Slew Drives
Installation and commissioning
32
The end customer or the operating company must be instructed
which tightening process was used. The process must also be
used when servicing the unit to check the bolted union.
Tightening torque M
A
in Nm with incremental tightening
Step 1
30%
Step 2
80%
Step 3
100%
Mounting bolt
dimensions
Tightening torque M
A
in Nm
Strength class 10.9
M6 3.50 9.20 11.5
M8 8.40 22.4 28.0
M10 16.7 44.6 55.8
M12 29.3 78.2 97.7
M16 73.8 197 246
M20 144 385 481
M24 249 664 830
M30 498 1329 1661
Tab. 12
Tightening torque M
A
in Nm with incremental tightening
Step 1
30%
Step 2
80%
Step 3
100%
Mounting bolt
dimensions
Tightening torque M
A
in Nm
Strength class SAE Grade 8
1/4 - 20 UNC 3.50 9.30 11.6
5/16 - 18 UNC 7.30 19.4 24.3
3/8 - 16 UNC 13.1 34.9 43.6
7/16 - 14 UNC 21.1 56.2 70.2
5/8 - 11 UNC 64.4 172 215
3/4 - 10 UNC 115 308 385
7/8 - 9 UNC 187 498 622
1 1/8 - 7 UNC 397 1060 1324
Tab. 13
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