... -910mm 4.High quality Vitrified bonded combined for PCD wheel grinding The vitrified wheels are made of diamond or CBN, the ... or CBN grain size can be from rough to fine, 30#, 50#, 60#, 80#, 100#, 120#, 140#, 150#, 170#, 200# till ... carbide, steel, mold 2) Glass and optical glass 3) Stone, concrete, asphalt and ceramic 4) Magnets 5) Other deep manufacturing industries