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11 Maintenance and servicing
11.1 Screw fittings
Check bolts and nuts for tightness after five hours of operation for the
first time, then regularly (every 50 hours) and retighten if necessary.
• All torques TA are standard values for standard metric threads accor-
ding to DIN. Coefficient of friction 0.14 - new screws - unlubricated.
These values have been recommended as standard values by various
screw manufacturers. We cannot assume any liability for the application.
• Self-locking nuts must be replaced after each disassembly.
Thread
3.6
5.6
6.8
8.8
10.9
12.9
M6
3.43
4.51
8.73
10.3
14.71
17.65
M8
8.24
10.79
21.57
25.50
35.30
42.17
M10
16.67
21.57
42.17
50.01
70.61
85.32
M12
28.44
38.25
73.55
87.28
122.58 147.10
M14
45.11
60.80
116.70 135.27 194.17 235.36
M16
69.63
93.16
178.46 210.84 299.10 357.94
M18
95.13
127.40 245.17 289.30 411.88 490.34
M20
135.33 180.44 348.14 411.88 576.50 669.26
M22
162.40 245.17 470.72 558.98 784.45 941.44
Torque for screwls TA
