Checking The Tightness Of Fastening Bolts; Thread Sizes And Tightening Torques For Fastening Bolts - Siemens SIMOGEAR BA 2535 Mounting And Operating Instructions

NOTICE
Dust deposits cause higher housing temperatures
Dust deposits prevent heat from being radiated.
Keep the drive free from dirt and dust.
NOTICE
Cleaning with a high-pressure cleaning appliance
Water penetrates the geared motor. Seals are damaged.
Do not use a high-pressure cleaning appliance to clean the geared motor.
Do not use tools with sharp edges.
De-energize the drive unit when cleaning the drive unit.
10.7

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 unit. Check all fastening bolts for tightness using a
torque wrench.
10.8

Thread sizes and tightening torques for fastening bolts

The general tolerance for the tightening torque is 10%. The tightening torque is based on a
friction coefficient of μ = 0.14.
Table 10-7
Thread size
M4
M5
M6
M8
M10
M12
M16
M20
SIMOGEAR electric monorail gearbox
Operating Instructions, 01/2024, A5E53220855A/RS-AA
10.8 Thread sizes and tightening torques for fastening bolts
Tightening torques for fixing screws
Tightening torque for property class
8.8
Nm
3
6
10
25
50
90
210
450
Service and maintenance
10.9
Nm
4
9
15
35
70
120
295
580
12.9
Nm
5
10
18
41
85
145
355
690
67