Repair of motor bearing

timer Asked: Nov 21st, 2013

Question description

When the motor repair, all want to check whether the bearing wear, if the stator, rotor lighting strike is bearing damage, must be replaced.

As the motor size is different, the clearance between rotor and stator is between 0.015 ~ 0.030 inches long. The clearance around the rotor should be the same. The rattle of if there is heavy in starting, but there is no touch attack to the pole, while the rotor is often also shows that the bearing has serious wear and tear.

Bearings are usually made from phosphor bronze, and in the end or the end cover. Sometimes bearing with a pin to lock, pin bearing pushed through the bearing cap. From you if you want to pull down the bearing, we must face.

Note: when you remove the bearing, the direction of the force the end cover not partial, otherwise may damage the end cover.

When the new bearing pressure into the end cover, need to use reamer bearing. It is best to use an adjustable reamer, make the centre axis of two bearings.

Shaft and the bearing contact surface must be smooth, cut the axis on the lathe to using stone fixed on the tool bar.

If the bearing temperature, may have the following several reasons:

1, the oil is too thick.

2, the oil is too thin, should choose less affected by the temperature change and not easy to blister quality mineral lubricants.

3, oil contains impurities and grit.

4, belt too loose or too tight,

5, pulley wheel and the bearing friction.

6, motor installed improperly, will make the armature shaft shoulder pull or push a bearing.

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