procedure descriptions. Any special torque specified overrides the standard
torque!
• Use the correct tightening torque for each type of screw joint.
• Only use correctly calibrated torque keys.
• Always tighten the joint by hand, and never use pneumatic tools.
• Use the correct tightening technique, that is do not jerk. Tighten the screw
in a slow, flowing motion.
• Maximum allowed total deviation from the specified value is 10%!
Oil-lubricated screws with slotted or cross-recess head screws
The following table specifies the recommended standard tightening torque for
oil-lubricated screws with slotted or cross-recess head screws.
Note
A special torque specified in the repair, maintenance or installation procedure
overrides the standard torque.
Oil-lubricated screws with allen head screws
The following table specifies the recommended standard tightening torque for
oil-lubricated screws with allen head screws.
Note
A special torque specified in the repair, maintenance or installation procedure
overrides the standard torque.
Tightening torque (Nm)
Class 12.9, oil-lubric-
ated
Tightening torque (Nm)
Class 10.9, oil-lubric-
ated
Tightening torque (Nm)
Class 8.8, oil-lubricated
Dimension
--6M5
--10M6
403424M8
806747M10
14011582M12
340290200M16
670560400M20
1150960680M24
Continues on next page
Product manual - IRB 6790 649
3HAC063331-001 Revision: B
© Copyright 2019 - 2020 ABB. All rights reserved.
7 Reference information
7.4 Screw joints
Continued
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