Youte Bearing is the standard-setting unit of precision angular contact bearing in China. The company has been engaged in the research and development of high precision, high speed, high stiffness, high reliability, high performance and long life bearings for a long time. It adopts precision detection and matching technology to achieve precise matching of bearings, which fully reflects the advantages of angular contact bearings. The unique protrusion measuring instrument is used, and the detection accuracy is up to 0.1 μm. The preload is selected according to the actual application, and the load measurement error is controlled within 1 N.