Slew Drives
Installation and commissioning
27
5.2.5
Tightening bolts with a torque wrench
Normally the mounting bolts are adequately secured through
correct pretension.
WARNI
WARNI
WARNI
WARNING
NG
NG
NG
Do not use impact screwdrivers. Using an impact
screwdriver may cause impermissible deviations between
the bolt tightening forces. Failure of the bolted union with
the mounting structure may cause severe personal injury
or material damage.
IMPORTANT
If there are shock loads or vibration additional screw-
locking devices may be necessary. In this case use Loctite
or Nord-Lock® bolt lock washers.
Do not use split rings, spring washers, etc.
Do not reuse bolts, nuts, and washers, etc.
Only use hardened and tempered washers.
Adjust the limit torque in accordance with bolt size and quality.
Use a precisely indicating torque wrench.
Tightening torques and bolt tightening forces for metric
coarse-pitched thread in accordance with DIN 13 when
using a torque wrench:
Tightening torque
M
A
1)
Strength class 10.9
in
Mounting pretension
force
F
M
2)
Strength class 10.9
in
Mounting
bolt
dimensions
Nm
ft-lbs
kN
lbs
M4
3.31
2.44
5.95
1338
M5
6.77
4.99
9.74
2190
M6
11.5
8.5
13.7
3080
M8
28.0
20.6
25.2
5665
M10
55.8
41.2
40.2
9037
M12
97.7
72.1
58.5
13151
M16
246
181
111
24954
M18
336
248
134
30124
M20
481
355
173
38892
M22
661
487
216
48559
M24
830
612
249
55977
M27
1230
907
328
73737
M30
1661
1225
398
89474
Tab. 8
1)
M
A
in accordance with VDI guideline 2230 (February 2003) for
µK=0.08 and µG=0.12
2)
F
M
in accordance with VDI guideline 2230 (February 2003) for
µG=0.12