How to check the appearance of bearing

In the use of cross bearing, we first check the appearance of imported bearings, to determine whether it conforms to the standard we require. Here to share with everyone one that we should check that those parts. Bearings should be checked for astigmatism lamp, the appearance of the bearings, cracks and other parts of careful observation.

1, various mechanical injuries, such as rubs, scratches, bruised, bumps, etc., can cause adverse bearing installation, causing partial load and stress concentration, resulting in a decline in rotation accuracy and service life.

2, rust, black and pits, the latter two are easy to store moisture and dirt defects, the most likely to develop into rust. The corrosion is the cause poor installation, the sources of early wear and fatigue, severe corrosion cause bearing scrap.

3, various cracks, such as raw materials, crack, crack forging, heat treatment and grinding cracks, cracks, these cracks in the future during the operation of the bearing, will be a source of stress concentration and rapid expansion, resulting in rupture of the bearing of the bearing life and safety at work of great impact. In fact, for the important purpose bearings, bearing factory has 100% of its constituent parts or ray magnetic particle inspection.

4, peeling and folding, these two defective part and base metal binding is not strong, and its surroundings often exist to varying degrees, or depleted carbon decarburization phenomenon, materials easy caving, debossing or wear of the bearing life and accuracy are negative.

5, riveted or welded cage quality rivet head is mainly observed deviation, skew, relaxation, lack of meat or 'eyelid', the correct position of the welding, solder joint is too large or too small, whether strong or welding welding caused by excessive stuck rolling phenomenon more than a few that we focus on checking SKF bearings in part inspection, in addition to other than the part of the inspection, in addition to poor quality such as typing, such as illegible, damaged, shall be considered as defective, In severe cases, can not be accepted.