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Technical data
B.1
Tightening torques for screw and bolt connections
Bolt locking devices
● Refit nuts or bolts that are mounted together with locking, resilient, and/or force-distributing
● When screwing together threads secured with a liquid adhesive, use a suitable medium
● Always use suitable securing devices or removable adhesives (e.g., Loctite 243) when
Tightening torques
The bolted connections with metal contact surfaces, such as end shields, bearing cartridge
parts, terminal box parts bolted onto the stator frame, should be tightened to the following
torques, depending on the thread size:
Table B-1
Tightening torques for bolted connections with a tolerance of ±10%.
Case
M4
M5
A
1.2
2.5
B
1.3
2.6
C
3
5
SIMOTICS TN Series N-compact 1LH8
Operating Instructions 06/2017
elements with identical, fully-functional elements when re-assembling. Always renew keyed
elements.
such as Loctite 243.
installing fixing bolts with a clamping length of less than 25 mm. The clamping length is
taken as the distance between the head of the bolt and the point at which the bolt is screwed
in.
M6
M8
M10
4
8
13
4.5
11
22
8
20
40
M12
M16
M20
M24
20
40
52
80
38
92
180
310
70
170
340
600
M30
M36
M42
M48
150
-
-
620
1080
1700
2600
1200
2000
3100
4700
B
M56
-
-
Nm
4200
Nm
7500
Nm
131
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