Omission of a Step in the Production Process Leads to Significant Reduction in the Lifespan of High-Speed Precision Angular Contact Ball Bearings!

A few days ago, a colleague from a manufacturing plant brought in two sets of roller tracks, all of which were scratched on high-speed precision angular contact ball bearings, and asked me to investigate the cause.

Upon receiving the angular contact ball bearings, I noticed that besides some scratches on the raceways, there were also numerous tiny metal particles adhering to the surface.

Subsequently, I tested the magnetism of the precision bearings and found it to be severely excessive.

During the machining process of angular contact ball bearings, there are many opportunities for magnetic contact. For example, the magnetism of the grinding machine's chuck and the demagnetization process may occur more than once during production. If demagnetization is not carried out properly, not only will it fail to eliminate magnetism, but it may also increase it, making it easy to attract metal particles (such as grinding debris). Such products are difficult to clean effectively through normal washing processes, ultimately resulting in early failure of precision bearings during use.

We not only have standardized demagnetization processes, but also periodically calibrate our demagnetization equipment. Additionally, professional gauges are used to test residual magnetism in each batch, ensuring that it remains within acceptable limits.

Therefore, it can be said that the devil is in the details!