ABB IRB 6600 - 175/2.55 User Manual page 221

2.1.2 Screw joints
General
This section details how to tighten the various types of screw joints on the manipulator as well
as the controller.
The instructions and torque values are valid for screw joints comprising metallic materials
and do not apply to soft or brittle materials.
Any instructions given in the repair, maintenance or installation procedure description over-
ride any value or procedure given here, i.e. these instruction are only valid for standard type
screw joints.
UNBRAKO UNBRAKO is a special type of screw recommended by ABB in certain screw joints. It fea-
screws
tures special surface treatment (Gleitmo as described below), and is extremely resistant to
fatigue.
Whenever used, this is specified in the instructions and in such cases no other type of replace-
ment screw is allowed. Using other types of screw will void any warranty and may potentially
cause serious damage or injury!
Gleitmo treated
Gleitmo is a special surface treatment to reduce the friction when tightening the screw joint.
screws
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.
Screws lubricated
Screws lubricated with Molycote 1000 (or another lubricant) should only be used when spec-
in other ways
ified in the repair, maintenance or installation procedure descriptions.
In such cases, proceed as follows:
Lubricant
Molycote 1000 (molybdenum disulphide grease)
3HAC 16245-1
1. Lubricate the thread of the screw.
2. Lubricate between the plain washer and screw head.
3. Tighten to the torque specified in section "Tightening torque" below. Screw dimensions
of M8 or larger must be tightened with a torque wrench. Screw dimensions of M6 or
smaller may be tightened without a torque wrench if this is done by trained and quali-
fied personnel.
A
2 Reference information
2.1.2 Screw joints
Art. no.
1171 2016-618
19