Catalogue des roulements rotule sur rouleaux tanches

Catalogue des roulements rotule sur rouleaux tanches
Sealed SKF Explorer
spherical roller bearings
Optimum protection against contaminants,
downtime and high maintenance costs
Contents
The SKF brand now stands for more
than ever before, and means more
to you as a valued customer.
While SKF maintains its leadership as a
high-quality bearing manufacturer
throughout the world, new dimensions
in technical advances, product support
and services have evolved SKF into a
truly solutions-oriented supplier,
creating greater value for customers.
These solutions enable customers to
improve productivity, not only with
breakthrough application-specific products, but also through leading-edge
design simulation tools and consultancy
services, plant asset efficiency maintenance programmes, and the industry’s
most advanced supply management
techniques.
The SKF brand still stands for the very
best in rolling bearings, but it now
stands for much more.
SKF – the knowledge engineering
company
A Product information
Robust, economical and environmentally friendly. . . . . . . . . . 3
Sealed SKF Explorer spherical roller bearings
provide distinct benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Enhanced efficiency in most industrial segments. . . . . . . . . . . 4
B Recommendations
Selection of bearing size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bearing life. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sealed versus open spherical roller bearings
– a comparison. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Bearing arrangement design. . . . . . . . . . . . . . . . . . . . . . . . . . . Abutment dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bearing space considerations. . . . . . . . . . . . . . . . . . . . . . . . . The SKF three-barrier solution. . . . . . . . . . . . . . . . . . . . . . . . 8
8
8
8
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Relubrication intervals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grease quantity for relubrication. . . . . . . . . . . . . . . . . . . . . . . The rule of thumb for maintenance-free. . . . . . . . . . . . . . . . . 9
9
9
9
Mounting and dismounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Dismounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
C Product data
Bearing data – general. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Supplementary data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Designations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Product table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
D Additional information
SKF – the knowledge engineering company . . . . . . . . . . . . . . . 26
2
Robust, economical and
environmentally friendly
Sealed SKF Explorer spherical
roller bearings provide
distinct benefits
SKF Explorer spherical roller bearings are
well-proven prod­ucts on the market, having
an attractive combination of design features
such as self-alignment and very high load
carrying capacity – features that make them
irreplace­able in many demanding
applications.
Sealed SKF Explorer spherical roller bearings have the same internal design as their
open counterparts and have additional
important features, distinct for both machine
designers and end users.
A
Compact bearing arrangements
Sealed spherical roller bearings are especially suitable for bearing arrangements
where, because of limited space or for cost
reasons, effective external seals are not
practical. The favourable design characteristics enable axial downsizing and therefore a
more efficient and compact machine design.
Environmentally friendly
By reducing grease consumption, users of
sealed spherical roller bearings can reduce
the cost of buying and disposing of grease.
But more importantly, these bearings can
reduce the environmental impact that a
machine will have while in service.
Reduced need for maintenance
Sealed SKF Explorer spherical roller bearings
are ready-to-use units that are filled, under
clean conditions, at the factory with a proper
amount of the correct grease. The bearings
can extend service life considerably due to
the cleanliness in the bearing cavity. As a
result, many applications can be considered
virtually maintenance-free.
Increased uptime and reliability
Cleanliness in a bearing is essential for long
service life. Even very small particles can
have a negative influence. By using sealed
spherical roller bearings instead of open
bearings, solid contaminants and moisture
can be efficiently stopped from entering the
bearing.
Grease savings
Contact seals on both sides of a bearing will
keep grease where it is needed the most
– inside the bearing.
In many cases, the grease service life is
actually longer than the service life of the
bearing or the application, making relubrication unnecessary.
3
Enhanced efficiency in most
industrial segments
Reliable
Sealed SKF Explorer spherical roller bearings provide a high degree of reliability in
the most demanding applications. The
integral seals retain the grease and protect
the bearing from the ingress of con­
taminants during handling, mounting,
and operation.
Lubricated
Bearings for normal operating temperatures
and speeds are lubricated with SKF LGEP 2,
a grease with a lithium thickener. The grease
has excellent rust inhibiting properties.
Protected
The bearings are fitted with a double-lip
seal on both sides. The seals are made of
either acrylonitrile-butadiene rubber (NBR)
or hydrogenated acrylonitrile-butadiene
rubber (HNBR) and reinforced with sheet
steel.
4
Industrial segments
• Metallurgy
• Mining and construction
• Fluid machinery
• Material handling
• Industrial gearboxes
• Textile industry
• Railways
• Energy
Typical customer requirements
• Long service life
• High load carrying capacity
• Compact arrangements
• Accommodate misalignment
• Minimum maintenance
• Low operating costs
• Few unplanned stops
• Environmental sustainability
• High availability
• Technical support
A
5
Selection of bearing size
Bearing life
The aSKF factor
The life-extending features embodied in
sealed SKF Explorer spherical roller bearings
can best be understood using the SKF
rating life equation in accordance with
ISO 281:1990/Amd 2:2000. The life can
be expressed in
The aSKF factor represents a very complex
relationship between various influencing
factors: the fatigue load limit ratio, contamination and lubrication. Values of the fatigue
load limit (Pu) are provided in the product
tables. Lubrication conditions are expressed
by the viscosity ratio k. Values of aSKF can
be obtained from diagram 1 for different
values of k and the expression hc (Pu/P).
Diagram 1 includes a safety factor commonly used in fatigue life considerations and
is valid for lubricants without EP additives. If
a lubricant containing such additives is used,
refer to the SKF General Catalogue or online
at www.SKF.com.
Lnm = a1 aSKF L10
using the equation:
qC w10/3
Lnm = a1 aSKF —
<P z
If the speed is constant, the life can best be
expressed in operating hours using the
equation:
1 000 000 qC w10/3
Lnmh = a1 aSKF ———––– —
<P z
60 n
where
Lnm = SKF rating life at (100 – n)%
reliability [millions of revolutions]1)
Lnmh = SKF rating life at (100 – n)%
reliability [operating hours]1)
L10 = basic rating life at 90% reliability
[millions of revolutions]
a1 = life adjustment factor for reliability
(† table 1)
aSKF = SKF life modification factor
(† diagram 1)
C = basic dynamic load rating [kN]
P = equivalent dynamic bearing
load [kN]
n = rotational speed [r/min]
1) The
factor n, to calculate Lnm and Lnmh represents the failure probability, i.e. the difference
between the requisite reliability and 100%
6
Equivalent dynamic bearing load
The equivalent dynamic bearing load for
spherical roller bearings can be obtained
from
P = Fr + Y1 Fa when Fa/Fr ≤ e
P = 0,67 Fr + Y2 Fa when Fa/Fr > e
where
P
=equivalent dynamic bearing
load [kN]
Fr =radial component of the bearing
load [kN]
Fa =axial component of the bearing
load [kN]
Y1, Y2=axial load factors for the bearings
e =calculation factor
Appropriate values for the factors e, Y1 and
Y2 can be found in the product tables for
each individual bearing.
Table 1
Values for life adjustment factor a1
Reliability Failure
SKF rating Factor
probability life
n1)
Lnm
a1
%
%
–
–
90
95
96
10
5
4
L10m
L5m
L4m
1
0,62
0,53
97
98
99
3
2
1
L3m
L2m
L1m
0,44
0,33
0,21
Sealed versus open spherical
roller bearings – a comparison
The performance enhancements incorporated into sealed SKF Explorer spherical
roller bearings can best be demonstrated
by comparing the calculated bearing life
of a sealed spherical roller bearing
BS2-2218-2CS/VT143 with a comparable
open bearing 22218 E.
Both bearings have the same basic dynamic
load rating C and fatigue load limit Pu.
Table 2
Guideline values for factor hc for different levels of contamination
Factor hc1)
for bearings with diameter
Condition
dm < 100 mm
dm ≥ 100 mm
Extreme cleanliness
Particle size of the order of the lubricant film
thickness. Laboratory conditions
1
1
High cleanliness
Oil filtered through an extremely fine filter.
Conditions typical of relubrication-free sealed bearings
0,8 … 0,6
0,9 … 0,8
C = 325 kN
Pu = 39 kN
Normal cleanliness
Oil filtered through a fine filter. Conditions typical
of bearings greased for life and sealed
0,6 … 0,5
0,8 … 0,6
The operating conditions are:
• Equivalent dynamic bearing load
P = 28,2 kN
• Viscosity ratio k = 2
• Contamination factor hc = 0,7 for the
sealed bearing († table 2).
• Contamination factor hc = 0,4 for the
open bearing († table 2).
Slight contamination
Slight contamination of the lubricant
0,5 … 0,3
0,6 … 0,4
Typical contamination
Typical conditions for bearings without integral seals,
where contamination levels are normal
0,3 … 0,1
0,4 … 0,2
Severe contamination
Bearing environment heavily contaminated and
bearing arrangement with inadequate sealing
0,1 … 0
0,1 … 0
Very severe contamination
Under extreme contamination, values of hc can be
outside the scale resulting in a more severe reduction
of life than predicted by the equation for Lnm
0
0
Life calculation for the sealed bearing:
Insert hc (Pu/P) = 0,7¥39/28,2 = 0,96 on
the horizontal scale in diagram 1. Move
vertically to the intersection with the
k = 2 curve. This gives aSKF ≈ 30,9.
L10m = aSKF(C/P)10/3 = 3,09¥(325/28,2)10/3
L10m = 106 800 million revolutions
1)The
scale for hc refers only to solid contaminants. Water or other fluid contaminants detrimental to
bearing service life are not included. In highly contaminated environments (hc = 0), the bearing will
fail prematurely due to excessive wear and will not attain the calculated bearing life.
Diagram 1
Life calculation for the open bearing:
20
10
5
4
3
4
1
2
1,5
0,8
6
1
0,7
0,
In this case, the rating life ratio between
equivalent sealed and open bearings results
in 106 800/24 500 = 4,4. In other words,
the life of the sealed bearing is more than
four times longer than that of the open
bearing.
50
aSKF
2
L10m = aSKF(C/P)10/3 = 7,1¥(325/28,2)10/3
L10m = 24 500 million revolutions
Factor aSKF for SKF Explorer radial roller bearings
k=
Insert hc (Pu/P) = 0,4¥39/28,2 = 0,55 on
the horizontal scale in diagram 1. Move
vertically to the intersection with the
k = 2 curve. This gives aSKF ≈ 7,1.
B
0,5
0,4
0,3
5
0,
0,4
0,3
0,2
0,15
0,1
0,2
0,1
0,05
0,005 0,01 0,02
0,05
0,1
0,2
0,5
1
3
Pu
hc ––
P
2
7
Bearing arrangement design
Abutment dimensions
Part of the range of sealed SKF spherical
roller bearings have an extended width
compared to corresponding open bearings.
These bearings cannot replace standard open
bearings without modifying the associated
components in the application.
Due to the tapered seal land, the face
diameter d2 is smaller in sealed bearings
than in corresponding open bearings
(† Product tables). When determining an
abutment diameter da, the lower d2 value
for the sealed bearings must be taken into
consideration († fig. 1).
Bearing space considerations
Sealed SKF spherical roller bearings are
designed in such a way that the seals are
positioned inside the side face plane. However, care must be taken so that nothing in
the housing or on the shaft can interfere
with the bearing seals during operation.
In applications where relubrication is
necess­ary, there must be sufficient axial
space († fig. 1) for the grease to purge
through the seals. The axial space should
be at least 10 times the maximum radial in­
ternal clearance value for the selected bearing († table 1, page 11).
The SKF three-barrier
solution
Fig. 1
The SKF three-barrier solution, which comprises a sealed spherical roller bearing, a
housing with a 70 to 90% grease fill, and external labyrinth seals († fig. 2), is a very
efficient sealing solution. Bearing arrangements with open bearings and contact seals
can actually generate more friction than the
SKF three-barrier solution. Using a sealed
spherical roller bearing also means that the
barrier grease used for filling the housing
and the labyrinth seals is independent of the
lubrication prerequisites of the bearing. Biodegradable greases can therefore be used.
For additional information about the SKF
three-barrier solution, contact the SKF
Appli­cation engineering service.
IMPORTANT: There must be axial free space
in the housing of a non-locating bearing or
the bearing will be unable to move.
Grease flow
Bb
d2
Bb ≥ 10 ¥ radial
internal clearance
Fig. 2
1 2
8
3
Lubrication
B
The sealed spherical roller bearings shown
in the product tables have, with two exceptions, an annular groove and three lubrication holes as standard.
When relubricating, grease should be
applied slowly and with low pressure to
the bearing as it rotates until fresh grease
emerges from the sealing lips. Excess
pressure should be avoided to prevent
seal damage.
For additional information, see the SKF
Interactive Engineering Catalogue online at
www.skf.com/bearings.
Relubrication intervals
The same relubrication intrvals should be
used for sealed as for open bearings.
Because of their internal design, sealed
SKF spherical roller bearings are able to
accommodate heavy axial loads. However,
if Fa/Fr > e († product tables), more
frequent relubrication is recommended.
Grease quantity for
relubrication
Suitable quantities for replenishment can be
obtained from
• used 8 hours per day but not always
fully utilized,
• normal operating conditions,
• horizontal shaft,
the bearing can be considered as virtually
maintenance-free when
Gp = 0,0015 D B
where
Gp = grease quantity to be added when replenishing, g
D = bearing outside diameter, mm
B = bearing width, mm
• the speed is less than 50% of the
limiting speed, and
• the operating temperature does not
exceed 70 °C (160 °F).
The green area in diagram 1 illustrates the
operating conditions where sealed spherical
roller bearings are virtually maintenancefree.
The rule of thumb for
maintenance-free
For general purpose applications categorized according to the General Catalogue
6000, page 72:
Diagram 1
The maintenance-free rule of thumb – valid for bearings with standard grease
(suffix VT143)
Temperature limit for
bearings with 2CS-type seals
Operating
temperature, [°C]
90
Approximate
grease life [h]
80
2
70
60
50
1
40
30
20
18 000
20 000
25 000
30 000
2
0
0,25
0,50
0,75
1,00
n
Speed ratio, —
n
lim
1 Application area where bearings are virtually maintenance-free.
2 Application area where, based on certain specific conditions, bearings can be considered virtually
maintenance-free.
9
Mounting and dismounting
Mounting
When mounting sealed spherical roller
bearings it is important not to subject the
bearings to excessive misalignment. If there
is a considerable moment load imposed on
the seals via the rollers or cages, there is a
risk that the seals may be dislodged or
damaged.
Bearings with a cylindrical bore
Sealed bearings with a cylindrical bore can
be heated with an induction heater and hot
mounted or pressed onto the shaft with a
mounting dolly.
SKF does not recommend heating sealed
bearings above 80 °C (175 °F). However, if
higher temperatures are necessary, make
sure that the temperature does not exceed
the permissible temperature of either the
seal or grease, whichever is lowest.
SKF does not recommend using a heating
plate. However, if using a heating plate is
unavoidable, the seal should not make contact with the plate. Appropriate distance
washers should be used.
SKF recommends using KMFE lock nuts
for the axial location of sealed spherical roller
bearings († pages 13 to 15). These nuts
provide the proper free space for the grease
to escape when relubricating the bearings
(† fig. 1, page 8 and fig. 1). The alternative
is to use a standard nut and lock washer. In
this case, however, a spacer must be fitted
between the lock washer and the inner ring.
The width of the spacer has to match the
axial free space condition, not to hinder the
escape of grease († fig. 1, page 8).
Bearings with a tapered bore
Fig. 1
Therefore, SKF recommends using the
SKF Drive-up method for reliable and easy
drive-up. General information is available
at www.skf.com/mount.
If the SKF Drive-up method is not an
option, the traditional drive-up method with
a hook spanner and angle measurement is
recommended. Additional information is
available in the online library at www.skf.com.
Mounting on an adapter sleeve
Adapter sleeves facilitate mounting and
dismounting and generally simplify the
arrangement design († fig. 2a).
For bearings that need to be axially pos­
itioned, it is preferable to use a withdrawal
sleeve († fig. 2b). However, if an adapter
sleeve is to be used, it is preferable to use a
support ring († fig. 2c).
Some bearings have a relatively small
radial space for the support ring and should
therefore not be subjected to a heavier axial
load than the adapter sleeve can accommodate. († www.skf.com/bearings).
Note that the bore chamfer radius r1,2min
for sealed spherical roller bearings with
a tapered bore differs from bearings with
a cylindrical bore. See page 12, table 2.
KMFE lock nut
Fig. 2
a
b
Dismounting
The general recommendations at
www.skf.com/bearings are valid also for
sealed spherical roller bearings.
If the sealed bearing is to be reused, care
should be taken to avoid damaging the seal.
c
When mounting sealed spherical roller
bearings with a tapered bore, the expansion
of the inner ring cannot be measured using
feeler gauges.
Support ring
10
Bearing data – general
Performance class
Dimensions
Internal clearance
All sealed SKF spherical roller bearings
belong to the SKF Explorer high performance
class.
The boundary dimensions of sealed SKF
spherical roller bearings are in accordance
with ISO 15:1998, except for the width of
sealed bearings in the BS2- series.
Standard sealed spherical roller bearings
from SKF are manufactured with Normal
radial internal clearance. Nearly all the
bearings are also available with a larger C3
internal clearance and some can be supplied
with an even larger C4 clearance. Some sizes
are available with C2 internal clearance,
which is smaller than Normal. Before ordering, contact SKF for availability of bearings
with radial internal clearance other than
Normal. The various radial internal clearances are in accordance with ISO 5753:1991
and listed in table 1. They are valid for zero
measuring load prior to mounting.
Cylindrical or tapered bore
Sealed SKF spherical roller bearings are
available with either a cylindrical or tapered
bore. The tapered bore is 1:12.
Annular groove and lubrication holes
To facilitate relubrication, all sealed SKF
spherical roller bearings, with the exception
of three sizes, have an annular groove and
three lubrication holes in the outer ring, as
standard.
Tolerances
Standard SKF spherical roller bearings are
manufactured to a higher precision than the
ISO Normal tolerances:
• The width tolerance is considerably tighter
than the ISO Normal tolerance.
• The running accuracy is to P5 tolerance
class.
Table 1
Radial internal clearance of sealed spherical roller bearings with
a cylindrical bore
Radial internal clearance of spherical roller bearings with
a tapered bore
Bore diameter
d
over incl.
Radial internal clearance
C2
Normal
min max
min max
Radial internal clearance
C2
Normal
min max
min max
mm
μm
C3
min
max
C4
min
max
C3
min
max
C4
min
max
μm
24
30
40
50
65
80
30
40
50
65
80
100
15
15
20
20
30
35
25
30
35
40
50
60
25
30
35
40
50
60
40
45
55
65
80
100
40
45
55
65
80
100
55
60
75
90
110
135
55
60
75
90
110
135
75
80
100
120
145
180
20
25
30
40
50
55
30
35
45
55
70
80
30
35
45
55
70
80
40
50
60
75
95
110
40
50
60
75
95
110
55
65
80
95
120
140
55
65
80
95
120
140
75
85
100
120
150
180
100
120
140
160
180
200
120
140
160
180
200
225
40
50
60
65
70
80
75
95
110
120
130
140
75
95
110
120
130
140
120
145
170
180
200
220
120
145
170
180
200
220
160
190
220
240
260
290
160
190
220
240
260
290
210
240
280
310
340
380
65
80
90
100
110
120
100
120
130
140
160
180
100
120
130
140
160
180
135
160
180
200
220
250
135
160
180
200
220
250
170
200
230
260
290
320
170
200
230
260
290
320
220
260
300
340
370
410
225
250
280
315
355
250
280
315
355
400
90
100
110
120
130
150
170
190
200
220
150
170
190
200
220
240
260
280
310
340
240
260
280
310
340
320
350
370
410
450
320
350
370
410
450
420
460
500
550
600
140
150
170
190
210
200
220
240
270
300
200
220
240
270
300
270
300
330
360
400
270
300
330
360
400
350
390
430
470
520
350
390
430
470
520
450
490
540
590
650
11
C
Fig. 1
Misalignment
The design of sealed SKF spherical roller
bearings is such that they are inherently
self-aligning, i.e. the bearings can accommodate angular misalignment of the shaft
relative to the housing without any negative
effect on bearing performance.
Under operating conditions where the
misalignment is constant relative to the outer
ring, sealed SKF spherical roller bearings
can accommodate angular misalignment of
the shaft relative to the housing of up to
0,5° with no detrimental effect on the
efficiency of the seals.
When misalignment is not constant with
respect to the bearing outer ring († fig. 1),
the bearing friction increases and therefore
the misalignment of the inner ring relative
to the outer ring should not exceed a few
tenths of a degree.
Influence of operating temperature
on the bearing materials
The temperature that a sealed spherical
roller bearing can accommodate is limited
by the grease and seal material.
• Bearings with suffix 2CS/VT143 should
not be used at operating temperatures
above +90 °C (194 °F).
• Bearings with suffix 2CS2/VT143 or
2CS5/VT143 should not be used at operating temperatures above +110 °C
(230 °F).
Axial load carrying capacity
Because of their internal design, sealed SKF
spherical roller bearings are able to accommodate heavy axial loads. However, if
Fa/Fr > e († product tables), more frequent
lubrication is recommended.
Speed ratings
The speed rating of sealed spherical roller
bearings is limited by the friction gener­ated
in the seal contacts. Accordingly, only the
limiting speed is listed in the product tables.
The limiting speed for sealed spherical roller
bearings is roughly 25% of the reference
speed of open bearings.
Seal materials
Depending on the size, sealed SKF spherical
roller bearings are fitted with seals made of
one of the following materials:
12
Table 2
Bore chamfer radii for bearings with
a cylindrical bore or a tapered bore
Cylindrical bore
r1,2min
Tapered bore
r1,2min
1,0 to 1,1
1,5 to 2,0
2,1 to 3,0
†
†
†
0,6
1,0
1,1
4,0
5,0
6,0
†
†
†
1,5
2,0
3,0
• acrylonitrile-butadiene rubber (NBR),
designation suffix CS
• hydrogenated acrylonitrile-butadiene
rubber (HNBR), designation suffix CS5,
• fluoro-elastomer (FKM), designation suffix
CS2. This material is being replaced by
HNBR.
Supplementary data
A practical overview of the sealed bearing
assortment including individual design differ­
ences, relubrication data and appropriate
accessories, is shown in the supplementary
data table on page 13 to 15.
The bore chamfer radius r1,2min listed in
the product table is valid for bearings with
a cylindrical bore. The corresponding values
for bearings with a tapered bore are listed in
table 2.
Designations
There are two designation modes for sealed
SKF Explorer spherical roller bearings. See
overview on page 16 to 17.
Warning !
Safety precautions for fluoro rubber
Fluoro rubber is very stable and harmless under normal operating conditions
up to +200 °C. However, if exposed to
extreme temperatures above 300 °C,
e.g. fire or the flame of a cutting torch,
fluoro rubber seals give off hazardous
fumes. These fumes can be harmful if
inhaled, as well as to the eyes. In add­
ition, once the seals have been heated to
such temperatures, they are dangerous
to handle even after they have cooled
and should not be in contact with the
skin. If it is necessary to handle bearings
with seals that have been subjected to
high temperatures, such as when dismounting the bearing, the following
safety precautions should be observed:
• Always wear protective goggles,
gloves and an appropriate breathing
apparatus.
• Place the remains of the seals in an
airtight plastic container marked with
a symbol for “material will etch”.
• Follow the safety precautions in the
appropriate material safety data sheet
(MSDS).
If there is unintentional contact with the
seals, wash hands with soap and plenty
of water and flush eyes with plenty of
water and consult a doctor immediately.
If the fumes have been inhaled, consult
a doctor immediately.
The user is responsible for the correct
use of the product during its service life
and its proper disposal. SKF takes no
responsibility for the improper handling
of fluoro rubber seals or for any injury
resulting from their use.
Supplementary data
C
Seal type
1
2
3
Bearing designation
Seal type
Standard seal
material
Standard
relubrication
features
Free space
in bearing
Appropriate
adapter sleeve incl.
lock nut
Appropriate
locating rings,
FRB1)
–
–
–
–
cm3
–
–
BS2-2205-2CS/VT143
BS2-2206-2CS/VT143
BS2-2207-2CS/VT143
1
1
1
NBR
NBR
NBR
W33
W33
W33
5,5
8
13
–
–
–
–
–
–
BS2-2208-2CS(K)/VT143
BS2-2308-2CS/VT143
BS2-2209-2CS(K)/VT143
1
2
2
NBR
NBR
NBR
W33
W33
W33
18
34
20
H 2308 E
–
H 309 E
5.5/80
–
1/85
BS2-2309-2CS/VT143
BS2-2210-2CS(K)/VT143
BS2-2310-2CS/VT143
2
2
2
NBR
NBR
NBR
W33
W33
W33
47
21
60
–
H 310 E
–
–
6.5/90
–
BS2-2211-2CS(K)/VT143
BS2-2311-2CS/VT143
BS2-2212-2CS(K)/VT143
2
2
2
NBR
NBR
NBR
W33
W33
W33
29
78
41
H 311 E
–
H 312 E
6.5/100
–
7/110
BS2-2312-2CS/VT143
24013-2CS5W/VT143
BS2-2213-2CS(K)/VT143
2
2
2
NBR
HNBR
NBR
W33
–
W33
99
26
48
–
–
H 2313 E
–
–
6.5/120
BS2-2313-2CS/VT143
BS2-2214-2CS(K)/VT143
BS2-2314-2CS/VT143
2
2
2
NBR
NBR
NBR
W33
W33
W33
120
57
148
–
H 314 E
–
–
–
–
24015-2CS2W/VT143
BS2-2215-2CS(K)/VT143
BS2-2315-2CS/VT143
2
2
2
FKM
NBR
NBR
–
W33
W33
33
62
180
–
H 315 E
–
–
9/130
–
BS2-2216-2CS(K)/VT143
BS2-2316-2CS/VT143
BS2-2217-2CS(K)/VT143
2
2
2
NBR
NBR
NBR
W33
W33
W33
74
210
95
H 316 E
–
H 317 E
9/140
–
8.5/150
BS2-2218-2CS(K)/VT143
23218-2CS/VT143
BS2-2219-2CS(K)/VT143
2
2
2
NBR
NBR
NBR
W33
W33
W33
120
100
145
H 2318 E/L73
H 2318 EL
H 2319 EL
8.5/160
6.25/160
8.5/170
24020-2CS2/VT143
23120-2CS2/VT143
24120-2CS5/VT143
2
2
3
FKM
FKM
HNBR
W33
W33
W33
60
87
180
–
–
–
–
–
–
BS2-2220-2CS5(K)/VT143 3
23220-2CS/VT143
3
23022-2CS/VT143
3
HNBR
NBR
NBR
W33
W33
W33
185
145
96
H 2320 E
–
–
7.5/180
4.85/180
–
1)
FRB = Locating ring in SNL housings
13
Seal type
2
3
Bearing designation
Seal type
Standard seal
material
Standard
relubrication
features
Free space
in bearing
Appropriate
adapter sleeve incl.
lock nut
Appropriate
locating rings,
FRB1)
–
–
–
–
cm3
–
–
24022-2CS5/VT143
23122-2CS5(K)/VT143
24122-2CS5/VT143
2
3
3
HNBR
HNBR
HNBR
W33
W33
W33
100
165
225
–
H 3122 E
–
–
–
–
BS2-2222-2CS5(K)/VT143 3
23222-2CS5(K)/VT143
3
23024-2CS2/VT143
3
HNBR
HNBR
FKM
W33
W33
W33
250
250
90
H 2322 E
H 2322 E
–
8.5/200
5.1/200
–
24024-2CS5/VT143
3
24124-2CS5/VT143
3
BS2-2224-2CS5(K)/VT143 3
HNBR
HNBR
HNBR
W33
W33
W33
135
305
290
–
–
H 2324 EH
–
–
8.5/215
23224-2CS5(K)/VT143
22324-2CS5(K)/VT143
23026-2CS5/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
310
630
170
H 2324 L
H 2324
H 3026 E
5/215
–
–
24026-2CS5/VT143
3
24126-2CS5/VT143
3
BS2-2226-2CS5(K)/VT143 3
HNBR
HNBR
HNBR
W33
W33
W33
200
325
390
–
–
H 2326 L
–
–
7.5/230
23226-2CS5(K)/VT143
22326-2CS5/K)/VT143
23028-2CS5(K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
375
760
180
H 2326 L
H 2326
H 3028 E
5/230
–
–
24028-2CS5/VT143
24128-2CS5/VT143
22228-2CS5(K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
210
395
400
–
–
H 3128 L
–
–
15/250
23228-2CS5(K)/VT143
22328-2CS5(K)/VT143
23030-2CS5(K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
530
950
215
H 2328
H 2328
H 3030 E
5/250
–
–
24030-2CS5/VT143
23130-2CS5(K)/VT143
24130-2CS2/VT143
3
3
3
HNBR
HNBR
FKM
W33
W33
W33
265
405
595
–
H 3130 E
–
–
–
–
22230-2CS5(K)/VT143
23230-2CS5/VT143
22330-2CS5(K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
495
780
1 100
H 3130
H 2330
H 2330
16.5/270
5/270
–
23032-2CS5 (K)/VT143
24032-2CS5/VT143
23132-2CS5(K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
265
320
590
H 3032 E
–
H 3132 E
–
–
–
24132-2CS5/VT143
22232-2CS5 (K)/VT143
22332-2CS5(K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
690
785
1 320
–
H 3132
H 2332
–
17/290
–
23034-2CS5 (K)/VT143
24034-2CS5/VT143
23134-2CS5 (K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
335
505
610
H 3034 E
–
H 3134 E
–
–
–
1)
14
FRB = Locating ring in SNL housings
Seal type
3
4
Bearing designation
Seal type
Standard seal
material
Standard
relubrication
features
Free space
in bearing
Appropriate
adapter sleeve incl.
lock nut
Appropriate
locating rings,
FRB
–
–
–
–
cm3
–
–
24134-2CS5/VT143
22234-2CS5 (K)/VT143
23036-2CS5 (K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
805
935
465
–
H 3134
H 3036 E
–
–
–
24036-2CS5/VT143
23136-2CS5 (K)/VT143
24136-2CS5/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
575
750
880
–
H 3136 L
–
–
–
–
22236-2CS5 (K)/VT143
23138-2CS5/VT143
24138-2CS5 (K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
830
840
1 250
H 3136
H 3138
–
–
–
–
22238-2CS5 (K)/VT143
23040-2CS5 (K)/VT143
23140-2CS5 (K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
1 050
650
1 050
H 3138
H 3040
H 3140
–
–
–
24140-2CS5/VT143
22240-2CS5 (K)/VT143
23240-2CS5 (K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
1 550
1 200
1 800
–
H 3140
H 2340 L
–
–
–
23044-2CS5 (K)/VT143
23144-2CS5 (K)/VT143
23944-2CS5/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
850
1 300
370
OH 3044 H
OH 3144 HTL
–
–
–
–
22244-2CS5 (K)/VT143
22344-2CS5 (K)/VT143
23048-2CS5 (K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
1 650
3 200
920
OH 3144 H
OH 2344 H
OH 3048 HE
–
23148-2CS5 (K)/VT143
23052-2CS5 (K)/VT143
23152-2CS5 (K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
1 650
1 350
2 700
OH 3148 HTL
OH 3052 HE
OH 3152 HTL
–
–
–
23156-2CS5 (K)/VT143
23160-2CS5 (K)/VT143
23164-2CS5(K)/VT143
3
3
3
HNBR
HNBR
HNBR
W33
W33
W33
2 500
3 200
3 900
OH 3156 HTL
OH 3160 HE
OH 3164 H
–
–
–
23168-2CS5(K)/VT143
23172-2CS5(K)/VT143
23180-2CS5(K)/VT143
3
3
4
HNBR
HNBR
HNBR
W33
W33
W33
5 300
6 100
6 800
OH 3168 HE
OH 3172 HE
OH 3180 HE
–
–
–
C
–
15
Designations
There are two designation modes for sealed
SKF Explorer spherical roller bearings. One
identifies sealed bearings in the standard
ISO dimension series. The other mode
identifies sealed bearings that are wider
than the ISO specification.
Bearings with principal dimensions according to ISO standard (Example: 24026-2CS5/VT143)
xxxxx-2CSx/xxxx
Basic
designation
Seals
2CS
2CS5
2CS2
Lubricant
VT143
Standard five-digit basic designation as for open bearings.
Acrylonitrile-butadiene rubber (NBR) seal on both sides.
Outer ring with relubrication features.
Hydrogenated acrylonitrile-butadiene rubber (HNBR) seal on both sides.
Outer ring with relubrication features.
Fluoroelastomer (FKM) seal on both sides. WARNING: See safety message on page 12.
Outer ring with relubrication features.
Filled to 25 to 45% with LGEP 2 grease.
See also Supplementary suffixes.
Bearings with extended width (Example: BS2-2222-2CS5/VT143)
BS2-xxxx-2CSx/xxxx
Basic
designation
Seals
2CS
2CS5
2CS2
Lubricant
VT143
16
Spherical roller bearing with two rows of rollers.
The two initial digits denote the dimension series and the two last digits
the bore diameter divided by 5.
Acrylonitrile-butadiene rubber (NBR) seal on both sides.
Outer ring with relubrication features.
Hydrogenated acrylonitrile-butadiene rubber (HNBR) seal on both sides.
Outer ring with W33 groove and holes.
Fluoroelastomer (FKM) seal on both sides. WARNING: See safety message on page 12.
Outer ring with W33 groove and holes.
Filled to 25 to 45% with LGEP 2 grease.
See also Supplementary suffixes.
Suffixes in product tables
Supplementary suffixes
2CSBearing sealed on both sides.
Seal material:
Acrylonitrile-butadiene rubber
(NBR).
Outer ring with W33 groove and
holes.
2CS2Bearing sealed on both sides.
Seal material: Fluoroelastomer
(FKM).
Outer ring with W33 groove and
holes.
2CS5Bearing sealed on both sides.
Seal material: Hydrogenated
acrylonitrile-butadiene rubber
(HNBR).
Outer ring with W33 groove and
holes.
K
Tapered bore. Taper 1:12
VT143Filled to 25 to 45% with LGEP 2
grease. The filling degree depends
on bearing size.
WBearing without W33 groove and
holes in the outer ring.
CSBearing sealed on one side
Seal material:
Acrylonitrile-butadiene rubber
(NBR)
Outer ring with W33 groove and
holes
CS5Bearing sealed on one side
Seal material: Hydrogenated
acrylonitrile-butadiene rubber
(HNBR).
Outer ring with W33 groove and
holes
C3Radial internal clearance greater
than Normal
C4Radial internal clearance greater
than C3
GEM9Filled to 70 to 100% with LGHB 2
grease
VT143BFilled to 45 to 60% with LGEP 2
grease
VT143CFilled to 70 to 100% with LGEP 2
grease
C
Former versus new suffixes
Former suffix
New suffix
xxxxx-2CS
(Grease specification
included in the 2CS suffix)
replaced by
xxxxx-2CS/VT143
(Grease specification not included in the
2CS suffix. Instead it is included in the
VT143 suffix)
xxxxx-2CS5
(Grease specification
included in the 2CS5 suffix)
replaced by
xxxxx-2CS5/GEM9
(Grease specification not included in the
2CS5 suffix. Instead it is included in the
GEM9 suffix)
17
Sealed SKF Explorer spherical roller bearings
d 25 – 95 mm
b
B
r1
K
r2
r1
r2
D D1
d
d d2
xxxxx-2CS
BS2-xxxx
Principal dimensions
Basic load ratings
dynamic
static
d
C
D
B
mm
C0
kN
Tapered bore
Fatigue
load
limit
Pu
Limiting
speed
Mass
Designations
Bearings with
cylindrical bore
kN
r/min
kg
–
Bearings with
tapered bore
25
52
23
49
44
4,75
3 600
0,26
BS2-2205-2CS/VT143
–
30
62
25
64
60
6,4
2 800
0,34
BS2-2206-2CS/VT143
–
35
72
28
86,5
85
9,3
2 400
0,52
BS2-2207-2CS/VT143
–
40
80
90
28
38
96,5
150
90
140
9,8
15
2 200
1 900
0,57
1,2
BS2-2208-2CS/VT143
BS2-2308-2CS/VT143
BS2-2208-2CSK/VT143
–
45
85
100
28
42
102
183
98
183
10,8
19,6
2 000
1 500
0,66
1,6
BS2-2209-2CS/VT143
BS2-2309-2CS/VT143
BS2-2209-2CSK/VT143
–
50
90
110
28
45
104
220
108
224
11,8
24
1 900
1 400
0,7
2,1
BS2-2210-2CS/VT143
BS2-2310-2CS/VT143
BS2-2210-2CSK/VT143
–
55
100
120
31
49
125
270
127
280
13,7
30
1 700
1 400
1
2,8
BS2-2211-2CS/VT143
BS2-2311-2CS/VT143
BS2-2211-2CSK/VT143
–
60
110
130
34
53
156
310
166
335
18,6
36,5
1 600
1 100
1,3
3,4
BS2-2212-2CS/VT143
BS2-2312-2CS/VT143
BS2-2212-2CSK/VT143
–
65
100
120
140
35
38
56
132
193
340
173
216
360
20,4
24
38
1 200
1 500
1 000
0,95
1,6
4,15
24013-2CS5W/VT143
BS2-2213-2CS/VT143
BS2-2313-2CS/VT143
–
BS2-2213-2CSK/VT143
–
70
125
150
38
60
208
400
228
430
25,5
45
1 400
900
1,8
5,1
BS2-2214-2CS/VT143
BS2-2314-2CS/VT143
BS2 2214-2CSK/VT143
–
75
115
130
160
40
38
64
173
212
440
232
240
475
28,5
26,5
48
1 000
1 300
950
1,55
2,1
6,5
24015-2CS2W/VT143
BS2-2215-2CS/VT143
BS2-2315-2CS/VT143
–
BS2-2215-2CSK/VT143
–
80
140
170
40
67
236
490
270
540
29
54
1 200
800
2,4
7,2
BS2-2216-2CS/VT143
BS2-2316-2CS/VT143
BS2-2216-2CSK/VT143
–
85
150
44
285
325
34,5
1 100
3
BS2-2217-2CS/VT143
BS2-2217-2CSK/VT143
90
160
160
48
52,4
325
355
375
440
39
48
1 000
750
3,7
4,65
BS2-2218-2CS/VT143
23218-2CS/VT143
BS2-2218-2CSK/VT143
–
95
170
51
380
450
46,5
950
4,65
BS2-2219-2CS/VT143
BS2-2219-2CSK/VT143
18
ra
ra
Ba
da db
Da da
C
Dimensions
d
d2
~
Abutment and fillet dimensions
D1
~
b
K
r1,21)
min
mm
da
min
da
max
db
min
Ba
min
Calculation factors
Da
max
ra
max
mm
e
Y1
Y2
Y0
–
25
30
47
3,7
2
1
30
30
–
–
46,4
1
0,35
1,9
2,9
1,8
30
36
55,7
3,7
2
1
35,6
36
–
–
56,4
1
0,31
2,2
3,3
2
35
43
63,7
3,7
2
1,1
42
43
–
–
65
1
0,31
2,2
3,3
2,2
40
47
47,5
73
81
5,5
5,5
3
3
1,1
1,5
47
47,5
47
47,5
44
–
8
–
73
81
1
1,5
0,28
0,37
2,4
1,8
3,6
2,7
2,5
1,8
45
53
55
77,1
89,1
5,5
5,5
3
3
1,1
1,5
52
54
53
55
48,5
50
0
6
78
81
1
1,5
0,26
0,37
2,6
1,8
3,9
2,7
2,5
1,8
50
58
61,5
82,1
97,6
5,5
5,5
3
3
1,1
2
57
61
58
61,5
53,5
56
2
6
83
99
1
2
0,24
0,37
2,8
1,8
4,2
2,7
2,8
1,8
55
64
67
91,9
109
6
5,5
3
3
1,5
2
64
66
64
67
59
61
2
6
91
109
1,5
2
0,24
0,35
2,8
1,9
4,2
2,9
2,8
1,8
60
69
75
102
117,1
6
8,3
3
4,5
1,5
2,1
69
72
69
75
64
66
1
6
101
118
1,5
2
0,24
0,35
2,8
1,9
4,2
2,9
2,8
1,8
65
71,9
76
78,8
92,8
111
125,6
5,5
5,5
8,3
3
3
4,5
1,1
1,5
2,1
71
74
77
71,5
76
78,8
–
70,5
72
–
14
5
94
111
128
1
1,5
2
0,27
0,24
0,35
2,5
2,8
1,9
3,7
4,2
2,9
2,5
2,8
1,8
70
80
86,8
115
136,1
6
8,3
3
4,5
1,5
2,1
79
82
80
86,8
75
76
1
6
116
138
1,5
2
0,23
0,33
2,9
2
4,4
3
2,8
2
75
81,5
84
88
105
119
144
5,5
6
8,3
–
3
4,5
–
1,5
2,1
81
84
87
81,5
84
88
–
80
82
–
3
5
109
121
148
1
1,5
2
0,28
0,22
0,35
2,4
3
1,9
3,6
4,6
2,9
2,5
2,8
1,8
80
91,5
94,2
128
152,1
6
8,3
3
4,5
2
2,1
91
92
91,5
94,2
85
88
2,5
6
129
158
2
2
0,22
0,35
3
1,9
4,6
2,9
2,8
1,8
85
98
138
6
3
2
96
98
90
1,5
139
2
0,22
3
4,6
2,8
90
102
104,5
148
147,1
6
5,5
3
3
2
2
101
101
102
104,5
96,5
–
20,5
–
149
149
2
2
0,24
0,31
2,8
2,2
4,2
3,3
2,8
2,2
95
109
157,1
8,3
4,5
2,1
107
109
105
23
158
2
0,24
2,8
4,2
2,8
1) Valid
for bearings with a cylindrical bore only. Corresponding values for bearings with a tapered bore are listed on page 12, table 2.
19
Sealed SKF Explorer spherical roller bearings
d 100 – 140 mm
b
B
r1
K
r2
r1
r2
D D1
d
d d2
BS2-xxxx
xxxxx-2CS
Principal dimensions
Basic load ratings
dynamic
static
d
C
D
B
mm
100
110
120
130
140
20
C0
kN
Tapered bore
Fatigue
load
limit
Pu
Limiting
speed
Mass
Designations
Bearings with
cylindrical bore
kN
r/min
kg
–
Bearings with
tapered bore
150
165
165
50
52
65
285
365
455
415
490
640
45,5
53
68
800
850
670
3,15
4,55
5,65
24020-2CS2/VT143
23120-2CS2/VT143
24120-2CS5/VT143
–
–
–
180
180
55
60,3
425
475
490
600
49
63
900
700
5,35
6,85
BS2-2220-2CS5/VT143
23220-2CS/VT143
BS2-2220-2CS5K/VT143
–
170
170
45
60
310
415
440
620
46,5
67
900
670
3,8
5
23022-2CS/VT143
24022-2CS/VT143
–
–
180
180
56
69
430
520
585
750
61
78
800
630
5,75
7,1
23122-2CS5/VT143
24122-2CS5/VT143
23122-2CS5K/VT143
–
200
200
63
69,8
560
600
640
765
63
76,5
800
640
7,6
9,85
BS2-2222-2CS5/VT143
23222-2CS5/VT143
BS2-2222-2CS5K/VT143
23222-2CS5K/VT143
180
180
200
46
60
80
355
430
655
510
670
950
52
68
95
850
670
560
3,65
5,45
10,3
23024-2CS2/VT143
24024-2CS5/VT143
24124-2CS5/VT143
–
–
–
215
215
260
69
76
86
630
695
980
765
930
1 120
73,5
93
100
750
600
600
9,75
12
23
BS2-2224-2CS5/VT143
23224-2CS5/VT143
22324-2CS5/VT143
BS2-2224-2CS5K/VT143
23224-2CS5K/VT143
22324-2CS5K/VT143
200
200
210
52
69
80
430
540
680
610
815
1 000
62
81,5
100
800
600
530
6
8,05
11
23026-2CS5/VT143
24026-2CS5/VT143
24126-2CS5/VT143
23026-2CS5K/VT143
–
–
230
230
280
75
80
93
735
780
1 120
930
1060
1 320
88
104
114
700
530
500
11
14,5
29
BS2-2226-2CS5/VT143
23226-2CS5/VT143
22326-2CS5/VT143
BS2-2226-2CS5K/VT143
23226-2CS5K/VT143
22326-2CS5K/VT143
210
210
225
53
69
85
465
570
765
680
900
1 160
68
88
112
700
560
450
6,55
8,55
13,5
23028-2CS5/VT143
24028-2CS5/VT143
24128-2CS5/VT143
23028-2CS5K/VT143
–
–
250
250
300
68
88
102
710
915
1 290
900
1 250
1 560
86,5
120
132
670
480
430
14
19
36,5
22228-2CS5/VT143
23228-2CS5/VT143
22328-2CS5/VT143
22228-2CS5K/VT143
23228-2CS5K/VT143
22328-2CS5K/VT143
ra
ra
Ba
da db
Da da
C
Dimensions
d
d2
~
Abutment and fillet dimensions
D1
~
b
K
r1,21)
min
mm
100
110
120
130
140
1) Valid
da
min
da
max
db
min
Ba
min
Calculation factors
Da
max
ra
max
mm
e
Y1
Y2
Y0
–
108
112
110
139
152
152
6
6
4,4
3
3
2
1,5
2
2
107
111
110
108
112
110
–
–
–
–
–
–
143
154
154
1,5
2
2
0,28
0,27
0,35
2,4
2,5
1,9
3,6
3,7
1,2
2,5
2,5
1,8
114
114
162
161
8,3
8,3
4,5
4,5
2,1
2,1
112
112
114
114
107,5
–
22,5
–
168
168
2
2
0,24
0,30
2,8
2,3
4,2
3,4
2,8
2,2
122
121
157
157
6
5,5
3
3
2
2
119
119
122
121
–
–
–
–
161
161
2
2
0,23
0,33
2,9
2
4,4
3
2,8
2
122
121
166
163
8,3
6
4,5
3
2
2
121
121
122
121
117
–
7
–
169
169
2
2
0,27
0,35
2,5
1,9
3,7
2,9
2,5
1,8
126
126
182
178
8,3
8,3
4,5
4,5
2,1
2,1
122
122
126
126
118
121
21,5
17
188
188
2
2
0,25
0,33
2,7
2
4
3
2,5
2
132
130
132
172
166
179
6
6
6
3
3
3
2
2
2
129
129
131
132
130
132
–
–
–
–
–
–
171
171
189
2
2
2
0,20
0,28
0,37
3,4
2,4
1,8
5
3,6
2,7
3,2
2,5
1,8
136
137
147
193
193
229
11,1
8,3
13,9
6
4,5
7,5
2,1
2,1
3
132
132
134
136
137
147
129
131
131
21,5
17
7
203
203
246
2
2
2,5
0,26
0,33
0,33
2,6
2
2
3,9
3
3
2,5
2
2
145
140
141
186
183
190
8,3
6
6
4,5
3
3
2
2
2
139
139
141
145
140
141
137
–
–
8
–
–
191
191
199
2
2
2
0,21
0,30
0,33
3,2
2,3
2
4,8
3,4
3
3,2
2,2
2
147
147
159
205
209
246
11,1
8,3
16,7
6
4,5
9
3
3
4
144
144
147
147
147
159
139
142
142
23,5
21
8
216
216
263
2,5
2,5
3
0,27
0,31
0,33
2,5
2,2
2
3,7
3,3
3
2,5
2,2
2
155
151
153
197
195
203
8,3
6
8,3
4,5
3
4,5
2
2
2,1
149
149
152
155
151
153
147
–
–
8
–
–
201
201
213
2
2
2
0,2
0,28
0,35
3,4
2,4
1,9
5
3,6
2,9
3,2
2,5
1,8
161
161
169
225
225
261
11,1
11,1
16,7
6
6
9
3
3
4
154
154
157
161
161
169
149
152
152
8
22
8
236
236
283
2,5
2,5
3
0,24
0,33
0,33
2,8
2
2
4,2
3
3
2,8
2
2
for bearings with a cylindrical bore only. Corresponding values for bearings with a tapered bore are listed on page 12, table 2.
21
Sealed SKF Explorer spherical roller bearings
d 150 – 200 mm
B
r1
b
K
r2
r1
r2
d
d d2
D D1
Cylindrical bore
Tapered bore
Principal dimensions
Basic load ratings
dynamic
static
d
C
D
B
mm
150
C0
kN
Fatigue
load
limit
Pu
Limiting
speed
Mass
Designations
Bearings with
cylindrical bore
kN
r/min
kg
–
Bearings with
tapered bore
225
225
56
75
510
655
750
1 040
73,5
100
670
530
7,7
10,5
23030-2CS5/VT143
24030-2CS5/VT143
23030-2CS5K/VT143
–
250
250
80
100
850
1 020
1 200
1 530
114
146
560
400
16
20
23130-2CS5/VT143
24130-2CS5/VT143
23130-2CS5K/VT143
–
270
270
320
73
96
108
850
1080
1 460
1 080
1 460
1 760
102
137
146
630
430
400
18
24,5
43,5
22230-2CS5/VT143
23230-2CS5/VT143
22330-2CS5/VT143
22230-2CS5K/VT143
–
22330-2CS5K/VT143
240
240
60
80
585
750
880
1 200
83
114
670
450
9,7
13
23032-2CS5/VT143
24032-2CS5/VT143
23032-2CS5K/VT143
–
270
270
86
109
980
1 200
1 370
1 760
129
163
530
380
20,5
25
23132-2CS5/VT143
24132-2CS5/VT143
23132-2CS5K/VT143
–
290
340
80
114
1 000
1 600
1 290
1 960
118
160
600
380
22,5
52
22232-2CS5/VT143
22332-2CS5/VT143
22232-2CS5K/VT143
22332-2CS5K/VT143
260
260
67
90
710
930
1 080
1 460
100
137
630
400
13
17,5
23034-2CS5/VT143
24034-2CS5/VT143
23034-2CS5K/VT143
–
280
280
310
88
109
86
1 040
1 220
1 120
1 500
1 860
1 460
137
170
134
480
360
500
22
27,5
28,5
23134-2CS5/VT143
24134-2CS5/VT143
22234-2CS5/VT143
23134-2CS5K/VT143
–
22234-2CS5K/VT143
280
280
74
100
850
1 080
1 270
1 730
114
156
560
380
17
23
23036-2CS5/VT143
24036-2CS5/VT143
23036-2CS5K/VT143
–
300
300
320
96
118
86
1 200
1 400
1 180
1 800
2 160
1 560
160
196
140
430
360
530
28
34,5
29,5
23136-2CS5/VT143
24136-2CS5/VT143
22236-2CS5/VT143
23136-2CS5K/VT143
–
22236-2CS5K/VT143
190
320
320
340
104
128
92
1 400
1 600
1 270
2 080
2 500
1 700
183
212
150
400
340
480
35
43
36,5
23138-2CS5/VT143
24138-2CS5/VT143
22238-2CS5/VT143
23138-2CS5K/VT143
–
22238-2CS5K/VT143
200
310
340
340
82
112
140
1 000
1 600
1 800
1 530
2 360
2 800
137
204
232
480
380
320
23,3
43
53,5
23040-2CS5/VT143
23140-2CS5/VT143
24140-2CS5/VT143
23040-2CS5K/VT143
23140-2CS5K/VT143
–
360
360
98
128
1 460
1 860
1 930
2 700
166
228
430
340
43,5
58
22240-2CS5/VT143
23240-2CS5/VT143
22240-2CS5K/VT143
–
160
170
180
22
ra
ra
da db
Da da
Ba
C
Dimensions
d
d2
~
Abutment and fillet dimensions
D1
~
b
K
r1,21)
min
mm
150
da
min
da
max
db
min
Ba
min
Calculation factors
Da
max
ra
max
mm
e
Y1
Y2
Y0
–
165
162
211
206
8,3
6
4,5
3
2,1
2,1
161
161
165
162
158
–
8
–
214
214
2
2
0,2
0,28
3,4
2,4
5
3,6
3,2
2,5
168
163
226
222
11,1
8,3
6
4,5
2,1
2,1
162
162
168
163
160
–
8
–
238
238
2
2
0,28
0,37
2,4
1,8
3,6
2,7
2,5
1,8
174
171
181
248
243
281
13,9
11,1
16,7
7,5
6
9
3
3
4
164
164
167
174
171
181
160
163
163
15
20
8
256
256
313
2,5
2,5
3
0,24
0,33
0,33
2,8
2
2
4,2
3
3
2,8
2
2
177
173
225
218
11,1
8,3
6
4,5
2,1
2,1
171
171
177
173
168
–
9
–
229
229
2
2
0,2
0,28
3,4
2,4
5
3,6
3,2
2,5
180
176
244
239
13,9
8,3
7,5
4,5
2,1
2,1
172
172
180
176
170
–
8
–
258
258
2
2
0,28
0,37
2,4
1,8
3,6
2,7
2,5
1,8
185
193
264
296
13,9
16,7
7,5
9
3
4
174
177
185
193
170
174
14
8
276
323
2,5
3
0,25
0,33
2,7
2
4
3
2,5
2
188
184
243
235
11,1
8,3
6
4,5
2,1
2,1
181
181
188
184
179
–
9
–
249
249
2
2
0,22
0,3
3
2,3
4,6
3,4
2,8
2,2
190
185
198
256
248
282
13,9
8,3
16,7
7,5
4,5
9
2,1
2,1
4
182
182
187
190
185
198
180
–
180
8
–
10
268
268
293
2
2
3
0,28
0,37
0,25
2,4
1,8
2,7
3,6
2,7
4
2,5
1,8
2,5
199
194
262
251
13,9
8,3
7,5
4,5
2,1
2,1
191
191
199
194
189
–
9
–
269
269
2
2
0,22
0,31
3
2,2
4,6
3,3
2,8
2,2
202
198
208
272
266
289
13,9
11,1
16,7
7,5
6
9
3
3
4
194
194
197
202
198
208
191
–
191
8
–
18
286
286
303
2,5
2,5
3
0,28
0,37
0,26
2,4
1,8
2,6
3,6
2,7
3,9
2,5
1,8
2,5
190
215
210
220
288
282
306
13,9
11,1
16,7
7,5
8
9
3
3
4
204
204
207
215
210
220
202
–
202
9
–
21
306
306
323
2,5
2,5
3
0,3
0,40
0,26
2,3
1,7
2,6
3,4
2,5
3,9
2,2
1,6
2,5
200
223
227
221
286
306
294
13,9
16,7
11,1
7,5
9
6
2,1
3
3
211
214
214
223
227
221
210
212
–
10
9
–
299
326
326
2
2,5
2,5
0,24
0,31
0,40
2,8
2,2
1,7
4,2
3,3
2,5
2,8
2,2
1,6
232
229
324
320
16,7
16,7
9
9
4
4
217
217
232
229
212
–
24
–
343
343
3
3
0,26
0,35
2,6
1,9
3,9
2,9
2,5
1,8
160
170
180
1) Valid
for bearings with a cylindrical bore only. Corresponding values for bearings with a tapered bore are listed on page 12, table 2.
23
Sealed SKF Explorer spherical roller bearings
d 220 – 400 mm
B
r1
b
K
r2
r1
r2
d
d d2
D D1
Cylindrical bore
Tapered bore
Principal dimensions
Basic load ratings
dynamic
static
d
C
D
B
mm
220
C0
kN
Fatigue
load
limit
Pu
Limiting
speed
Mass
Designations
Bearings with
cylindrical bore
kN
r/min
kg
–
Bearings with
tapered bore
340
370
300
90
120
60
1 220
1 800
546
1 860
2 750
1 080
163
232
93
430
360
600
30,5
53,5
12,5
23044-2CS5/VT143
23144-2CS5/VT143
23944-2CS/VT143
23044-2CS5K/VT143
23144-2CS5K/VT143
–
400
460
108
145
1 760
2 700
2 360
3 450
196
206
380
280
60,5
115
22244-2CS5/VT143
22344-2CS5/VT143
22244-2CS5K/VT143
22344-2CS5K/VT143
240
360
400
92
128
1 290
2 080
2 080
3 200
176
255
499
340
33,5
66,5
23048-2CS5/VT143
23148-2CS5/VT143
23048-2CS5K/VT143
23148-2CS5K/VT143
260
400
440
104
144
1 600
2 550
2 550
3 900
212
290
360
320
47,1
90,5
23052-2CS5/VT143
23152-2CS5/VT143
23052-2CS5K/VT143
23152-2CS5K/VT143
280
460
146
2 650
4 250
335
300
97
23156-2CS5/VT143
23156-2CS5K/VT143
300
500
160
3 200
5 100
380
260
125
23160-2CS5/VT143
23160-2CS5K/VT143
320
540
176
3 750
6 100
440
260
165
23164-2CS5/VT143
23164-2CS5K/VT143
340
580
190
4 250
6 800
480
240
210
23168-2CS5/VT143
23168-2CS5K/VT143
360
600
192
4 300
6 950
490
220
213
23172-2CS5/VT143
23172-2CS5K/VT143
400
650
200
4 650
7 650
530
150
255
23180-2CS5/VT143
23180-2CS5K/VT143
24
ra
ra
da db
Da da
Ba
C
Dimensions
d
d2
~
Abutment and fillet dimensions
D1
~
b
K
r1,21)
min
mm
220
da
min
da
max
db
min
Ba
min
Calculation factors
Da
max
ra
max
mm
e
Y1
Y2
Y0
–
245
249
238
314
322
284
13,9
16,7
8,3
7,5
9
4,5
3
4
2,1
233
237
231
245
249
238
231
233
–
10
10
–
327
353
289
2,5
3
2
0,24
0,28
0,15
2,8
2,4
4,5
4,2
3,6
6,7
2,8
2,5
4,5
257
269
359
407
16,7
22,3
9
12
4
5
237
240
257
269
233
236
21
10
383
440
3
4
0,27
0,31
2,5
2,2
3,7
3,3
2,5
2,2
240
265
270
333
360
13,9
16,7
7,5
9
3
4
253
257
365
270
251
254
11
11
347
383
2,5
3
0,23
0,28
2,9
2,4
4,4
3,6
2,8
2,5
260
289
293
369
398
16,7
16,7
9
9
4
4
275
270
289
293
272
276
11
11
385
423
3
3
0,23
0,3
2,9
2,3
4,4
3,4
2,8
2,2
280
314
417
16,7
9
5
300
314
296
12
440
4
0,3
2,3
3,4
2,2
300
337
450
16,7
9
5
320
337
318
12
480
4
0,3
2,3
3,4
2,2
320
361
483
22,3
12
5
340
361
338
13
520
4
0,3
2,3
3,4
2,2
340
385
517
22,3
12
5
360
385
360
14
560
4
0,31
2,2
3,2
2,2
360
408
542
22,3
12
5
380
408
380
14
580
4
0,28
2,4
3,6
2,5
400
457
588
22,3
12
6
426
457
421
15
624
5
0,28
2,4
3,6
2,5
1) Valid
for bearings with a cylindrical bore only. Corresponding values for bearings with a tapered bore are listed on page 12, table 2.
25
SKF – the knowledge engineering
company
From the company that invented the selfaligning ball bearing more than 100 years
ago, SKF has evolved into a knowledge
engineering company that is able to draw on
five technology platforms to create unique
solutions for its customers. These platforms
include bearings, bearing units and seals, of
course, but extend to other areas including:
lubricants and lubrication systems, critical
for long bearing life in many applications;
mechatronics that combine mechanical and
electronics knowledge into systems for more
effective linear motion and sensorized solutions; and a full range of services, from design and logistics support to condition monitoring and reliability systems.
Though the scope has broadened, SKF
continues to maintain the world’s leadership
in the design, manufacture and marketing of
rolling bearings, as well as complementary
products such as radial seals. SKF also holds
an increasingly important position in the
market for linear motion products, highprecision aerospace bearings, machine tool
spindles and plant maintenance services.
The SKF Group is globally certified to ISO
14001, the international standard for environmental management, as well as OHSAS
18001, the health and safety management
standard. Individual divisions have been
approved for quality certification in accordance with ISO 9001 and other customer
specific requirements.
With over 100 manufacturing sites worldwide and sales companies in 70 countries,
SKF is a truly international corporation. In
addition, our distributors and dealers in
some 15 000 locations around the world,
an e-business marketplace and a global
distribution system put SKF close to customers for the supply of both products and
services. In essence, SKF solutions are available wherever and whenever customers
need them. Overall, the SKF brand and the
corporation are stronger than ever. As the
knowledge engineering company, we stand
ready to serve you with world-class product
competencies, intellectual resources, and
the vision to help you succeed.
© Airbus – photo: exm company, H. Goussé
Evolving by-wire technology
SKF has a unique expertise in the fast-growing bywire technology, from fly-by-wire, to drive-bywire, to work-by-wire. SKF pioneered practical flyby-wire technology and is a close working partner
with all aerospace industry leaders. As an example,
virtually all aircraft of the Airbus design use SKF
by-wire systems for cockpit flight control.
SKF is also a leader in automotive by-wire technology, and has partnered with automotive engineers to develop two concept cars, which employ
SKF mechatronics for steering and braking. Further by-wire development has led SKF to produce
an all-electric forklift truck, which uses mechatronics rather than hydraulics for all controls.
Seals
Bearings
and units
Mechatronics
26
Lubrication
systems
Services
Harnessing wind power
The growing industry of wind-generated electric power provides a source of
clean, green electricity. SKF is working closely with global industry leaders to
develop efficient and trouble-free turbines, providing a wide range of large,
highly specialized bearings and condition monitoring systems to extend equipment life of wind farms located in even the most remote and inhospitable
environments.
Working in extreme environments
In frigid winters, especially in northern countries, extreme sub-zero temperatures can cause bearings in railway axleboxes to seize due to lubrication starvation. SKF created a new family of synthetic lubricants formulated to retain
their lubrication viscosity even at these extreme temperatures. SKF knowledge
enables manufacturers and end user customers to overcome the performance
issues resulting from extreme temperatures, whether hot or cold. For example,
SKF products are at work in diverse environments such as baking ovens and
instant freezing in food processing plants.
D
Developing a cleaner cleaner
The electric motor and its bearings are the heart of many household appliances. SKF works closely with appliance manufacturers to improve their products’ performance, cut costs, reduce weight, and reduce energy consumption.
A recent example of this cooperation is a new generation of vacuum cleaners
with substantially more suction. SKF knowledge in the area of small bearing
technology is also applied to manufacturers of power tools and office
equipment.
Maintaining a 350 km/h R&D lab
In addition to SKF’s renowned research and development facilities in Europe
and the United States, Formula One car racing provides a unique environment
for SKF to push the limits of bearing technology. For over 60 years, SKF products, engineering and knowledge have helped make Scuderia Ferrari a formidable force in F1 racing. (The average racing Ferrari utilizes around 150 SKF
components.) Lessons learned here are applied to the products we provide to
automakers and the aftermarket worldwide.
Delivering Asset Efficiency Optimization
Through SKF Reliability Systems, SKF provides a comprehensive range of
asset efficiency products and services, from condition monitoring hardware
and software to maintenance strategies, engineering assistance and machine
reliability programmes. To optimize efficiency and boost productivity, some
industrial facilities opt for an Integrated Maintenance Solution, in which SKF
delivers all services under one fixed-fee, performance-based contract.
Planning for sustainable growth
By their very nature, bearings make a positive contribution to the natural
environment, enabling machinery to operate more efficiently, consume less
power, and require less lubrication. By raising the performance bar for our
own products, SKF is enabling a new generation of high-efficiency products
and equipment. With an eye to the future and the world we will leave to our
children, the SKF Group policy on environment, health and safety, as well as
the manufacturing techniques, are planned and implemented to help protect
and preserve the earth’s limited natural resources. We remain committed to
sustainable, environmentally responsible growth.
27
The Power of Knowledge Engineering
Seals
Bearings
and units
Mechatronics
Lubrication
systems
Services
Drawing on five areas of competence and application-specific expertise amassed over more than 100
years, SKF brings innovative solutions to OEMs and production facilities in every major industry worldwide. These five competence areas include bearings and units, seals, lubrication systems, mechatronics
(combining mechanics and electronics into intelligent systems), and a wide range of services, from 3-D
computer modelling to advanced condition monitoring and reliability and asset management systems.
A global presence provides SKF customers uniform quality standards and worldwide product availability.
® SKF is a registered trademark of the SKF Group.
™ SKF EXPLORER is a trademark of the SKF Group.
© SKF Group 2013
The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be
accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein.
PUB BU/P2 10704/I · April 2013
Certain image(s) used under license from Shutterstock.com
skf.com
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