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
Tightening torques for fixing screws
Thread size
Tightening torque for property 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
1 000
1 200
M30
1 500
2 000
2 400
M36
2 500
3 600
4 200
4.4
Mounting an input or output element on the gearbox shaft
WARNING
Risk of burns caused by hot parts
Do not touch the gearbox without protection.
NOTICE
Damage to shaft sealing rings caused by solvent
Avoid contact of solvent or benzine with the shaft sealing rings.
NOTICE
Damage to shaft sealing rings caused by heating
Use thermal shields to protect shaft sealing rings from heating above 100 °C due to radiant
heat.
Installing
4.4 Mounting an input or output element on the gearbox shaft
SIMOGEAR adapters for gearboxes - KS, K2, K3, K4, K5, KQ, KQS, K8, A, AZ
Operating Instructions, 05/2022, A5E37431501A/RS-AL
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