Angular contact ball bearing 71921 C P4A GA (in addition to DB, DT, TBT, QBC and other matching methods) is mainly used on high-speed motor spindles. The operating speed reaches 55000 to 6500 rpm. Imported materials, imported G5 grade steel balls, and Kluberspeed NBU15 grease are used, which have the advantages of high rigidity, high precision, high speed, etc.

Wuxi Taixinglai Precision Bearing Co., Ltd. is a private enterprise producing high-end precision angular contact ball bearings with the registered trademark "ACBB". Located in Wuxi, Jiangsu Province. The company has passed ISO9001-2010 quality management system certification. At present, the company's main products include angular contact ball bearing, ultra-high-speed ceramic ball bearing, CNC machine tool spindle bearing, thrust angular contact ball bearing, self-aligning ball bearing, double-row angular contact bearing, etc. Products are widely used in engraving machines, high-speed motors, CNC machine tool spindles, vacuum pump equipment, molecular pump equipment and other fields.