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Answer Posted / srinivasa rao talasila
The possible causes of motor vibration are...
1) Improper fixing of the base boalts
2) Loose tighting of the bearing seating areas
3) Bearing problem
4) loose coupling between load and motor
5) rotor dynamic balancing problem
6) Cooling fan balancing problem
7) Bearing is skidding inside either inner race or outer
race in end cover.
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