Why is there an indentation on the bearing?

Bearing a gentle pressure is easy to have abnormal sound, indicating that the bearing inside the scar, so, how is the bearing inside the scar produced?

Hardness is a measure of a material's ability to resist local deformation, especially plastic deformation, indentation or scratch. Generally, the harder the material, the better its wear resistance, such as gear and other mechanical parts will require a certain hardness to ensure sufficient wear resistance and service life.

When the bearing is installed normally, if the inner ring is the mating surface, then the inner ring will be pressed, and the outer ring will not be stressed, and there will be no scars. However, if the inner and outer rings are stressed relative to each other, it will produce Brinell indentation.

If the inner and outer rings of the bearing are relatively stressed, only a slight pressure is required, and the bearing is easy to produce damage indentation (professional name is Brinell indentation) on the surface of the steel ball and the raceway surface, and then produce abnormal sounds. Therefore, any installation position that may make the bearing inner and outer rings relatively stressed may cause damage to the bearing interior.

At present, about 60% of bearing anomalies are caused by bearing damage caused by improper installation. Therefore, instead of trying to find the trouble of bearing manufacturers, it is better to use the technical strength of bearing manufacturers to test their installation posture, whether there are risks and hidden dangers.