How to check the appearance of SKF bearings
When using SKF bearings, we must first check the appearance of the imported bearings to determine whether it meets the standards we require. Let's share with you the parts we should check.
Inspection of SKF bearings should be carried out under astigmatism, and the appearance, cracks and other parts of the bearing should be carefully observed.
1, a variety of mechanical scars, such as abrasions, scratches, crushes, bumps, etc., will cause poor bearing installation, causing eccentric load and stress concentration, resulting in decreased rotation accuracy and service life.
2, rust, black skin and pitting, the latter two are easy to store moisture and dirt defects, the most likely to develop into rust. Corrosion is a source of contamination that leads to poor installation, early wear and fatigue, and severe rust can cause bearings to be scrapped.
3, a variety of cracks, such as raw material cracks, forging cracks, heat treatment cracks and grinding cracks, etc., these cracks will become a stress concentration source and expand rapidly during the operation of the bearing, resulting in bearing cracking, bearing life and work safety Sexual influence is enormous. In fact, for bearings of important use, the bearing factory has performed 100% magnetic or radiographic inspection of its components.
4, peeling and folding, the two defects are not firmly bonded to the base metal, and there are often decarburization or carbon depletion around them. The material is easy to collapse, emboss or wear, which is very good for bearing life and precision. unfavorable.
5, the riveting or welding quality of the cage, mainly to observe whether the rivet head is biased, skewed, slack, lack of meat or "double eyelids", the welding position is correct, the welding point is too large or too small, whether the welding is not strong or Excessive welding causes the phenomenon of jamming of the rolling elements.
The above items are the key parts of our inspection of SKF bearings. In addition to the above-mentioned inspections, if the quality of typing is not good, such as illegible and damaged, it should be considered as defective, and serious cases may not be accepted.
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