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Mounting
6.3 Thread sizes and tightening torques for fastening bolts
NOTICE
Violation of the maximum permissible oil sump temperature
The oil sump temperature will be exceeded if the temperature monitoring equipment is
incorrectly set.
A warning must be given when the maximum permissible oil sump temperature is reached. The
geared motor must be switched off when the maximum permissible temperature is exceeded.
The machine will come to a standstill if the geared motor is shut down.
Exercise particular care when mounting and installing. The manufacturer cannot be held
liable for damage caused by incorrect mounting and installation.
Ensure that there is space around the gearbox or geared motor for mounting, maintenance
and repair.
On geared motors with a fan, leave sufficient free space for the entry of air. Observe the
installation conditions for the geared motor.
Provide adequate hoisting gear at the start of mounting and installation work.
Observe the mounting position specified on the rating plate. This ensures that it will be
provided with the correct quantity of lubricant.
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.
6.3
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 6-1
Thread size
M4
M5
M6
M8
M10
M12
M16
M20
M24
40
Tightening torques for fixing screws
Tightening torque for property class
8.8
Nm
3
6
10
25
50
90
210
450
750
10.9
Nm
4
9
15
35
70
120
295
580
1 000
SIMOGEAR electric monorail gearbox
Operating Instructions, 01/2024, A5E53220855A/RS-AA
12.9
Nm
5
10
18
41
85
145
355
690
1 200
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