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Under normal load and environmental conditions the quality of the grease ensures
proper operation of the motor for about 20000 service hours with 2-pole design and
40000 service hours with multi pole design. If not otherwise agreed upon the grease
need not be refilled during this period. Nevertheless the condition of the grease
filling should be occasionally checked also within the said lubricating intervals.
The stated service hours are only current under operation with rated speed. For
relubrication thoroughly clean the bearings with a suitable solvent and use the same
or substitute grades specified by the motor manufacturer. Bear in mind, however,
that the bearings should be filled only up to about 2/3 of their free space as a
complete filling of the bearings and bearing covers results in an increased bearing
temperature and therefore in increased wear. For bearings with relubricating facility
regrease at the grease fitting with the motor running according to the grease amount
required for the motor in case. The relubrication intervals should be looked up in the
following table:
A chemically aggressive environment, extreme moistness, strong vibrations, high or
low ambient temperatures are not normal circumstances and such conditions must
be taken into account.
Frame size
Motors with 2 poles
Motors with 4 and multi-poles
from 280 up to and incl. 400
2.000 hours
4.000 hours
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Disposal
The applicable national regulations are to be observed with regard to disposal of the
machines.
It is furthermore to be ensured that oils and greases are collected for disposal in
accordance with the corresponding regulations on waste oils. They must not be
contaminated with solvents, cold cleaners and paint residues. The individual
materials should be segregated for recycling. The most important components are
grey cast iron (housing), steel (shaft, stator and rotor lamination, small parts),
aluminium (rotor), copper (windings) and plastics (insulation materials, such as
polyamide, polypropylene, etc.). electronic components such as circuit boards
(converter, sensors, etc.) are recycled separately.
