As an important part supporting the mechanical rotating body and ensuring its rotation accuracy, the bearing is widely used in major machinery industries. With the continuous advancement of modern technology, the requirements for bearings are gradually improved, and in order to meet increasingly diverse bearing characteristics, The tool industry is also constantly developing high-precision, high-efficiency, high-quality tool materials. It is very important to select the tool material when machining the bearing. Choose a series of grades such as Halnn super-hard cubic boron nitride tool BN-S20, which can efficiently process the bearing, effectively improve its processing efficiency and reduce production cost.