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Email: yw@gifudayo.com
Address: 2758 Songjin Road, Zhangyan Town, Jinshan District, Shanghai, China

Shaanxi Yuwei Bearing Manufacturing Co., Ltd
Tel: 029-86696506
Fax: 029-89503160
Enterprise QQ:  Click here to send me a message Pre sale  Click here to send me a message After sale
Email: sales@gifudayo.com
Website: www.ywbearings.com
Address: Qinhan new town free trade zone, Xixian new area, Shaanxi Province

Bearing appearance inspection of small and micro bearings

Release time: 2020-09-17 15:23:13 Views: 144

Where there is rotation, there is YW bearings!


Since the advent of bearings, where the mechanical transmission can be seen in the shadow of the bearing. Bearing has been more widely into people's daily work and life, how to better distinguish the advantages and disadvantages of bearings through the bearing appearance has become particularly important. In this issue, we will introduce how to inspect the bearing quality according to the bearing appearance.


The appearance of bearing can be inspected under the flash lamp. Since most of the inspection items are related to the accuracy, performance and service life of the bearing, the inspection should be careful and the appearance defects of the bearing should not be ignored.



The key points in appearance inspection are as follows:


1. All kinds of cracks, such as raw material cracks, forging cracks, heat treatment cracks and grinding cracks, will become the source of stress concentration and expand rapidly in the later bearing operation process, resulting in bearing fracture, which has a great impact on bearing life and work safety. As a matter of fact, bearing factories have carried out 100% magnetic or radiographic inspection on the components of bearings for important purposes.


2. All kinds of mechanical scars, such as abrasion, scratch, crush, bruise, etc., will lead to poor installation of bearings, resulting in unbalanced load and stress concentration, resulting in the decline of rotating accuracy and service life.


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



4. Peeling and folding, the local part of these two defects is not firmly combined with the base metal, and there are decarburization or poor carbon phenomenon around them to varying degrees. The material is easy to collapse, dent or wear, which is very unfavorable to the bearing life and accuracy.


5. The riveting or welding quality of cages is mainly to observe whether the rivet head is deviated, skewed, loose, lack of flesh or "double eyelid", whether the welding position is correct, whether the welding spot is too large or too small, whether the rolling element is stuck due to poor welding or excessive welding, whether the quality of slope pressing, edge closing, caulking and chiseling of some cages is guaranteed, and whether the rolling element can not fall out and keep If these key points do not meet the requirements, small bearing noise and rotation accuracy will be reduced, and large cage may be scattered, resulting in mechanical failure or accident.


If any of the above items are found in the inspection, the bearing quality will be defective, which should be used with caution or further inspection. In addition, if the typing quality is poor, such as illegible handwriting, damage, should be judged as defective, serious cases can not be accepted. Moreover, the bearing assembly surface must not have visible burns (annealing traces).

The above is the correct cleaning method of motor bearings introduced by the small and micro enterprises in this issue. I hope it will be helpful to you. If you want to know more about bearings, Please call Yuwei's sales hotline 021-51099639-802 and 24-hour after-sales service hotline 15309279285 (wechat's same number), we will provide you with help and technical service support at any time!

Yuwei bearing, the bearing expert around you.

 Shanghai miniature bearing
Shanghai Yuwei Bearing Co., Ltd. (Headquarters)
Tel: 021-51099639
Fax: 021-51861291
Email address: yw@gifudayo.com
Address: 2758 Songjin Road, Zhangyan Town, Jinshan District, Shanghai, China
Shaanxi Yuwei Bearing Manufacturing Co., Ltd
Tel: 029-86696506
Fax: 029-89503160
Email address: sales@gifudayo.com
Address: Qinhan new town free trade zone, Xixian new area, Shaanxi Province
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