Bomag BPR 25/32 - Tightening Torques for Screws with Metric Unified Thread; Tightening Bolted Connections

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%20$* 45BPR 25/32 - BPR 25/40
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4.21 Tightening torques for
screws with metric unified
thread
Fig. 54
* Strength classes for screws with untreated, non-
lubricated surface. Screw quality designations are
stamped on the screw heads.
8.8 = 8 G
10.9 = 10 K
12.9 = 12 K
The values result in a 90% utilization of the screw’s
yield point at a coefficient of friction µ total = 0,14.
Compliance with the tightening torque is checked
with torque wrenches.
L
Note
Self-locking nuts must always be replaced once
they have been unscrewed.
4.22 Tightening bolted connec-
tions
● Check all screws for tight fit, tighten if neces-
sary.
● Check the machine for damage and leaks, if
necessary have faults corrected.
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