Made of diamond or CBN,can be used for: the parts of Motor, Bearing, Semi-conductor,Gass,Optics,Metal,Ceramic,PCD/PCBN, etc. The hardness of the ceramic diamond wheels are harder than metal bonded diamond wheels and resin bonded diamond wheels, It owns the advantages of other kinds of wheels. the ceramic diamond wheels will have longer using life, and can be cutting freely. These diamond wheels ...