Common mistakes in bearing installation

The inner ring of the bearing is loosely coupled with the inner hole of the bearing.

The outer diameter of the bearing is generally tightly fitted between the shaft and the inner diameter of the bearing. For a long time, when there is a gap between the shaft and the bearing, the inner diameter is taken, so that the bearing shaft and the inner hole surface slide. Sliding friction will cause the bearing to generate heat, which will cause the bearing to heat and necrosis.

The inner ring end face inside the bearing rubs against the bearing shoulder and generates crack
Sliding traces between the shaft of the bearing and the surface of the hole inside the bearing

When the inner ring of the inner ring bearing of the bearing is frictionally slipped with the shaft of the bearing, it will heat up to a high temperature because the inner ring end face of the bearing and the bearing shoulder surface are very small, but the temperature is also very high. This will cause thermal cracks in the inner ring end face of the bearing, and the continuous extension of the hot crack will cause the bearing to break.
Adhesion between the shaft of the bearing and the inner surface of the bearing

When the inner ring of the bearing is taken, the inner ring of the bearing is frictionally slipped with the shaft of the bearing, and the high temperature caused by the heat causes the surface metal to melt and cause adhesion.