Maintenance
79
Tightening torques
for screwed
connections
All screwed connections must be tightened in accordance with the ta-
ble below, if no other torques are specified. On this machine, bolts with
a minimum quality of "8.8" (can be seen on the bolt head) are used.
The torque specifications refer to a dry coefficient of friction (0.12).
Tighten safety bolts and nuts with a 10% higher value.
Bolt size
Bolt quality
8.8
10.9
12.9
M 6
9.9 Nm (7.3 ft.lbs)
14 Nm (10.3 ft.lbs)
17 Nm (12.5 ft.lbs)
M 8
24 Nm (17.7 ft.lbs)
34 Nm (25 ft.lbs)
41 Nm (30.3 ft.lbs)
M 10
48 Nm (35.4 ft.lbs)
68 Nm (50.2 ft.lbs)
81 Nm (59.8 ft.lbs)
M 12
85 Nm (62.7 ft.lbs)
120 Nm (88.6 ft.lbs)
145 Nm (107 ft.lbs)
M 14
135 Nm (99.6 ft.lbs)
190 Nm (140 ft.lbs)
230 Nm (166 ft.lbs)
M 16
210 Nm (155 ft.lbs)
290 Nm (214 ft.lbs)
350 Nm (258 ft.lbs)
M 20
410 Nm (302 ft.lbs)
580 Nm (428 ft.lbs)
690 Nm (509 ft.lbs)
