01A01-15
MF 400 Xtra
Introduction
01
E. General table of recommended
torques for bolts
Guide for use of the tables
Only use these tables when the torque is not
specified.
Use tables 1A and 2A for LOW torque:
- When there is risk of damage to the parts held
by the bolt.
- When there are thick or compressible joints
between the components.
- When the surfaces to be joined are not plane or
not parallel.
The illustration below shows why correct tightening
is essential, as it determines the tension in the bolt
(or stud), and thus the compression in the
components.
With non-plane, non-milled surfaces against the
head of the bolt or nut.
Use tables 1B and 2B for NORMAL Torque:
- When there is no risk of damage to the parts
held by the bolt.
- When it’s necessary a higher tightening torque
to ensure the bolt or nut is properly secured.
- When the thread is not lubricated before
assembly.
The gauge of nuts and bolts, in mm (ISO) or in
inches, is the diameter (D) in the drawing below,
and not the width (s) of the head.
Fig. 2
Fig. 1
S
STEP “P”
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