KTR clamping nut
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
47112 EN
1 of 7
6
KTR clamping nut
The KTR clamping nut generates a big screw preload force by tightening the pressure screws at a
relatively small tightening torque.
Table of contents
1
Technical data
2
2
Advice
2
2.1
2.2
2.3
2.4
General advice
Safety and advice symbols
General hazard warnings
Intended use
2
3
3
3
Storage, transport and packaging
4
3.1
3.2
4
4
3
4
Storage
Transport and packaging
Assembly
4
4.1
4.2
4.3
4.4
4
5
6
7
Components of the KTR clamping nut
Assembly of the clamping nut
Disassembly of clamping nut
Maintenance and service
5
Disposal
7
6
Spares inventory, customer service addresses
7
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-11-10 Kb/Ost
2016-11-17 Kb
Replacing:
Replaced by:
KTR-N dated 11.09.08
KTR-N
Sheet:
Edition:
KTR clamping nut
Operating/Assembly instructions
1
47112 EN
2 of 7
6
Technical data
Illustration 1: Dimensions
Illustration 2: Operating principle
Table 1: Dimensions
Dimensions [mm]
Size
1)
M24
M27
M30
M33
M36
M42
M48
M52
M56
M60
M64
M72
M80
1)
2)
2
D
DT
B
B1
s
k
52
57
65
68
80
86
90
100
108
112
120
142
164
39
42
48
51
58
64
72
79
83
86
92
107
122
36
41
43
48
50
55
60
66.5
75.5
80.5
84
98
103
20
25
25
30
30
35
40
42
45
48
52
58
64
3
3
3
3
3
3
3
4.5
4.5
4.5
8
8
8
1–2
1–2
1–2
1–2
1–2
1–2
1–2
1–2
1–2
1–2
1–2
1–2
1–2
Pressure screw
2)
Component 1.3
DIN EN ISO
Quantity
4762 – 12.9
M8
M8
M10
M10
M12
M12
M12
M12
M16
M16
M16
M20
M20
8
9
8
9
8
10
11
13
9
10
11
10
12
Coarse and fine threads
Description of components following chapter 4.1.
Advice
2.1 General advice
Please read through these operating/assembly instructions carefully before you start up the power pack with the
clamping nut installed. Please pay special attention to the safety instructions!
The operating/assembly instructions are part of your product. Please store them carefully and close to the clamping nut. The copyright for these operating/assembly instructions remains with KTR.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-11-10 Kb/Ost
2016-11-17 Kb
Replacing:
Replaced by:
KTR-N dated 11.09.08
KTR clamping nut
Operating/Assembly instructions
2
KTR-N
Sheet:
Edition:
47112 EN
3 of 7
6
Advice
2.2 Safety and advice symbols
STOP
!
Warning of personal injury
This symbol indicates notes which may contribute to preventing bodily injuries or serious bodily injuries that may
result in death.
Warning of product damages
This symbol indicates notes which may contribute to preventing material or machine damage.
General advice
This symbol indicates notes which may contribute to preventing adverse results or conditions.
2.3 General hazard warnings
STOP
With assembly and disassembly and maintenance of the clamping nut it has to be made
sure that the entire power pack is secured against accidental switch-on. You may be seriously hurt by rotating parts or parts falling down. Please make absolutely sure to read
through and observe the following safety indications.
All operations on and with the clamping nut have to be performed taking into account "safety first".
Please make sure to switch off the power pack which the clamping nuts are mounted on before you perform
your work.
Secure the power pack against accidental switch-on, e. g. by providing warning signs at the place of switch-on
or removing the fuse for current supply.
Do not reach into the operating area of rotating parts as long as they are in operation.
Please secure rotating parts against accidental contact. Please provide for the necessary protection devices
and covers.
Components falling down may cause injury to persons or damage on the machine. Secure the components
with assembly or disassembly.
2.4 Intended use
You may only assemble, disassemble and maintain the clamping nut if you
have carefully read through the operating/assembly instructions and understood them
had technical training
are authorized by your company
The clamping nut may be used in accordance with the technical data only (see table 1 and 2). Unauthorized modifications on the clamping nut are not admissible. We will not assume liability for any damage that may arise. In the
interest of further development we reserve the right for technical modifications.
The KTR clamping nut described in here corresponds to the technical status at the time of printing of these operating/assembly instructions.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-11-10 Kb/Ost
2016-11-17 Kb
Replacing:
Replaced by:
KTR-N dated 11.09.08
KTR clamping nut
Operating/Assembly instructions
3
KTR-N
Sheet:
Edition:
47112 EN
4 of 7
6
Storage, transport and packaging
3.1 Storage
The clamping nuts are supplied in preserved condition and can be stored at a roofed and dry place for
6 - 9 months.
Humid storage rooms are not suitable.
Please make sure that condensation is not generated.
!
3.2 Transport and packaging
In order to avoid any injuries and any kind of damage please always make use of proper
transport and lifting equipment.
!
The clamping nuts are packed differently each depending on size, quantity and kind of transport. Unless otherwise contractually agreed, packaging will follow the in-house packaging specifications of KTR.
4
Assembly
4.1 Components of the KTR clamping nut
Components of the KTR clamping nut
1)
2)
Component
Quantity
Description
1
1
KTR clamping nut
1.1
1
Nut
1.2
1
Washer
1.3
1)
Pressure screw
2
2)
Screw
Quantity depends on the size of clamping nut (table 1).
Optionally available with dowel screw or dowel pin.
Illustration 3: Components of the KTR clamping nut
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-11-10 Kb/Ost
2016-11-17 Kb
Replacing:
Replaced by:
KTR-N dated 11.09.08
KTR-N
Sheet:
Edition:
KTR clamping nut
Operating/Assembly instructions
4
47112 EN
5 of 7
6
Assembly
4.2 Assembly of the clamping nut
Clean and degrease the thread of the clamping nut and screws (component 1.3 and 2).
If the components are mounted with several clamping nuts (e. g. flange connections), each
of the following steps on all clamping nuts must be completed before the next step follows.
The clamping screws (component 1.3) in the clamping nut must not jut out the pressure side (illustration 4).
Shift the washer (component 1.2) onto the screw (component 2) up to the contact surface of the adjacent
component. Afterwards screw on the nut (component 1.1) and hand-tighten it (see illustration 4).
All components must be superimposed without any gap (illustration 4).
!
Illustration 4:
Illustration 5:
Afterwards turn back the nut (component 1.1) until there is a gap of 1 - 2 mm (illustration 5).
Hand-tighten the pressure screws marked in illustration 6.
Tighten these screws (illustration 6) at half the tightening torque according to table 2 and afterwards at the full
tightening torque according to table 2.
Now tighten all pressure screws one after another and with several revolutions until all screws have achieved
the full tightening torque.
pitch 8
pitch 9
pitch 10
pitch 11
pitch 12
pitch 13
pitch 12
pitch 13
Illustration 6: Tightening of pressure screws
pitch 8
pitch 9
pitch 10
pitch 11
Illustration 7: Tightening of pressure screws (one after another)
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-11-10 Kb/Ost
2016-11-17 Kb
Replacing:
Replaced by:
KTR-N dated 11.09.08
KTR clamping nut
Operating/Assembly instructions
4
KTR-N
Sheet:
Edition:
47112 EN
6 of 7
6
Assembly
4.2 Assembly of the clamping nut
The pressure screws must not bear on the heads after assembly (see illustration 8).
!
Illustration 8
Table 2: Tightening torques and screw pre-load
1)
Property class 8.8
Screw (component 2)
Tightening torque TA
[Nm]
Screw pre-load [kN]
Per pressure screw
Component 1.3
21
174
24
224
41
274
45
338
71
396
78
544
94
721
95
862
210
1001
215
1139
225
1311
400
1696
420
2137
Size
M24
M27
M30
M33
M36
M42
M48
M52
M56
M60
M64
M72
M80
1)
Property class 10.9
Screw (component 2)
Tightening torque TA
[Nm]
Screw pre-load [kN]
Per pressure screw
Component 1.3
30
249
30
280
60
401
60
451
105
586
105
732
105
806
105
952
250
1192
250
1325
250
1457
490
2077
490
2493
1) same or higher
4.3 Disassembly of clamping nut
Untighten the pressure screws of the clamping nut with several revolutions by a quarter revolution until all
screws are released from tension.
If components with several clamping nuts are disassembled (e. g. flange connections), each revolution (see above) must be performed one after the other on every clamping nut before the next
revolution is started with.
The clamping nuts must not be disassembled individually.
Do not relieve and unscrew individual pressure screws completely in any case.
!
Unscrew the clamping nut and remove the washer.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-11-10 Kb/Ost
2016-11-17 Kb
Replacing:
Replaced by:
KTR-N dated 11.09.08
KTR clamping nut
Operating/Assembly instructions
4
KTR-N
Sheet:
Edition:
47112 EN
7 of 7
6
Assembly
4.4 Maintenance and service
The KTR clamping nuts have to be inspected after 500 hours of operation for the first time and afterwards at least
once a year. Please pay special attention to the condition of the screwing.
!
5
After start-up of the machine the tightening torques of the clamping nuts' pressure screws
have to be inspected during usual maintenance intervals.
Disposal
In respect of environmental protection we would ask you to dispose of the packaging or products on termination of
their service life in accordance with the legal regulations and standards that apply, respectively.
All components of the clamping nut consist of metal. Any metal components have to be cleaned and disposed of
by scrap metal.
6
Spares inventory, customer service addresses
A basic requirement to ensure the readiness for use of the drive components is a stock of some clamping nuts on
site.
Contact addresses of the KTR partners for spare parts and orders can be obtained from the KTR homepage at
www.ktr.com.
!
KTR does not assume any liability or warranty for the use of spare parts and accessories
which are not provided by KTR and for the damages which may incur as a result.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-11-10 Kb/Ost
2016-11-17 Kb
Replacing:
Replaced by:
KTR-N dated 11.09.08
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