5 | Installation
07/2023 | ID 443360_en.00
23
5.5 Tightening torques
Note that the following tightening torques apply to screws that are used for mounting the motor on the gear unit or the
gear unit on the machine. For clamp couplings, clamping screws of shrink rings and other connection elements, other
tightening torques apply that are specified in the specific context.
Tightening torque M
A
[Nm]
Thread Strength class 8.8 Strength class 10.9 Strength class 12.9
M4 3.3 4.8 5.6
M5 6.5 9.5 11.2
M6 11.3 16.5 19.3
M8 27.3 40.1 46.9
M10 54 79 93
M12 93 137 160
M14 148 218 255
M16 230 338 395
M18 329 469 549
M20 464 661 773
M22 634 904 1057
M24 798 1136 1329
M27 1176 1674 1959
M30 1597 2274 2662
M36 2778 3957 4631
Tab. 2: Tightening torques for screws with metric standard thread in accordance with DIN 13-1 (coefficient of friction µ
ges
=
0.14).
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