... High speed, long usage life CUTTING DISC for metalSuitable for cutting and grinding of carbon u-steel,alloy steel ... materialsHigh speed, long usage lifeThe max safe use of linear speed is 80m/s ,the hardness medium iron to ... amount of wheel wear medium, longer life, especially suitable for cutting and grinding of carbon u-steel,alloy steel, ... so on. The most widely appliacable. CUTTING DISC for metal