Screw Joints; Unbrako Screws; Gleitmo Treated Screws; Screws Lubricated In Other Ways - ABB IRB 14000 Product Manual

7.5 Screw joints

General
This section describes how to tighten the various types of screw joints on the IRB
14000.
The instructions and torque values are valid for screw joints comprised of metallic
materials and do not apply to soft or brittle materials.

UNBRAKO screws

UNBRAKO is a special type of screw recommended by ABB for certain screw joints.
It features 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 replacement screw is allowed. Using other types of screws will void any
warranty and may potentially cause serious damage or injury.

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.

Screws lubricated in other ways

Screws lubricated with Molycote 1000 should only be used when specified in the
repair, maintenance or installation procedure descriptions.
In such cases, proceed as follows:
Lubricant
Molycote 1000 (molybdenum disulphide grease)
Product manual - IRB 14000
3HAC052983-001 Revision: D
1 Apply lubricant to the screw thread.
2 Apply lubricant between the plain washer and screw head.
3 Tighten to the torque as described in the procedures.
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7 Reference information
7.5 Screw joints
Article number
11712016-618
447