ABB IRB 6600 - 175/2.8 type B, Product Manual

Page: 227 / 533

4 Repair
4.2.2. Mounting instructions for bearings
225 3HAC023082-001 Revision: E
©
Co
py
rig
h
t 200
4-
200
8 ABB. All righ
ts reser
v
ed.
4.2.2. Mounting instructions for bearings
General
This section details how to mount and grease different types of bearings on the robot.
Equipment
Assembly of all bearings
Follow the instructions below when mounting a bearing on the robot.
1. To avoid contamination, let a new bearing remain in its wrapping until it is time for fitting.
2. Ensure that all parts included in the bearing fitting are free from burrs, grinding waste and
other contamination. Cast components must be free from foundry sand.
3. Bearing rings, inner rings and roller elements must under no circumstances be subjected
to direct impact. Furthermore, the roller elements must not be exposed to any stresses
during the assembly work.
Assembly of tapered bearings
Follow the previous instructions for assembly of all bearings, when mounting a tapered
bearing on the robot.
In addition to those instructions, the procedure below must be carried out to enable the roller
elements to adjust to the correct position against the race flange.
1. Tension the bearing gradually until the recommended pre-tension is achieved.
Note! The roller elements must be rotated a specified number of turns before pre-
tensioning is carried out and also rotated during the pre-tensioning sequence.
2. Make sure the bearing is properly aligned, as this will directly affect the lifespan of the
bearing.
Greasing of bearings
The bearings must be greased after assembly, according to instructions below:
•
The bearings must not be completely filled with grease. However, if space is available
beside the bearing fitting, the bearing may be totally filled with grease when mounted,
as excessive grease will be pressed out from the bearing when the robot is started.
• During operation, the bearing should be filled to 70-80% of the available volume.
•
Ensure that grease is handled and stored properly, to avoid contamination.
Grease the different types of bearings as detailed below:
•
Grooved ball bearings must be filled with grease from both sides.
• Tapered roller bearings and axial needle bearings must be greased in the split
condition.
Equipment, etc. Art. no. Note
Grease 3HAB 3537-1 Used to grease the bearings, if not
specified otherwise.