TYPES OF GRINDING WHEELS
GRINDING WHEEL Wheels are made of fine grains of abrasive ... silicon carbide black grit with approximately 95% silicon carbide. ... strengths like steel; high carbon and high speed steel and tough bronze. Coarse 10 12 14 16 20 24 - Medium 30 36 46 54 60 - - Fine 80 100 120 150 180 - -