What are the possible problems with the appearance of the bearing? (1)

When using the bearing, we must first check the appearance of the bearing to infer whether it meets the criteria we require. The bearing inspection should be carried out under astigmatism light, carefully observe the bearing surface, cracks and other parts.
1. Various cracks
Such as raw material cracks, forging cracks, heat treatment cracks and grinding cracks, these cracks will become the source of stress concentration and rapidly magnify during the operation of the bearing in the future, resulting in bearing splits, which have a great impact on bearing life and working safety. In fact, the bearing factory has carried out 100% magnetic or radiographic inspection of its components for important-purpose bearings.
2. Various mechanical scars
Such as abrasion, scratches, crushing, bruising, etc., all will result in poor installation of the bearing, resulting in unbalanced load and stress collection, resulting in a drop in rotation accuracy and service life.
Rust, black skin and pitting
The latter two are the shortcomings of simple storage of moisture and dirt, which are relatively easy to develop into rust. Corrosion is a source of pollution that causes poor installation, early wear and fatigue. Crucial corrosion will cause the bearing to be scrapped.