①PCD hardness of up to 8000HV, for the carbide 80 to 120 times; ②PCD thermal conductivity of 700W / mK, 1.5 to 9 times for the carbide, even higher than the PCBN and copper, so PCD tool heat transfer quickly; ③PCD friction coefficient is generally only 0.1 to 0.3 (carbide friction coefficient of 0.4 to 1), so PCD tool can significantly reduce the cutting force; ④PCD thermal expansion system is only 0.910 -6 ~ 1.1810 -6, only equivalent to Carbide 1/5, so PCD tool thermal deformation is small, high precision machining; ⑤ PP cutter and non-ferrous metal and non-metallic materials, the affinity is very small, in the processing of the chip is not easy to bond on the tip of the formation of BUE The