Technical data
B
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
elements with identical, fully-functional elements when re-assembling. Always renew keyed
elements.
● When screwing together threads secured with a liquid adhesive, use a suitable medium
such as Loctite 243.
● Always use suitable securing devices or removable adhesives (e.g., Loctite 243) when
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.
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
M6
M8
M10
M12
M16
M20
M24
M30
M36
M42
M48
M56
A
1.2
2.5
4
8
13
20
40
52
80
150
-
-
-
-
Nm
B
1.3
2.6
4.5
11
22
38
92
180
310
620
1080 1700 2600 4200 Nm
C
3
5
8
20
40
70
170
340
600
1200 2000 3100 4700 7500 Nm
SIMOTICS T-1FW4 Heavy Duty 1FW4407-1KM81-1BC0-Z
Operating Instructions 11/2018
105
