Siemens SIMOGEAR BA 2030 - Checking the Tightness of Fastening Bolts

Service and maintenance
8.9 Checking the tightness of fastening bolts
BA 2030 (2KJ4)
Operating Instructions, 07/2020, A5E50009094A/RS-AL
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8.9 Checking the tightness of fastening bolts
Note
Replace damaged headless bolts with new bolts of the same type and strength class.
Switch off the power supply to the drive component. Check all fastening bolts for tightness
using a torque wrench.
The general tolerance for the tightening torque is 10%. The tightening torque is based on a
friction coefficient of μ = 0.14.
Table 8- 10 Tightening torques for fastening bolts
Thread size
Tightening torque for strength class
8.8
10.9
12.9
[Nm]
[Nm]
[Nm]
M4
3
4
5
M5
6
9
10
M6
10
15
18
M8
25
35
41
M10
50
70
85
M12
90
120
145
M16
210
295
355
M20
450
580
690
M24
750
1000
1200
M30
1500
2000
2400
M36
2500
3600
4200