Slew Drives
Installation and commissioning
33
Tightening torque M
A
in ft-lbs with incremental tightening
Step 1
30%
Step 2
80%
Step 3
100%
Mounting bolt
dimensions
Tightening torque M
A
in ft-lbs
Strength class 10.9
M6 2.50 6.80 8.50
M8 6.20 16.5 20.7
M10 12.3 33.0 41.2
M12 21.6 57.6 72.0
M16 54.3 145 181
M20 107 284 355
M24 184 490 612
M30 368 980 1225
Tab. 14
Tightening torque M
A
in ft-lbs with incremental tightening
Step 1
30%
Step 2
80%
Step 3
100%
Mounting bolt
dimensions
Tightening torque M
A
in ft-lbs
Strength class SAE Grade 8
1/4 - 20 UNC 2.60 6.90 8.60
5/16 - 18 UNC 5.40 14.4 18.0
3/8 - 16 UNC 9.70 25.8 32.3
7/16 - 14 UNC 15.6 41.6 52.0
5/8 - 11 UNC 47.7 127 159
3/4 - 10 UNC 85.5 228 285
7/8 - 9 UNC 138 369 461
1 1/8 - 7 UNC 294 785 981
Tab. 15
5.3.4 Determining the tilting clearance
Tilting clearance increases as raceway system wear increases. To
determine the increase in tilting clearance a basic measurement
must be executed in installed status and prior to first-time
operation. This is the only way to determine changes.
Fig. 23: Determine tilting clearance
1 Upper mounting structure
2 Tilting direction
3 Main load-carrying zone
4 Lower mounting structure
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