Technical data sheets
TP
+
en-10
2022-D036009
Revision: 03
3.11
Specifications on mounting on the gear output side
3.12
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 %
Thread in output flange
Gearhead size
/ Design TP
+
Bore Ø
[mm]
Quantity x Thread x
Depth
[ ] x [mm] x [mm]
Tightening torque
[Nm]
Property class 12.9
004 MF
31.5
8 x M5 x 7
9
010 MF
50
8 x M6 x 10
15.4
025 MF
63
12 x M6 x 12
15.4
050 MF
80
12 x M8 x 15
37.3
110 MF
125
12 x M10 x 20
73.4
300 MF
140
12 x M16 x 31
310
500 MF
160
12 x M20 x 31
604
010 MA
50
12 x M6 x 10
15.4
025 MA
63
12 x M8 x 12
37.3
050 MA
80
12 x M10 x 15
73.4
110 MA
125
12 x M12 x 19
126
300 MA
145
12 x M20 x 31
604
500 MA
166
12 x M24 x 37
1042
MA = HIGH TORQUE
Tbl-10: Specifications on mounting on the gear output side
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-11: Tightening torques for headless screws and nuts
