How to pass the appearance of imported NSK bearings for insp

2011-10-19 16:53    Author:admin   Click:

Bearing the import examination should be performed under astigmatism lamp, bearing on the appearance of cracks and other parts, careful observation.

1, from the skin and fold:

These two kinds of defects of the local and the metal substrate binding is not strong, and often around the different level land is existing carbon or carbon poor phenomenon, materials easily caving, concave pressure or wear, on bearing service life and accuracy is very bad.NSK bearing

2, the holder of the riveting or welding quality:

Primary observation of the rivet head is offset, skew, relaxation, lack of meat or eyelid, welding position is correct, solder joint too big or too small, there is no solid welding or welding rolling body phenomenon caused by excessive jam. The above several is that we in the inspection of imported bearings in the focus of the inspection part, in addition to the examination of the segment, such as the poor quality of another type, such as illegible, NSK bearing damaged, defective should think seriously, can also be no acceptance.

3, rust, black and ma:

The latter two are easy to store water and dirt of the defects, most likely to develop into rust. The cause of corrosion is the poor installation, early wear and fatigue of the sources of pollution, a serious end-of-life bearings will rust.

4 .NSK bearing , all kinds of machinery:

Such as scratch, scratch, crush, bruise, can cause bearing mounting bad, cause partial load and stress concentration, causing the rotary precision and the service life of the fall.

5, all kinds of cracks:

Such as raw materials, crack, crack of forging, heat treatment and grinding cracks, cracks, the cracks in the bearing after the operation process, will become the source of stress concentration and the rapid expansion, resulting in the breakdown of bearings, the bearing life and job security influence. In fact, the essential purpose of the bearings, bearing factory has been composed of parts of its 100% magnetic or radiographic inspection.