Motor Bearing Mounting Method

When repairing an electric motor, the bearings are sometimes removed to clean and installed. But the installation also has a certain skill, otherwise it is not good, the specific installation method is as follows.

Before installing the bearing, place the bearing cover on the shaft first. When installing a bearing, place one side of the bearing with a number (mark) facing outwards for viewing. There are two common ways to install bearings.

1. Mounting with a sleeve

With the sleeve to install the bearing, metal sleeve Jane (copper best) against the bearing, the other end of the sleeve on the iron plate, for hammering, you can install the bearing. The two ends of the set should be leveled so that the bearing inner ring is evenly subjected to the bearing and the bearing will not be damaged.

2. Heating method

Place the oil-filled iron bucket on the stove to heat, the bearing seamount in the oil to cook, and so the oil temperature rises to about 100 degrees C, remove the bearing, while the heat on the shaft. When cooking bearings, you should not place the bearings on the bottom of the barrel to avoid local annealing of the bearings.

After installing the bearings, turn them by hand to see if they are flexible, flexible rotation, that is, the installation meets the requirements.

The method of removing the rolling bearings is similar to the removal of the pulley and can also be done with a puller. If there is no puller, you can use two iron flat slings to clamp the shaft, so that the rotor suspended, and then after contact with the ball bearing or copper block on the upper end of the shaft, with a hammer knock to remove the bearing, in the operation process to pay attention to safety. When assembly, you can find a flat-mouthed iron tube with an inner diameter slightly larger than the outer diameter of the shaft into the shaft, so that the pipe wall is right on the inner ring of the bearing, you can hit the tube mat wood block with a hammer, so that the bearing is sleeveinto into the rotor positioning. Note that the bearing deep groove ball bearing inner circle and the shaft can not be too tight, if too tight, can be used with fine sand cloth around the shaft surface, evenly polished, so that the bearing can be integrated after the general tightness can be. Also, the bearing ring and the end cover should not be too tight.