Single crystal diamond for cutting tools must be large particles (mass greater than 0.1g, the minimum diameter of not less than 3mm), mainly for surface roughness, geometric accuracy and dimensional accuracy of the higher requirements of precision and ultra-precision machining applications field.

    Natural single crystal diamond is the most wearable material in diamond. It is fine texture, after fine grinding, cutting edge edge blunt radius can be as small as 0.008 ~ 0.005μm. However, the natural single crystal diamond is brittle, its crystal anisotropy, different crystal face or the same crystal surface in different directions of the crystal hardness are different, in the grinding and use must be selected in the appropriate direction. Due to the harsh conditions of use, coupled with natural monocrystalline diamond resources are limited, the price is very expensive, so most of the production using PCD, PCD / CC and CVD diamond tools. Natural single crystal diamond is mainly used for the production of non-ferrous metal ultra-precision machining or gold jewelry.

    Synthetic single crystal diamond size, shape and performance are well consistent, the current high temperature and high pressure technology is maturing, to prepare a certain size of synthetic single crystal diamond, especially in the processing of high wear-resistant layered wood, the Performance is better than PCD diamond, will not cause premature passivation of the edge.