The NSK bearings appearance quality inspection should astigmatism lamp, the appearance of angular contact ball bearings, cracks and other parts of careful observation.
1, peeling and folding:
Local defects and base metal combined with unsound, and its surrounding often exist to varying degrees of decarburization or depleted carbon phenomenon, the materials are easy to caving, indentation or wear on the NSK bearing life and accuracy.
2, the cage of the caulking or welding quality:
MAIN OUTCOME rivet head deviation, skew, relaxation, lack of meat or double eyelids correct position welding solder is too large or too small, whether welding is not strong or welding caused by excessive stuck phenomenon of rolling elements. Above items we focus on checking check angular contact ball bearings in part, in addition to the part of the above checks, the other poor quality such as typing, such as illegible, damaged, defective should be considered more seriously, no acceptance.
3, rust, black and pitting:
The latter two are easy to store moisture and dirt defects, most likely to develop into rust. While corrosion leading to poor installation, the source of contamination of early wear and fatigue, severe corrosion will make NSK Bearings scrapped.
4, various mechanical wounds:
Such as galling, scratched, bruised, bruised, the NSK bearings can cause poor installation, causing partial load and stress concentration, resulting in a decline in rotation accuracy and service life.
5, various cracks:
Such as raw materials, cracks, forging cracks, heat treatment cracking and grinding cracks, etc., these cracks after angular contact ball bearings during operation, will become a source of stress concentration and rapidly expanding, resulting in the breakdown of the NSK bearings, angular contact ball bearing life and work great security. In fact, for the important purpose of NSK Bearings Bearing Factory has its component parts and 100% magnetic ray detection checks.


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