Cubic boron nitride -CBN abrasives is the second hardest superabrasives materials, cubic boron nitride is the ideal material to used in resin, metal, vitrified and electroplated bond CBN grinding tools for maching of HSS tols and hard alloys.( Grain sizes from 40/ 50 to 325/ 400 are available 1. CBN-A1 powder is amber colored cubic boron nitride crystal, semi tough, irregular monocrystal used in resin bond system 2. CBN-A2 is highly crystallized, extremely tough, widely used in metal bond system and electroplated tools. Grain sizes from 40/ 50 to 325/ 400 are available 3. CBN-B1 is black colored CBN crystal, low toughness, easily fractured monocrystal, suited for resin bond system and grinding in low temperature. 4. CBN-B2 is black colored CBN monocrystal, mainly used in vitreous bond system and electroplated tools.It feasures optimum balance of fracture strength and breakdown characteristics to enhance wheel life and surface polish.