Diamond tool according to materials which several species classification

Single crystal diamond cutting tool must be used for large particles ( mass greater than 0.1g, the best path length not less than 3mm), mainly used in surface roughness , geometry, high precision and dimensional accuracy requirements of precision and ultra precision machining applications fields.
Natural diamond single crystal diamond is the most wear-resistant material . Fine texture of its own , after fine grinding, cutting edge concrete crack chaser  edge edge radius as small as 0.008 ~ 0.005μm. But more brittle natural single crystal diamond , the crystal anisotropy, different surfaces or in the same plane of the crystal in different directions were different hardness , during grinding and use must choose the right direction . The use of harsh conditions, coupled with natural single crystal diamond resources are limited, the price is very expensive, so they use a production PCD, PCD / CC and CVD diamond tools . Some natural single crystal diamond is mainly used for ultra-precision machining non-ferrous metals or gold jewelry production .
Synthetic single crystal diamond the size, shape and performance are in good agreement , present due to high pressure technology matures , a certain size can be prepared by synthetic single crystal diamond , especially in the processing of high wear-resistant laminated wood , it performance than PCD diamond cutting edge will not cause premature passivated.
Synthetic polycrystalline diamond (PCD) and synthetic polycrystalline diamond and carbide composite blade (PCD / CC)
PCD is at high temperature ( about 1800 ℃), pressure (5 ~ 6MPa) , the use of cobalt and other metal binding agent to a number of polycrystalline diamond crystal powder polycrystalline material , although slightly lower than the hardness of a single crystal diamond , but it is randomly oriented diamond grains polymerization , is isotropic , as can be arbitrarily oriented cutting tool sharpening , no natural diamond that  cup grinding wheels must be selected as the best cleavage plane as a rake . In cutting, the cutting edge is very sensitive for accidental damage , wear resistance is also strong , long stay sharp cutting edge , can be used when machining high cutting speed and larger cutting depth ( to eat deep ) , life is generally higher than the WC-based cemented carbide cutting tools 10 to 500 times , and because the metal binding agent PCD has conductivity , making PCD easy to cut to shape , and is a rich source of raw materials , the price is only a few tenth of natural diamond a fraction of the ten have become traditions WC-based cemented carbide cutting tools , high-performance alternatives.
PCD inserts to improve the toughness and weldability in the cemented carbide substrate , sintered or pressed on the  sds hammer drill bits surface of 0.5 ~ 1mm thick layer of the composition of PCD diamond composite blade (PCD / CC). PCD / CC welding or machine folder available way of making knives. Due to its good weldability , regrinding easy , low cost, and therefore widely used. Hereupon , PCD and PCD / CC sharp cutting edge of the tool and are not as good surface quality single crystal diamond , while its workability is poor, the grinding ratio is small , it is difficult according to the geometry of any shape head , still not easy to manufacture with chipbreakers indexable end mills and other geometric shapes and complex products. CVD diamond CVD diamond is a diamond material of high wear resistance of pure , non- binding agent , which is at low pressure (<0.1MPa) prepared under . CVD diamond films are coated CVD (CD) and CVD thick (TFD) forms.
CD is a CVD ( chemical vapor deposition ) process , the carbide substrate ( K type alloy used ) is deposited to a thickness of about 10 ~ 30μm, composed of a polycrystalline diamond film is made .