Slew Drives
Installation and commissioning
29
WARNI
WARNI
WARNI
WARNING
NG
NG
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