IMO WD-L - Page 29

Slew Drives
Installation and commissioning
29
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WARNING
NGNG
NG
The prescribed hydraulic pressure should not be exceeded
when pretensioning the bolts. Excess hydraulic pressure
may cause failure of the bolted union with the mounting
structure and may cause severe personal injury or material
damage.
IMPORTANT
When using other threaded bolts or other strength classes
you have to contact our customer service (

 page 2).
Bolt tension forces when using a hydraulic bolt-tensioning
cylinder for metric coarse-pitched thread in accordance
with DIN 13:
Mounting pretension force
F
M
1)
Strength class 10.9
in
Mounting bolt
dimensions
kN lbs
M24 282 63396
M27 367 82505
M30 448 100714
M33 554 124544
M36 653 146800
M42 896 201429
M45 1043 234476
M48 1177 264600
M52 1405 315857
M56 1622 364640
M60 1887 424215
M64 2138 480642
M68 2441 548759
Tab. 10
1)
F
M
for hydraulic bolt-tensioning cylinder pretensioned to 85% of
yield strength
Bolt tension forces when using a hydraulic bolt-tensioning
cylinder for inch thread in accordance with ANSI B1.1:
Mounting pretension force
F
M
1)
Strength class 10.9
in
Mounting bolt
dimensions
kN lbs
1 – 8 UNC 301 67668
1 1/8 – 7 UNC 379 85203
1 1/4 – 7 UNC 481 108133
1 3/8 – 6 UNC 573 128816
1 1/2 – 6 UNC 697 156692
1 5/8 – 6 UNC 832 187041
1 3/4 – 5 UNC 942 211770