The role of the wheels is essential for the car to run. The quality of the bearings in the wheels will directly affect the running effect of the tires. If it is a deep groove ball bearing, how can it be judged from its appearance?
(1) Various cracks, such as raw material cracks, forging cracks, heat treatment cracks, grinding cracks, etc., these cracks will become the source of stress concentration and expand rapidly during the operation of the bearing in the future, causing the bearing to rupture, affecting the bearing life and work. The security impact is huge.
(2) Various mechanical scars, such as abrasions, scratches, crushes, bumps, etc., will cause poor bearing installation, cause eccentric load and stress concentration, and cause the rotation accuracy and service life to decline.
(3) Rust, black skin, and pitting, the latter two are defects that easily store moisture and dirt, and are likely to develop into rust. Corrosion is a source of contamination that leads to poor installation, early wear, and fatigue, and severe corrosion can make bearings scrapped.
(4) Peeling and folding, these two defects are partially combined with the base metal, and there are often decarburized or decarbonized phenomena around them to varying degrees. Very unfavorable.
(5) For the riveting or welding quality of the cage, mainly observe whether the rivet head deviates, skewed, slack, lack flesh or "double eyelid", whether the welding position is correct, whether the welding point is too large or too small, and whether the welding is not strong or welding.
It is hoped that from the aspects that need to be paid attention to in the visual inspection in this article, bearing steel has very strict chemical composition requirements, so the chemical properties of bearing steel bearings are very stable, and there will not be much difference in mass production. If you need it, you can call us directly, we are very professional roller bearings manufacturers.
