Precision Bearings factory is the professional grinding and assembly factory that mainly specialized in medium and small size deep groove ball bearings and mainly produces ball bearings short cylindrical bearings taper bearings and thrust roller bearings. Precision Bearings factory owns three workshops as quiet workshop precision workshop and assembly workshop. Precision Bearings factory also is the birthplace of B3-706 and B3-707 bearings which were awarded the only golden medal in bearing industry. The devices configuration is 60m/s high-speed grinding and adopts CNC A.C. servo constant power grinding control system to improve the control accuracy of the grinding machine. The grinding workshop owns 13pcs of production lines that included 7pcs of automation lines and 6pcs of pipelines. The medium and small size bearings for low-noise power machine and the P5 and P4 deep groove ball bearings are widely used in electric motors machine tool spindle and aircraft engine etc.