4.2.3 Screw joints
General
This section describes how to tighten the various types of screw joints on ABB
robots.
The instructions and torque values are valid for screw joints comprised of metallic
materials and do
not
apply to soft or brittle materials.
Gleitmo treated screws
Gleitmo is a special surface treatment to reduce the friction when tightening the
screw joint. Screws treated with Gleitmo may be reused 3-4 times before the coating
disappears. After this the screw must be discarded and replaced with a new one.
When handling screws treated with Gleitmo, protective gloves of
nitrile rubber
type should be used.
Tightening torque
Before tightening any screw, note the following:
•
Determine whether a
standard
tightening torque or
special
torque is to be
applied. The
standard torques
are specified in the following tables. Any
special torques
are specified in the repair, maintenance or installation
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
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.
Continues on next page
Product manual - IRB 360
155
3HAC030005-001 Revision: Z
© Copyright 2008-2021 ABB. All rights reserved.
4 Repair
4.2.3 Screw joints
Summary of Contents for IRB 360
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