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
WARNIWARNI
WARNING
NGNG
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
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