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On geared motors with a fan, leave sufficient free space for the entry of air. Observe the
installation conditions for the geared motor.
Provide sufficient lifting gear at the start of mounting and fitting work.
Observe the mounting position specified on the rating plate. This ensures that the correct
quantity of lubricant is provided.
Use all the fastening means that have been assigned to the particular mounting position and
mounting type.
Cap bolts cannot be used in some cases due to a lack of space. In such cases, please contact
Technical Support quoting the type of gearbox.
4.3
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 4- 1
Thread size
M4
M5
M6
M8
M10
M12
M16
M20
M24
M30
M36
BA 2030
Operating Instructions, 02/2021, A5E37880173A/RS-AM
4.3 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
750
1 500
2 500
10.9
Nm
4
9
15
35
70
120
295
580
1 000
2 000
3 600
Installation
12.9
Nm
5
10
18
41
85
145
355
690
1 200
2 400
4 200
31
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