Screw Joints - ABB IRB 360/3 Product Manual

4 Repair

4.2.3. Screw joints

4.2.3. Screw joints
General
This section details how to tighten the various types of screw joints on the robot.
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:
The table below specifies the recommended standard tightening torque for oil-lubricated
screws with Allen head screws.
Dimension
M5
M6
M8
M10
M12
M16
M24
114
• Determine whether a standard tightening torque or special torque is to be applied.
The standard torques are specified in the tables below. 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 pneumatical 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%!
Tightening torque
(Nm)
Class 8.8, oil-lubri-
cated
6
10
24
47
82
200
725
Tightening torque Tightening torque
(Nm) (Nm)
Class 10.9, oil-lubri- Class 12.9, oil-lubri-
cated cated
- -
- -
34 40
67 80
115 140
290 340
960 1150
3HAC030005-001 Revision: -
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