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2.4.3 Screw joints
General
This section details how to tighten the various types of screw joints on the robot
and the FlexTrack.
The instructions and torque values are valid for screw joints comprised of metallic
materials and do not apply to soft or brittle materials.
Screw class
Class 12.9 screw is recommended by ABB for certain screw joints. These screws
are high grade quality and extremely resistant to fatigue. Whenever used, this is
specified in the instructions, and in such cases, no other type of replacement screw
is allowed! Using other types of screws will void any warranty and may potentially
cause serious damage or injury!
Loctite 243
A thread lock should be used on all screws that have a specified torque and only
where stated. This is required to prevent the risk of the screw loosening due to
vibrations over the lifetime of the product. Loctite 243 is the recommended thread
lock and should be applied to the screws before assembly and tightening to their
recommend torque.
Tightening torque
Before tightening any screw, note the following:
Use the correct tightening technique, i.e. do not jerk. Tighten the screw in a slow,
flowing motion.
The table below specifies the recommended standard tightening torque for class
12.9 screws.
Dimension
M6
M8
M10
M12
Product manual - FlexTrack IRT501-66/66R/90/90R
3HAW050008590-001 Revision: C
•
Determine whether a standard tightening torque or special torque is to be
applied. The standard torques is specified in the tables below. Any special
torques is specified in the
Installation procedure description. Any special torque specified overrides
the standard value.
•
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.
•
Maximum allowed total deviation from the specified value is 10%!
© Copyright 20042018 ABB. All rights reserved.
2 Installation and commissioning
Repair on page
143,
Maintenance on page 119
Tightening torque (Nm) Class 12.9
16.4
40
79
136
2.4.3 Screw joints
or
63
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