Japan stays in company of friendly electrical engineering HARD MetaL to roll out two kinds to be used at cutting to machine the PCBN cutting tool of car spare parts. One kind basically is used at machining workpiece of metallurgy of iron radical powder and cast, its characteristic is the CBN content in cutting tool material (concentration percentage by volume is compared) in 80% above, bond is compound of Co, Al. Cent of cutting tool of this kinds of PCBN is BN700, BN800, BN600 3 brands, hardness, intensity and hot conductibility are exceedingly good; It is hard steel, difficult that another kind basically is used at processing oil treatment is cast-iron wait, its characteristic is the CBN content in cutting tool material is 40% ～ 80% , bond is the Ti with low affinity of pair of metal of iron a group of things with common features to fasten pottery and porcelain. Cent of cutting tool of this kinds of PCBN is mixed for BN500, BN350 hard steel of temper by dipping in water is special 3 brands, the most outstanding characteristic is wear-resisting function exceedingly good. CNC MillingCNC Machining