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If the bearing temperature rises and motor operation appears to be normal, operation
should continue until the bearing temperatures stabilize. Recommended limits on bearing
temperature rises over ambient temperature are as follows:
Note: When operating flood-lubricated sleeve bearings, the bearing temperature must not be
allowed to exceed 185 F (85 C) total temperature.
Sleeve Bearings Temperature Rise Over Ambient Temperature
By permanently installed detector
72° F (40° C)
By temporary detector on top of the
bearing sleeve near the oil ring
63° F (35° C)
CAUTION
CAUTION
!
Under normal conditions, for the self-lube bearing, the rate of temperature rise
should be from 20° to 25° F (11° to 14° C) for the first 10 minutes after starting up
and approximately 40° F (22° C) at 30 minutes. The rate of bearing temperature
rise is a function of the natural ventilation and operating conditions.