LP
+
/LPB
+
Technical data sheets
Revision: 03
2022-D039182
en-11
3.11
Tightening torques for common thread sizes in general mechanics
The specified tightening torques for headless screws and nuts are calculated values and are based
on the following conditions:
- Calculation acc. VDI 2230 (Issue February 2003)
- Friction value for thread and contact surfaces
μ
=0.10
- Exploitation of the yield stress 90 %
3.12
Performance statistics
Refer to our catalogue or our Internet page for the maximum permitted speeds and torques:
http://www.wittenstein-alpha.de
3.13
Supplementary information
Gearhead
size LPB
+
Bore Ø
[mm]
Bolt size /
property class
Tightening torque
[Nm]
070
82
M8 / 12.9
37.3
090
106
M10 / 12.9
73.4
120
144
M12 / 12.9
126
Tbl-13: Through-holes in gearhead housing LPB
+
Tightening torque [Nm] for threads
Property
class
Screw / nut
M3
M4
M5
M6
M8
M10 M12 M14 M16 M18 M20 M22
M24
8.8 / 8
1.15 2.64 5.24 8.99 21.7 42.7 73.5 118 180 258 363 493
625
10.9 / 10
1.68 3.88 7.69 13.2 31.9 62.7 108 173 265 368 516 702
890
12.9 / 12
1.97 4.55 9.00 15.4 37.3 73.4 126 203 310 431 604 821 1042
Tbl-14: Tightening torques for headless screws and nuts
Consult our Customer Service department if the gearhead is older
than a year. You will then receive the valid performance data.
The complete operating manual can be found on our website:
www.wittenstein-alpha.de/en/operating-manuals
or scan this code, to receive the detailed operating manual directly
as a PDF (max. 1 MB).
