Table of Contents
Advertisement
NOTE: It is essential that the information provided on the bearing plate is taken
7.5.5 Bearing grease
It is essential to use grease of good quality and with the correct base soap. This
will ensure a long and trouble free lifetime of the bearings. Grease used for re-
greasing should have the following properties:
•
Be special rolling bearing grease.
•
Be of good quality with a lithium complex soap, and with mineral-, or PAO-
oil.
•
Have a base oil viscosity of 100 to 160 cSt at 40 °C (105 °F).
•
Have a consistency NLGI grade of 2 (as a recommendation).
•
Have a continuous temperature range between -30 °C (-20 °F) and at least
+120 °C (250 °F).
Grease with the correct properties is available from all major lubricant
manufacturers. If the make of grease is changed and compatibility is uncertain,
consult the manufacturing ABB factory, see Chapter 9.1.5. After Sales contact
information.
NOTE: Grease additives are recommended. However, a written guarantee
NOTE: Lubricants containing EP admixtures are not recommended.
NOTE: Different makes of grease must not be mixed, unless the compatibility
Recommended rolling bearing grease
ABB recommends any of the following high performance greases to be used:
•
Esso Unirex N2 (lithium complex base).
•
Klüber Klüberplex BEM 41-132.
Re-greasing intervals for greases fulfilling the required properties other than the
ones mentioned above should be halved.
Rolling bearing grease for extreme temperatures
If the bearing operating temperature is above 100 °C (210 °F), please consult the
manufacturing ABB factory for suitable greases.
7.5.6 Fitting and replacing the closed DE-bearing
Bearing removal
1. Support the shaft.
2. Remove the 8 screws of the NDE shield on the stator.
3. Tap off the DE shield.
4. Remove bearing retainers.
5. Extract the ball bearing with a puller (see Figure 7-1. The bearing puller).
into account when using and maintaining the machine.
should be obtained from the lubricant manufacturer stating that the
additives do not damage the bearings or the properties of the grease in
the field of the operating temperature. This is especially important for
EP additives.
has been verified.
Page 50
Advertisement
Table of Contents
