Cubic boron nitride cutting tools (PCBN) 
 PCBN sintered cubic boron nitride is used as the tool system, compared with the original tool material with higher hardness and more excellent heat resistance. Therefore, the production of CBN cutting tools can be processed in the past to rely on grinding of hardened steel and cast iron of high hardness and other difficult materials, high-speed finishing of cast iron and can play as long life of the tool until a number of excellent performance. Mainly used for cutting ferrous metals;