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> Bearing Dr > Handling of bearings
rolling beating is the part of precision machine a cautious
handling is a must. Even a highly efficient equipment it would
not function properly if it not handled as instructed. The followings
shall be observed in handling the bearings.
(1) Bearing and the surroundings shall be maintained clean (no
(2) Bearings shall be handled cautiously (no impact)
(3) Proper tools shall be used (no tools for other purpose)
(4) Bearings shall be protected from corrosion (wearing gloves
when handling bearing and bearing shall kept away from corrosive
A life-span and performance of beating are affected by proper installation of bearing, and thus the following standards shall be considered in assembling process.
(1) Cleaning the bearing and accessories
(2) Checking the dimension and finish
(3) Assembly method
(4) Checking after assembling
Considering the axial rotation of bearings, inner side shall
be tightened, while outer side loosened when assembling.
test shall be conducted after assembling. Chart 2 summarizes
the test process. When abnormal function is detected, the operation
shall be stopped for inspection. Please refer to Chart 2 for
cause and countermeasures.
Chart 1 Operation test process
If the test is acceptable, operation starts
of lubricant level, bearing and lubricant replacement,
(1) Refueling interval of grease
Grease tends to be performing poorly due to deterioration as
times go by, requiring replacing the lubricant at appropriate
interval, which depends on type, dimension and rotation speed
of bearing. Fig 4.2 indicates the grease refueling interval
depending on operation hours. That is, when bearing temperature
exceeds 70℃, the interval of refueling shall be reduced half
whenever the bearing temperature rises every 15℃.
(2) Replacement interval of lubricant
Replacement interval of lubricant varies depending on the condition
and level lubricant. It needs to be replaced once a year when
the operation temperature is below 50℃ at the environment with
less foreign material, and the oil temperature is around 100℃,
it needs to be replaced at every 3 months or earlier.