OPERATING MANUAL NBS APPENDIX
ThyssenKrupp Aufzugswerke GmbH
8. Appendix
8.1 Tightening torques – tightness values
NB: when working on the machine or replacing parts,
it must be ensured that the prescribed bolt / screw tightness and
tightening torques are complied with.
On installation, the screws are to be secured
against inadvertent loosening using detent edged washers.
The following values apply for:
Allen screws ISO 4762 (DIN 912)
Hexagon screws ISO 4014 / 4017 (DIN 931 / 933)
Unless special values are stipulated in the assembly descriptions.
The screws are to be tightened with a torque wrench!
Dimensions Tightening torque M
A
(Nm)
Tightness 8.8 10.9 12.9
M4 2.6
M5 5.3
M6 9.0 12 15
M8 23 30 35
M10 45 60 75
M12 75 110 130
M16 190 270 320
M20
370 520 620
M24 640 900 1100
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