1, Diamond Mounted Wheels 2, CBN mounted Wheels, Points; 3, Vitrified bond CBN Abrasives; 4, ISO 9001:2000 ... Certified Supplier Diamond / CBN Vitrified Bond Internal Grinding Wheels. Typically Applications:Grinding of Inner and outer faces of Ball ... 4010122Precision grinding: 3A1 5015172Dia.: D91 CBN: B91 Vitrified bond CBN Wheels for Internal Grinding