Bearing Grease - ABB AMA Series Manual

Manual for Induction Motors and Generators

7.5.3.5 Bearing grease

74 - Maintenance
Automatic re-greasing
A variety of automatic re-lubrication systems is available on the market. However, ABB
recommends only the use of electromechanical re-lubrication systems. The quality of the grease
entering the bearing has to be checked at least once per year: the grease has to look and feel like
new grease. Any separation of the base oil from the soap is not acceptable.
NOTE: If an automatic re-greasing system is used, double the amount of grease indicated on
the bearing plate.
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 between 1.5 and 3. For vertically or in hot conditions
mounted machines, NLGI grade 2 or 3 is recommended
• 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: Different makes of grease must not be mixed, unless the compatibility has been
verified.
NOTE: Grease additives are recommended. However, a written guarantee 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.
NOTE: Lubricants containing EP admixtures are not recommended.
Recommended rolling bearing grease
ABB recommends any of the following high performance greases to be used:
• Esso Unirex N2, N3 (lithium complex base)
• Mobilith SHC 100 (lithium complex base)
• Shell Albida EMS 2 (lithium complex base)
• Klüber Klüberplex BEM 41-132
• Lubcon Turmogrease Li 802 EP
• Total Multiplex S 2 A
• Fag Arcanol Temp 110
3BFP 000 050 R0101 REV E