Maintenance
73
Tightening
torques
All screwed joints on this machine must be torqued in accordance with
the values given in this table below unless indicated otherwise.
On this machine, 8.8 is both standard and minimum quality used. If not
indicated anyhow use this quality for determination of torque (in most
cases the quality can be found on the head of the respective bolt).
* Values in brackets = spanner size of lock bolts and nuts with toothed
flange are given in brackets if different from standard.
T
IP
• The listed values are applicable for dry or slightly oiled joints
• Do not use plated bolts/screws/nuts without grease
• When a stiff grease is applied decrease the given value by 10%
• In case lock nuts, lock screws or lock bolts are used increase the
given value by 10%
Thread Torque value Spanner
size*
8.8 10.9 12.9
Nm mm
M3 1.3 1.8 2.1 6
M4 2.9 4.1 1.9 7
M5 5.7 8.1 9.7 8
M6 9.9 14 17 10
M8 24 34 41 13
M10 48 68 81 17 (15)
M12 85 120 145 19 (17)
M14 135 190 225 22 (19)
M16 210 290 350 24 (22)
M18 290 400 480 27
M20 400 570 680 30
M20 x 1.5 - 640 - 30
M22 550 770 920 32
M24 700 980 1180 36
M27 1040 1460 1750 41
M30 1410 1980 2350 46
M33 1910 2700 3200 50
M36 2450 2546 3063 55
M39 3200 4500 5400 60
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