motor bearing

Since the advent of bearings, bearings can be seen in all places of mechanical transmission. Bearings have been more widely entered into People's Daily work and life, how to better distinguish the advantages and disadvantages of bearings through the appearance of bearings has become very important. The focus of attention in the appearance inspection are the following:

1. All kinds of 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 running of bearings in the future, resulting in bearing breakage, which has a great impact on bearing life and work safety.

2. All kinds of mechanical scars, such as abrasion, scratch, crush, bump, etc., will cause poor bearing installation, cause partial load and stress concentration, resulting in a decline in rotation accuracy and service life.

3. Rust, black skin and pitting, the latter two are easy to store water and dirt defects, the most easy to develop into rust. Corrosion is a source of pollution that leads to poor installation, early wear and fatigue, and serious corrosion will make bearings scrapped.

4. Peeling and folding, the local combination of these two defects with the base metal is not strong, and there is often a decarbonization or carbon-poor phenomenon around it to varying degrees, and the material is easy to collapse, concave or wear, which is very unfavorable to the bearing life and accuracy.

5. The riveting or welding quality of the cage mainly observes whether the rivet head is offset, skew, slack, whether the welding position is correct, whether the solder joint is too large or too small, whether the welding is not strong or excessive welding causes the phenomenon of stuck rolling body.