Maintenance manual
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10.
Tightening Torque for Bolts
Note!
Make sure to follow recommended tightening torque and friction coefficient as described
below.
A friction coefficient
μ
= 0,15 - normally oiled threads, is assumed in the calculations of the preceding
tightening torques. For other values of the friction coefficient, the tightening torques should be
adjusted accordingly.
Torque for bolts with normally oiled threads:
Dim
Qual
Nm
M 10
8.8
50
M 12
8.8
86
M 16
8.8
215
M 20
8.8
410
M 24
8.8
710
M 30
8.8
1400
Dim
Qual
Nm
M 10
12.9
84
M 12
12.9
145
M 16
12.9
360
M 20
12.9
700
M 24
12.9
1243
M 30
12.9
2400
Torque for actuator cover bolts using Molykote G Rapid+:
Dim
Qual
Nm
M 24
8.8
500
M 30
8.8
1000
M 36
8.8
1600
Dim
Qual
Nm
M 24
12.9
650
M 30
12.9
1250
M 36
12.9
1625
Torque for actuator stay bolts using Molykote G Rapid+:
Dim
Qual
Nm
M 24
12.9
700
M 30
12.9
1350
M 36
12.9
2100
M 42
12.9
3700