5 | Installation
28
10/2019 | ID 443149_en.00
Gear unit type
Number of screws
Screw size
Min. screw-in depth
[mm]
Strength class
PHQ9
32
M12
–
12.9
PHQ10
32
M12
–
12.9
PHQ11
24
M16
–
12.9
PHQ12
24
M20
–
12.9
Tab. 7: Information on screws for mounting the gear unit housing on the machine
5.6
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. 8: Tightening torques for screws with metric standard thread in accordance with DIN 13-1 (coefficient of friction µ
ges
=
0.14).
