475
464
451
442
432
481
469
455
443
432
75.9
75.2
74.7
74.1
73.6
67
66
64
63
62
421
409
400
390
381
73.1
72.5
72.0
71.5
70.9
60
58
57
56
55
392
382
372
363
354
371
362
353
344
336
70.4
69.9
69.4
68.9
68.4
−
−
−
−
（109.0）
54
52
51
50
49
35
34
33
32
31
345
336
327
318
310
327
319
311
301
294
67.9
67.4
66.8
66.3
65.8
（108.5）
（108.0）
（107.5）
（107.0）
（106.0）
48
47
46
44
43
30
29
28
27
26
302
294
286
279
272
286
279
271
264
258
65.3
64.7
64.3
63.8
63.3
（105.5）
（104.5）
（104.0）
（103.0）
（102.5）
42
41
41
40
38
25
24
23
22
21
266
260
254
248
243
253
247
243
237
231
62.8
62.4
62.0
61.5
61.0
（101.5）
（101.0）
100.0
99.0
98.5
38
37
36
35
35
20
（18）
（16）
（14）
（12）
238
230
222
213
204
226
219
212
203
194
60.5
−
−
−
−
97.8
96.7
95.5
93.9
92.3
34
33
32
31
29
（10）
（ 8）
（ 6）
（ 4）
（ 2）
（ 0）
196
188
180
173
166
160
187
179
171
165
158
152
90.7
89.5
87.1
85.5
83.5
81.7
28
27
26
25
24
24
118
CERAMIC BEARINGS AND
BEARINGS
4
4
SI units
Angle
rad
[radian(s)]
°[degree(s)]
′[minute(s)]
″[second(s)]
Length
m
[meter(s)]
Å
Area
Volume
Time
m2
m3
s
[second(s)]
Angular
velocity
rad/s
Velocity
m/s
Acceleration
m/s2
Frequency
Hz
[hertz]
Rotation
s −1
frequency
Mass
Note 1)
119
Other Units 1)
Mass
kg
[kilogram(s)]
Supplementary table 5(2)
Conversion into SI units
✽
✽
✽
Conversion from SI units
SI units and conversion factors
Mass
SI units
1°＝π/180 rad
1′＝π/10 800 rad
1″＝π/648 000 rad
1 rad＝57.295 78°
Density
kg/m3
1Å＝10−10 m＝0.1 nm＝100pm
1 µ ＝1 µ m
1 in＝25.4 mm
1 ft＝12 in＝0.304 8 m
1 yd＝3 ft＝0.914 4 m
1 mile＝5 280 ft=1 609.344 m
1 m＝1010 Å
Linear
density
kg/m
[Angstrom unit]
µ
[micron(s)]
in [inch(es)]
ft [foot(feet)]
yd [yard(s)]
mile [mile(s)]
Momentum
kg・m/s
a [are(s)]
ha [hectare(s)]
acre [acre(s)]
1 a＝100m2
1 ha＝104 m2
1 acre＝4 840 yd2＝4 046.86 m2
1 km2＝247.1 acre
r, L [liter(s)]
✽
cc [cubic centimeters]
gal (US) [gallon(s)]
floz (US) [fluid ounce(s)]
barrel (US) [barrels(US)]
1r＝1 dm3＝10−3 m3
1 cc＝1 cm3＝10−6 m3
1 gal (US)＝231 in3＝3.785 41 dm3
1 floz (US)＝29.573 5 cm3
1 barrel (US)＝158.987 dm3
1 m3＝103r
1 m3＝106 cc
1 m3＝264.17 gal
1 m3＝33 814 floz
1 m3＝6.289 8 barrel
min [minute(s)]
h [hour(s)]
d [day(s)]
1 m＝39.37 in
1 m＝3.280 8 ft
1 m＝1.093 6 yd
1 km＝0.621 4 mile
kg・m2/s
Moment of
inertia
kg・m2
Force
N
[newton(s)]
1 kn＝1 852 m/h
1 km/h＝0.539 96 kn
1 G＝9.806 65 m/s2
1 m/s2＝0.101 97 G
c/s [cycle(s)/second]
1 c/s＝1 s
rpm [revolutions per minute]
min−1
✽
r/min
1 rpm＝1/60 s−1
t
lb
gr
oz
ton
ton
car
[ton(s)]
[pound(s)]
[grain(s)]
[ounce(s)]
(UK) [ton(s) (UK)]
(US) [ton(s) (US)]
[carat(s)]
✽ : Unit can be used as an SI unit.
No asterisk : Unit cannot be used.
N・m
[Newton
meter(s)]
✽
−1＝1
✽
Pressure,
Normal
stress
Hz
1 t＝103 kg
1 lb＝0.453 592 37 kg
1 gr＝64.798 91 mg
1 oz＝1/16 lb＝28.349 5 g
1 ton (UK)＝1 016.05 kg
1 ton (US)＝907.185 kg
1 car＝200 mg
Conversion from SI units
Angular
momentum
✽
✽
✽
G
Conversion into SI units
Moment of
momentum,
Moment of
force
kn [knot(s)]
m/h
Other Units 1)
SI units and conversion factors
Supplementary Tables
Supplementary table 5(1) SI units and conversion factors
1 s−1＝60 rpm
dyn
kgf
gf
tf
lbf
[dyne(s)]
[kilogram-force]
[gram-force]
[ton-force]
[pound-force]
gf・cm
kgf・cm
kgf・m
tf・m
ft・lbf
Viscosity
1 gf・cm
1 kgf・cm
1 kgf・m
1 tf・m
1 ft・lbf
65×10−5 N・m
＝9.806 65×10−2 N・m
＝9.806 65 N・m
＝9.806 65×103 N・m
＝1.355 82 N・m
1 gf/ cm2 ＝9.806 65×10 Pa
1 kgf/mm2 ＝9.806 65×106 Pa
1 kgf/m2 ＝9.806 65 Pa
＝6 894.76 Pa
1 lbf/in2
1 bar＝105 Pa
1 at＝1 kgf/cm2＝9.806 65×104 Pa
1 mH2O＝9.806 65×103 Pa
1 atm ＝101 325 Pa
mHg [meter mercury column]
101 325
Pa
0.76
1 Torr ＝1 mmHg＝133.322 Pa
Pa・s
P [poise]
[pascal second] kgf・s/m2
Kinematic
viscosity
m2/s
Surface
tension
N/m
St [stokes]
1 mHg
1 N＝105 dyn
1 N＝0.101 97 kgf
1 N＝0.224 809 lbf
＝9.806
Pa
gf/ cm2
[Pascal(s)]
kgf/mm2
2
{1 Pa＝1 N/m } kgf/m2
lbf/in2
bar [bar(s)]
at [engineering air pressure]
mH2O, mAq [meter water column]
atm [atmosphere]
Torr [torr]
1kg＝2.204 6 lb
1 g＝15.432 4 gr
1kg＝35.274 0 oz
1 t＝0.984 2 ton (UK)
1 t＝1.102 3 ton (US)
1 g＝5 car
1 dyn ＝10−5 N
1 kgf ＝9.806 65 N
1 gf ＝9.806 65×10−3 N
1 tf ＝9.806 65×103 N
1 lbf ＝4.448 22 N
1 N・m＝0.101 97 kgf・m
1 N・m＝0.737 56 ft・lbf
1 MPa
1 Pa
1 Pa
1 Pa
97 kgf/mm2
＝0.101 97 kgf/m2
＝0.145×10−3 lbf/in2
＝10−2 mbar
＝0.101
＝
10−2 P＝1 cP＝1 mPa・s
1 kgf・s/m2＝9.806 65 Pa・s
1 Pa＝7.500 6×10−3 Torr
1 Pa・s＝0.101 97 kgf・s/m2
10−2 St＝1 cSt＝1 mm2/s
120
CERAMIC BEARINGS AND
BEARINGS
4
4
Mass
SI units
Work,
Energy
J
[joule(s)]
{1 J＝1 N・m}
Power
W
[watt(s)]
{1 W＝1 J/s}
Other Units 1)
eV [electron volt(s)]
erg [erg(s)]
kgf・m
ft・lbf
Conversion into SI units
✽
erg/s [ergs per second]
kgf・m/s
PS [French horse-power]
HP [horse-power (British)]
ft・lbf/s
Thermo-dynamic
temperature
Celsius
temperature
Supplementary table 5(4)
Conversion from SI units
1 eV＝(1.602 189 2±
0.000 004 6)×10−19 J
1 erg＝10−7 J
1 kgf・m ＝9.806 65 J
1 ft・lbf ＝1.355 82 J
1 J＝107 erg
1 J＝0.101 97 kgf・m
1 J＝0.737 56 ft・lbf
＝10−7
1 erg/s
W
1 kgf・m/s＝9.806 65 W
1 PS＝75 kgf・m/s＝735.5 W
1 HP＝550 ft・lbf/s＝745.7 W
1 ft・lbf/s＝1.355 82 W
1 W＝0.101 97 kgf・m/s
1 W＝0.001 36 PS
1 W＝0.001 34 HP
℃
[Celsius(s)]
˚F [degree(s) Fahrenheit]
t°
F＝
5
(t−32)℃
9
t℃＝(
K −1
Heat
J
[joule(s)]
{1 J＝1 N・m}
121
Electric
current
A
[ampere(s)]
Electric
charge,
C
[coulomb(s)]
Quantity of
electricity
{1 C＝1 A・s}
Tension,
V
[volt(s)]
{1 V＝1 W/A}
Other Units 1)
A・h
Conversion into SI units
✽
Conversion from SI units
1 A・h＝3.6 kC
Capacitance
F
[farad(s)]
{1 F＝1 C/V}
Magnetic field
strength
A/m
Oe [oersted(s)]
103
1 Oe＝ A/m
4π
1 A/m＝4 π ×10−3 Oe
Magnetic flux
density
T
[tesla(s)]
1 T＝1 N/(A・m)
＝1 Wb/m2
＝1 V・s/m2
Gs [gauss(es)]
γ [gamma(s)]
1 Gs＝10−4 T
1 γ ＝10−9 T
1 T＝104 Gs
1 T＝109 γ
Magnetic flux
Wb
[weber(s)]
{1 Wb＝1 V・s}
Mx [maxwell(s)]
1 Mx＝10−8 Wb
1 Wb＝108 Mx
Self inductance
H
[henry (– ries)]
{1 H＝1 Wb/A}
Resistance
(to direct current)
Ω
[ohm(s)]
{1Ω＝1 V/A}
Conductance
(to direct current)
S
[siemens]
{1 S＝1 A/V}
Active power
W
1 W＝1 J/s
＝1 A・V
℃−1 [per degree]
erg [erg(s)]
kgf・m
cal [calories]
cal 15 [15 degree calories]
cal IT [I. T. calories]
1 erg＝10−7 J
1 J＝107 erg
1 cal＝4.186 05 J
(when temperature is not specified)
1 cal 15＝4.185 5 J
1 cal IT＝4.186 J
1 Mcal IT＝1.163 kW・h
1 J＝0.238 89 cal
Thermal
conductivity
W/ (m・K)
W/ (m・℃)
cal/ (s・m・℃)
1 W/ (m・℃)＝1 W/ (m・K)
1 cal/ (s・m・℃)＝
4.186 05 W/ (m・K)
Coeffcient of
heat transfer
W/ (m2・K)
W/ (m2・℃)
cal/ (s・m2・℃)
1 W/ (m2・℃)＝1 W/ (m2・K)
1 cal/ (s・m2・℃)＝
4.186 05 W/ (m2・K)
Heat
capacity
J/K
J/℃
1 J/℃＝1 J/K
Massic heat
capacity
J/ (kg・K)
Note 1)
SI units
9
t＋32)°
F
5
{t℃＝(t+273.15)K}
Linear
expansion
coefficient
Mass
Electric
potential
K
[kelvin(s)]
SI units and conversion factors
SI units and conversion factors
Supplementary Tables
Supplementary table 5(3) SI units and conversion factors
J/ (kg・℃)
1 kW・h＝0.86×106 cal
✽ : Unit can be used as an SI unit.
No asterisk : Unit cannot be used.
122
4
BEARINGS
Supplementary table 6 Inch/millimeter conversion
4
inches
Supplementary Tables
inch
0
1
2
3
4
5
Supplementary table 7
6
7
8
9
10
mm
Cleanliness classes
JIS B9920/ISO14644-1 Upper limit to the concentration of individual cleanliness classes (particle count/m3)
0
1/64
1/32
3/64
0
0.015625
0.03125
0.046875
0
0.3969
0.7938
1.1906
25.4000
25.7969
26.1938
26.5906
50.8000
51.1969
51.5938
51.9906
76.2000
76.5969
76.9938
77.3906
101.6000
101.9969
102.3938
102.7906
127.0000
127.3969
127.7938
128.1906
152.4000
152.7969
153.1938
153.5906
177.8000
178.1969
178.5938
178.9906
203.2000
203.5969
203.9938
204.3906
228.6000
228.9969
229.3938
229.7906
254.0000
254.3969
254.7938
255.1906
1/16
5/64
3/32
7/64
0.0625
0.078125
0.09375
0.109375
1.5875
1.9844
2.3812
2.7781
26.9875
27.3844
27.7812
28.1781
52.3875
52.7844
53.1812
53.5781
77.7875
78.1844
78.5812
78.9781
103.1875
103.5844
103.9812
104.3781
128.5875
128.9844
129.3812
129.7781
153.9875
154.3844
154.7812
155.1781
179.3875
179.7844
180.1812
180.5781
204.7875
205.1844
205.5812
205.9781
230.1875
230.5844
230.9812
231.3781
255.5875
255.9844
256.3812
256.7781
1/8
9/64
5/32
11/64
0.125
0.140625
0.15625
0.171875
3.1750
3.5719
3.9688
4.3656
28.5750
28.9719
29.3688
29.7656
53.9750
54.3719
54.7688
55.1656
79.3750
79.7719
80.1688
80.5656
104.7750
105.1719
105.5688
105.9656
130.1750
130.5719
130.9688
131.3656
155.5750
155.9719
156.3688
156.7656
180.9750
181.3719
181.7688
182.1656
206.3750
206.7719
207.1688
207.5656
231.7750
232.1719
232.5688
232.9656
257.1750
257.5719
257.9688
258.3656
3/16
13/64
7/32
15/64
0.1875
0.203125
0.21875
0.234375
4.7625
5.1594
5.5562
5.9531
30.1625
30.5594
30.9562
31.3531
55.5625
55.9594
56.3562
56.7531
80.9625
81.3594
81.7562
82.1531
106.3625
106.7594
107.1562
107.5531
131.7625
132.1594
132.5562
132.9531
157.1625
157.5594
157.9562
158.3531
182.5625
182.9594
183.3562
183.7531
207.9625
208.3594
208.7562
209.1531
233.3625
233.7594
234.1562
234.5531
258.7625
259.1594
259.5562
259.9531
1/4
17/64
9/32
19/64
0.25
0.265625
0.28125
0.296875
6.3500
6.7469
7.1438
7.5406
31.7500
32.1469
32.5438
32.9406
57.1500
57.5469
57.9438
58.3406
82.5500
82.9469
83.3438
83.7406
107.9500
108.3469
108.7438
109.1406
133.3500
133.7469
134.1438
134.5406
158.7500
159.1469
159.5438
159.9406
184.1500
184.5469
184.9438
185.3406
209.5500
209.9469
210.3438
210.7406
234.9500
235.3469
235.7438
236.1406
260.3500
260.7469
261.1438
261.5406
5/16
21/64
11/32
23/64
0.3125
0.328125
0.34375
0.359375
7.9375
8.3344
8.7312
9.1281
33.3375
33.7344
34.1312
34.5281
58.7375
59.1344
59.5312
59.9281
84.1375
84.5344
84.9312
85.3281
109.5375
109.9344
110.3312
110.7281
134.9375
135.3344
135.7312
136.1281
160.3375
160.7344
161.1312
161.5281
185.7375
186.1344
186.5312
186.9281
211.1375
211.5344
211.9312
212.3281
236.5375
236.9344
237.3312
237.7281
261.9375
262.3344
262.7312
263.1281
3/8
25/64
13/32
27/64
0.375
0.390625
0.40625
0.421875
9.5250
9.9219
10.3188
10.7156
34.9250
35.3219
35.7188
36.1156
60.3250
60.7219
61.1188
61.5156
85.7250
86.1219
86.5188
86.9156
111.1250
111.5219
111.9188
112.3156
136.5250
136.9219
137.3188
137.7156
161.9250
162.3219
162.7188
163.1156
187.3250
187.7219
188.1188
188.5156
212.7250
213.1219
213.5188
213.9156
238.1250
238.5219
238.9188
239.3156
263.5250
263.9219
264.3188
264.7156
Particle diameter range 0.1 to 0.2
7/16
29/64
15/32
31/64
0.4375
0.453125
0.46875
0.484375
11.1125
11.5094
11.9062
12.3031
36.5125
36.9094
37.3062
37.7031
61.9125
62.3094
62.7062
63.1031
87.3125
87.7094
88.1062
88.5031
112.7125
113.1094
113.5062
113.9031
138.1125
138.5094
138.9062
139.3031
163.5125
163.9094
164.3062
164.7031
188.9125
189.3094
189.7062
190.1031
214.3125
214.7094
215.1062
215.5031
239.7125
240.1094
240.5062
240.9031
265.1125
265.5094
265.9062
266.3031
Remarks 1) The U.S. Federal Standards are no longer in effect; however, in Japan and in the U.S., the old Federal Standard (FEDSTD-209D) is commonly referred to.
2) The FED-STD-209D specifies that Class 100 limits the count of particles 0.5 µm or greater in diameter) to 100 (3 520 per
cubic meter). This corresponds to Class 5 in the Japanese Industrial Standard and ISO Standard. (1 m3 = 35.3 ft3)
1/2
33/64
17/32
35/64
0.5
0.515625
0.53125
0.546875
12.7000
13.0969
13.4938
13.8906
38.1000
38.4969
38.8938
39.2906
63.5000
63.8969
64.2938
64.6906
88.9000
89.2969
89.6938
90.0906
114.3000
114.6969
115.0938
115.4906
139.7000
140.0969
140.4938
140.8906
165.1000
165.4969
165.8938
166.2906
190.5000
190.8969
191.2938
191.6906
215.9000
216.2969
216.6938
217.0906
241.3000
241.6969
242.0938
242.4906
266.7000
267.0969
267.4938
267.8906
9/16
37/64
19/32
39/64
0.5625
0.578125
0.59375
0.609375
14.2875
14.6844
15.0812
15.4781
39.6875
40.0844
40.4812
40.8781
65.0875
65.4844
65.8812
66.2781
90.4875
90.8844
91.2812
91.6781
115.8875
116.2844
116.6812
117.0781
141.2875
141.6844
142.0812
142.4781
166.6875
167.0844
167.4812
167.8781
192.0875
192.4844
192.8812
193.2781
217.4875
217.8844
218.2812
218.6781
242.8875
243.2844
243.6812
244.0781
268.2875
268.6844
269.0812
269.4781
5/8
41/64
21/32
43/64
0.625
0.640625
0.65625
0.671875
15.8750
16.2719
16.6688
17.0656
41.2750
41.6719
42.0688
42.4656
66.6750
67.0719
67.4688
67.8656
92.0750
92.4719
92.8688
93.2656
117.4750
117.8719
118.2688
118.6656
142.8750
143.2719
143.6688
144.0656
168.2750
168.6719
169.0688
169.4656
193.6750
194.0719
194.4688
194.8656
219.0750
219.4719
219.8688
220.2656
244.4750
244.8719
245.2688
245.6656
269.8750
270.2719
270.6688
271.0656
11/16
45/64
23/32
47/64
0.6875
0.703125
0.71875
0.734375
17.4625
17.8594
18.2562
18.6531
42.8625
43.2594
43.6562
44.0531
68.2625
68.6594
69.0562
69.4531
93.6625
94.0594
94.4562
94.8531
119.0625
119.4594
119.8562
120.2531
144.4625
144.8594
145.2562
145.6531
169.8625
170.2594
170.6562
171.0531
195.2625
195.6594
196.0562
196.4531
220.6625
221.0594
221.4562
221.8531
246.0625
246.4594
246.8562
247.2531
271.4625
271.8594
272.2562
272.6531
3/4
49/64
25/32
51/64
0.75
0.765625
0.78125
0.796875
19.0500
19.4469
19.8438
20.2406
44.4500
44.8469
45.2438
45.6406
69.8500
70.2469
70.6438
71.0406
95.2500
95.6469
96.0438
96.4406
120.6500
121.0469
121.4438
121.8406
146.0500
146.4469
146.8438
147.2406
171.4500
171.8469
172.2438
172.6406
196.8500
197.2469
197.6438
198.0406
222.2500
222.6469
223.0438
223.4406
247.6500
248.0469
248.4438
248.8406
273.0500
273.4469
273.8438
274.2406
13/16
53/64
27/32
55/64
0.8125
0.828125
0.84375
0.859375
20.6375
21.0344
21.4312
21.8281
46.0375
46.4344
46.8312
47.2281
71.4375
71.8344
72.2312
72.6281
96.8375
97.2344
97.6312
98.0281
122.2375
122.6344
123.0312
123.4281
147.6375
148.0344
148.4312
148.8281
173.0375
173.4344
173.8312
174.2281
198.4375
198.8344
199.2312
199.6281
223.8375
224.2344
224.6312
225.0281
249.2375
249.6344
250.0312
250.4281
274.6375
275.0344
275.4312
275.8281
7/8
57/64
29/32
59/64
0.875
0.890625
0.90625
0.921875
22.2250
22.6219
23.0188
23.4156
47.6250
48.0219
48.4188
48.8156
73.0250
73.4219
73.8188
74.2156
98.4250
98.8219
99.2188
99.6156
123.8250
124.2219
124.6188
125.0156
149.2250
149.6219
150.0188
150.4156
174.6250
175.0219
175.4188
175.8156
200.0250
200.4219
200.8188
201.2156
225.4250
225.8219
226.2188
226.6156
250.8250
251.2219
251.6188
252.0156
276.2250
276.6219
277.0188
277.4156
15/16
61/64
31/32
63/64
0.9375
0.953125
0.96875
0.984375
23.8125
24.2094
24.6062
25.0031
49.2125
49.6094
50.0062
50.4031
74.6125
75.0094
75.4062
75.8031
100.0125
100.4094
100.8062
101.2031
125.4125
125.8094
126.2062
126.6031
150.8125
151.2094
151.6062
152.0031
176.2125
176.6094
177.0062
177.4031
201.6125
202.0094
202.4062
202.8031
227.0125
227.4094
227.8062
228.2031
252.4125
252.8094
253.2062
253.6031
277.8125
278.2094
278.6062
279.0031
123
(Comparison with the U.S. federal standards)
Cleanliness class
FED 209D
class
class
class
class
class
class
1
10
100
1 000
10 000
100 000
class 2
class 3
class 4
class 5
class 6
class 7
class 8
class 9
10
100
1 000
10 000
100 000
1 000 000
─
─
─
2
24
237
2 370
23 700
237 000
─
─
─
─
─
─
─
─
class 1
0.1
0.2
3
（particle count/ft ）
Particulate
diameter (µm)
JIS/ISO
─
0.3
─
10
102
1 020
10 200
102 000
0.5
─
4
35
352
3 520
35 200
352 000
3 520 000
35 200 000
1.0
─
─
8
83
832
8 320
83 200
832 000
8 320 000
5.0
─
─
29
293
2 930
29 300
293 000
0.1 to 0.5
─
─
0.1 to 1.0
0.1 to 5.0
0.5 to 5.0
124
Inch/millimeter conversion and Cleanliness classes
CERAMIC BEARINGS AND
Company name
Division, department, and section
Name of staff
member in charge
Phone
Company name
FAX
Extreme Special Environments
Specifications Sheet for Ceramic Bearings and/or
Date
FAX
Note: For the selection of the most suitable bearing this sheet must be completed in as much detail as possible.
Bearing size
and bearing
number
Date
Bearing size
and bearing
number
a. For new design
b. For repair
a. For new design
Application
b. For repair
Application
Rotation
speed,
min–1
b. Outer ring rotating
min. :
max. :
Normal :
·
)
Required
performance
a. Life b. High speed c. Low dust generation d. Vacuum e. Corrosion resistance f. High temperature
min. :
Linear
max. :
motion speed,
Normal :
mm/s
Start-up time :
· Other (
)
Stroke, mm
Material
Axial :
Fitting
N
i. Others (
h/day
Radial :
Load
h. Insulation
· 24 h/day
Running time
a. Inner ring rotating
g. Non-magnetism
Running time
a. Life b. High speed c. Low dust generation d. Vacuum e. Corrosion resistance f. High temperature
Operation a. Dual-directional b. Continuous c. Intermittent
Operating
condition
Phone
Extreme Special Environments
Specifications Sheet for Linear Motion Bearings
Bearings
Note: For the selection of the most suitable bearing this sheet must be completed in as much detail as possible.
Required
performance
Division, department, and section
Name of staff
member in charge
Moment :
Tolerance
Surface roughness
Shaft
g. Non-magnetism
h. Insulation
i. Others (
)
· 24 h/day
·
h/day
· Other (
)
Drive system
Bearing loaded :
Operating
condition
Load
N
Moment :
Other :
Housing
Temperature: Normal
Environment
Pressure:
Pa
, max.
a. Atmospheric
Humidity:
b. Atmospheric {| vacuum
Cleanness:
c. Vacuum
d. Other (
Temperature: Normal
)
Environment
Corrosive gas:
Bearing material:
a. Atmospheric
b. Atmospheric {| vacuum
Corrosive gas:
Bearing material:
Lubrication:
Lubricant:
Failure condition:
¡ By this sheet, the ceramic and/or EXSEV bearings most suitable to operating conditions can be created.
Present
condition
Lubricant:
Bearing life:
Failure condition:
Rough sketch of bearing mounting
section and/or other remarks
Bearing life:
Rough sketch of bearing mounting
section and/or other remarks
Present
condition
Pa
Humidity:
Corrosive liquid:
Corrosive liquid:
Lubrication:
Pressure:
, max.
¡ By this sheet, the linear motion bearings most suitable to operating conditions can be created.
Cleanness:
c. Vacuum
d. Other (
)
INTERNATIONAL NETWORK
KOYO SEIKO CO., LTD. HEAD OFFICE
No.5-8, Minamisemba 3-chome, Chuo-ku, Osaka 542-8502, JAPAN
TEL : 81-6-6245-6087
FAX : 81-6-6244-9007
OFFICES
KOYO CANADA INC.
5324 South Service Road, Burlington, Ontario L7L 5H5, CANADA
TEL : 1-905-681-1121
FAX : 1-905-681-1392
CORPORATION OF U.S.A.
* KOYO
-Cleveland Office29570 Clemens Road, P.O.Box 45028 Westlake,
OH 44145, U.S.A.
TEL : 1-440-835-1000
FAX : 1-440-835-9347
-Detroit Office47771 Halyard Drive, Plymouth, MI 48170, U.S.A.
TEL : 1-734-454-1500
FAX : 1-734-454-4076
STEERING SYSTEMS OF U.S.A. INC.
* KOYO
47771 Halyard Drive, Plymouth, MI 48170, U.S.A.
TEL : 1-734-454-7067
FAX : 1-734-454-7059
KOYO MÉXICANA, S.A. DE C.V.
Rio Nazas No.171, 3er piso, Col. Cuauhtemoc, México, D.F. C.P.
06500, MÉXICO
TEL : 52-55-5207-3860
FAX : 52-55-5207-3873
LATIN AMERICA, S.A.
** KOYO
Edificio Banco del Pacifico Planta Baja, Calle Aquilino de la
Guardia y Calle 52, Panama, REPUBLICA DE PANAMA
TEL : 507-208-5900
FAX : 507-264-2782/507-269-7578
KOYO ROLAMENTOS DO BRASIL LTDA.
Rua Desembargador Eliseu Ghilherme 304, 7-Andar,
Paraiso CEP 04004-30, BRASIL
TEL : 55-11-3887-9173
FAX : 55-11-3887-3039
THAI KOYO CO., LTD.
172 Moo 12 Tambol Bangwua, Amphur Bangpakong,
Chachoengsao 24180, THAILAND
TEL : 66-38-533-310-7
FAX : 66-38-532-776
KOYO SINGAPORE BEARING (PTE.) LTD.
38 Tuas West Road, Singapore 638385, SINGAPORE
TEL : 65-6274-2200
FAX : 65-6862-1623
-India Office1104,GD-ITL Tower,B-08, NETAJI SUBHASH PLACE,PITAM PURA,
DELHI 110034 INDIA
TEL : 91-11-2735-3502∼04
91-11-5537-4803∼04
FAX : 91-11-2715-3501
PHILIPPINE KOYO BEARING CORPORATION
Rm.504, Comfoods Bldg., Cor. Gil Puyat Ave. and
Pasong Tamo, Makati City, PHILIPPINES
TEL : 63-2-817-8881/8901
FAX : 63-2-867-3148
KOYO KOREA CO., LTD.
Inwoo Building 6F, 539-11, Shinsa-Dong,
Kangnam-Ku, Seoul, KOREA
TEL : 82-2-549-7922
FAX : 82-2-549-7923
KOYO SEIKO CO., LTD. BEIJING LIAISON OFFICE
Room 809, Jingtai Tower, 24 Jianguomenwai Street, Beijing,
100022, CHINA
TEL : 86-10-6515-0037
FAX : 86-10-6515-0522
BEARING PLANTS
KOYO (SHANGHAI) CO., LTD.
Rm.1905, Aetna Tower, 107 Zunyi Road, Shanghai 200051, CHINA
TEL : 86-21-6237-5280
FAX : 86-21-6237-5277
KOYO SEIKO CO., LTD. SHANGHAI LIAISON OFFICE
Rm.1907, Aetna Tower, 107 Zunyi Road, Shanghai 200051, CHINA
TEL : 86-21-6237-5280
FAX : 86-21-6237-5277
AUSTRALIA PTY. LTD.
** KOYO
Unit 7, 175-179 James Ruse Drive, Rosehill, N.S.W. 2142 ,
AUSTRALIA
TEL : 61-2-9638-2355
FAX : 61-2-9638-3368
KOYO SEIKO CO., LTD. EUROPEAN CENTRAL OFFICE
Markerkant 13-01, 1314 AN Almere, THE NETHERLANDS
TEL : 31-36-5383333
FAX : 31-36-5347212
KULLAGER SCANDINAVIA A.B.
* KOYO
Johanneslundsvagen 4 194 61 Upplands Väsby, SWEDEN
TEL : 46-8-594-212-10
FAX : 46-8-594-212-29
* KOYO STEERING EUROPE S.A.S.
Zone Industrielle du Broteau, B.P.1, 69540 Irigny, FRANCE
TEL : 33-4-7239-4444
FAX : 33-4-7851-2188
(U.K.) LTD.
* KOYO
Whitehall Avenue, Kingston, Milton Keynes MK10 OAX,
UNITED KINGDOM
TEL : 44-1908-289300
FAX : 44-1908-289333
B.V.
* EUROPA-KOYO
Lekdijk 187, 2967 GJ Langerak, THE NETHERLANDS
TEL : 31-184-606800
FAX : 31-184-602572/606857
KOYO ROMANIA REPRESENTATIVE OFFICE
Str. Frederic Jolliot-Curie, Nr.3, Etaj 1, Ap.2, Sector 5
Bucharest, ROMANIA
TEL : 40-21-410-4170/4182/0984
FAX : 40-21-410-1178
DEUTSCHLAND GMBH.
* KOYO
Bargkoppelweg 4, D-22145 Hamburg, GERMANY
TEL : 49-40-67-9090-0
FAX : 49-40-67-9203-0
* KOYO FRANCE S.A.
8 Rue Guy Moquet, B.P.189 Z.I., 95105 Argenteuil Cedex, FRANCE
TEL : 33-1-3998-4202
FAX : 33-1-3998-4244/4249
* KOYO IBERICA, S.A.
Avda.da la Industria, 52-2 izda 28820
Coslada Madrid, SPAIN
TEL : 34-91-329-0818
FAX : 34-91-747-1194
ITALIA S.R.L.
* KOYO
Via Bronzino 9, 20133 Milano, ITALY
TEL : 39-02-2951-0844
FAX : 39-02-2951-0954
CORPORATION OF U.S.A.
* KOYO
(MANUFACTURING DIVISION)
AUTOPARTS SDN. BHD.
** T&K
P.O.BOX 7300, 40710 Shah Alam, Lot 24 Jalan Delima (1/3),
-Orangeburg Plant2850 Magnolia Street, Orangeburg, SC 29115, U.S.A.
TEL : 1-803-536-6200
FAX : 1-803-534-0599
-Richland Plant1006 Northpoint Blvd.Blythewood, SC 29016, U.S.A.
TEL : 1-803-691-4624/4633
FAX : 1-803-691-4655
MANUFACTURING (THAILAND) CO., LTD.
*** KOYO
172 Moo 12 Tambol Bangwua, Amphur Bangpakong,
Chachoengsao 24180, THAILAND
TEL : 66-38-531-988/993
FAX : 66-38-531-996
MANUFACTURING (PHILIPPINES) CORPORATION
** KOYO
Lima Technology Center, Municipality of Malvar, Batangas
Province, 4233 PHILIPPINES
TEL : 63-43-981-0088
FAX : 63-43-981-0001
28-12, Yulpo-Ri, Koduc-Myun, Pyung Teak-City, Kyungki-Do, KOREA
TEL : 82-31-668-6381
FAX : 82-31-668-6384
BEARING DALIAN CO., LTD.
** KOYO
No.II A-2 Dalian Export Processing Zone, CHINA
TEL : 86-411-8731-0972/0974
FAX : 86-411-8731-0973
TEL : 86-510-5161901
FAX : 86-510-5161143
-Plant38/6, Delhi-Jaipur Road P.B.No.18, Gurgaon-122 001,
Haryana, INDIA
TEL : 91-124-2215101∼07
FAX : 91-124-2215111
STEERING (THAILAND) CO., LTD.
*** KOYO
172/1 Moo 12 Tambol Bangwua, Amphur Bangpakong,
KOYO STEERING SYSTEM CO., LTD.
*** YUBEI
No.322 Heping Road, Xinxiang City, Henan Province 453003, CHINA
TEL : 86-373-508-8540
FAX : 86-373-508-8241
KOYO STEERING SYSTEMS CO., LTD.
* FAW
No.5568 Dongfeng Street, Changchun City, CHINA
STEERING LION S.A.S.
* KOYO
Zone Industrielle du Broteau B.P. 1, 69540 Irigny, FRANCE
TEL : 33-472-39-4444
FAX : 33-478-51-2188
KOYO WAZHOU AUTOMOBILE BEARING CO., LTD.
*** DALIAN
96, Liaohe East Road, Dalian D.D Port, CHINA
TEL : 86-411-740-7272
FAX : 86-411-740-7373
BEARINGS (EUROPE) LTD.
* KOYO
P.O.Box 101, Elmhirst Lane, Dodworth, Barnsley,
South Yorkshire, S75 3TA, UNITED KINGDOM
TEL : 44-1226-733200
FAX : 44-1226-204029
S.A.S
* KOYO-HPI
Z.I. 26, Rue Condorcet B.P.87, 94432 ChennevieresSur-Marne Cedex, FRANCE
TEL : 33-1-4962-2800
FAX : 33-1-4576-6840
STEERING DIJON SAINT ETIENNE S.A.S.
* KOYO
38, bd Voltaire-B.P. 21630/21016 Dijon Cedex, FRANCE
TEL : 33-3-8063-5858
FAX : 33-3-8063-5110
ROMANIA S.A.
*** KOYO
1, Tr. Magurele Street, 140003 Alexandria, ROMANIA
TEL : 40-24-731-2605
FAX : 40-24-731-5892
STEERING SYSTEM PLANTS
STEERING SYSTEMS OF U.S.A. INC. VIRGINIA PLANT
* KOYO
555 International Parkway Daleville, Virginia 24083, U.S.A.
TEL : 1-540-966-3505
FAX : 1-540-966-3506
KOYO STEERING SYSTEMS COMPANY
*** TENNESSEE
55 Excellence Way, Vonore, Tennessee 37885, U.S.A.
TEL : 1-423-884-9200
FAX : 1-423-884-9295
STEERING BRASIL LTDA.
* KOYO
Rod.Joao Leopoldo Jacomel 4015 Bairro Laranjeiras
TEL : 54-11-4302-7293
FAX : 54-11-4302-7489
8th Floor, DLF Square, DLF City, Part-II Gurgaon, INDIA
TEL : 91-124-256-0717∼9
FAX : 91-124-256-3004
TEL : 86-431-597-6274
FAX : 86-431-597-7404
KOYO BEARING CO., LTD.
** WUXI
3-6 Li Yuan Economic Development District, Wuxi, Jiangsu, CHINA
STEERING ARGENTINA S.A.
** KOYO
Perdriel 1859 1279-Buenos Aires, ARGENTINA
KOYO STEERING SYSTEMS LTD.
* SONA
-Head Office-
Chachoengsao 24180, THAILAND
TEL : 66-38-830-571/578
FAX : 66-38-830-579
KOYO JICO KOREA CO., LTD
Piraquara, Parana, CEP 83302-000, BRASIL
TEL : 55-41-3673-8100
FAX : 55-41-3673-2659
Subang Hi-Tech Industrial Park, Batu Tiga 40000 Shah Alam,
Selangor Darul Ehsan, MALAYSIA
TEL : 60-3-56351178
FAX : 60-3-56352379
KOYO STEERING SYSTEMS CZECH S.R.O.
Folmavska 37/1152, 301 00 Plzen-Skvrnany, Czech Republic
TEL : 420-378-011-011
FAX : 420-378-011-099
TECHNICAL CENTERS
NORTH AMERICAN TECHNICAL CENTER
47771 Halyard Drive, Plymouth, MI 48170, U.S.A.
TEL : 1-734-454-1500
FAX : 1-734-454-4076
EUROPEAN TECHNICAL CENTRE
Markerkant 13-02, 1314 AN Almere, THE NETHERLANDS
TEL : 31-36-5383350
FAX : 31-36-5302656
KOYO STEERING SYSTEMS OF U.S.A. INC.
STEERING TECHNICAL CENTER
47771 Halyard Drive, Plymouth, MI 48170, U.S.A.
TEL : 1-734-454-7067
FAX : 1-734-454-7059
KOYO STEERING EUROPE S.A.S.
EUROPEAN TECHNICAL CENTER
Zone Industrielle du Broteau, B.P.1, 69540 Irigny, FRANCE
TEL : 33-4-7239-4444
FAX : 33-4-7851-2188
SEIKO CO., LTD. (Japan) is certified to ISO/TS16949, ISO9001 and QS-9000.
）
（*KOYO
:ISO/TS16949 certified. **:ISO9001 certified. ***:QS-9000 certified.
CERAMIC BEARINGS
AND BEARINGS
CERAMIC BEARINGS AND
BEARINGS
EXTREME SPECIAL ENVIRONMENTS
TM
This catalog has been printed on paper of 100% waste
paper pulp using environmentally friendly soy ink.
CERAMIC BEARINGS AND EXSEV BEARINGS FOR EXTREME SPECIAL ENVIRONMENTS
FOR
CAT. NO. B2004E
Printed in Japan '06.03-1CDS ('05.06)
FOR
EXTREME SPECIAL ENVIRONMENTS
CAT. NO. B2004E
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