When using SKF bearings, we must first check the appearance of the imported bearings to judge whether they meet the standards we require. Let's share with you which parts we should check. The inspection of SKF bearings should be carried out under the astigmatism light, and the appearance, cracks and other parts of the bearings should be carefully observed. 1. Various mechanical scars, such as abrasion, scratches, crushing, bumps, etc., will cause poor bearing installation, cause unbalanced load and stress concentration, resulting in a decrease in rotation accuracy and service life. 2. Rust, black skin and pitting, the latter two are defects that are easy to store moisture and dirt, and are most likely to develop into rust. Corrosion is a source of pollution leading to poor installation, early wear and fatigue, and severe corrosion can render bearings useless.

3. Various cracks, such as raw material cracks, forging cracks, heat treatment cracks and grinding cracks, etc., these cracks will become a source of stress concentration and expand rapidly during the operation of the bearing in the future, causing the bearing to break, which is harmful to the bearing life and work safety. Sex has a huge impact. In fact, for bearings with important uses, the bearing factory has carried out 100% magnetic or radiographic inspection of its component parts. 4. Peeling and folding, the parts of these two defects are not firmly combined with the base metal, and there are often decarburization or carbon-poor phenomena around them to varying degrees, and the material is easy to collapse, dent or wear, which has a great impact on the bearing life and accuracy. unfavorable. 5. The riveting or welding quality of the cage is mainly to observe whether the rivet head is misaligned, skewed, loose, lack of meat or "double eyelid", whether the welding position is correct, whether the solder joint is too large or too small, whether the welding is not strong or not. Excessive welding causes jamming of rolling elements.