Motor Case
Invalid Case
20200526 Application Case: A customer in the motor industry used a 6201 bearing from a certain imported brand in an oven motor. The end user reported abnormal noise and bearing disintegration, resulting in failure.
According to testing by our company’s technical personnel, all dimensional measurements are within specifications; only the noise level exceeds the standard. The detailed analysis is as follows:
1. The inner raceway exhibits numerous closely spaced elongated depressions, appearing dark gray; the running track shows varying widths, gradually narrowing toward one side.
2: The outer raceway exhibits numerous closely spaced, elongated depressions, appearing dark gray; the running track gradually narrows toward one side until it disappears.
3: The rolling element surfaces exhibit severe wear, have turned white, and show numerous pitting defects.
Draw a conclusion
The bearing failed due to erosion caused by electrical current leakage.
Reason:
a. The potential difference between the outer ring and the inner ring;
b. In devices capable of generating high-frequency signals, or on printed circuit boards;
c. High-frequency potential differences will be generated in the surrounding area.
Creating value for society through fast, professional, and high-quality service.
Chichuang·Hangzhou
Address: Floor 4, Unit 2, Building 10, No. 505 Xingguo Road, Linping District, Hangzhou City
Chichuang·Shenzhen
Address: Room 2405, Building 111, Phase I, Vanke City, Nanbu Bay, Humen Town, Dongguan City
Chichuang·Chongqing
Address: Building 4, No. 5 Huoju Avenue, Jiulongpo District, Chongqing City
Copyright © 2026 Hangzhou Chichuang Shaft Research Technology Co., Ltd.
Factory Address: Building 1, No. 10, Nangonghe Road, Donghu Subdistrict, Linping District, Hangzhou.
Powered by: