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PFERD vitrified bond mounted point in hardness K is manufactured from a grain mix of pink aluminum oxide and regular aluminum oxide in a vitrified bond. In a medium-hard bond, this abrasive grain combination leads to a good stock removal rate and a long service life. The hardness K is particularly suitable for general use on cast iron parts when used with high peripheral speeds. Application: cleaning of work pieces made from grey and nodular cast iron. Grinding out of shrinkage holes in grey and nodular cast iron components. Mounted points of hardness K achieve their best performance at a peripheral speed of 6, 000 - 9, 800 SFPM. Flexible shafts, electric grinders and air-powered straight grinders are suitable tool drives. Specification: shape/form: W222; diameter (inches): 1; Length (inches): 2; shank diameter (inches): 1/4; shank Length (inches): 1 1/2; Grit: 30; maximum rotational speed (RPM): 15900; material: aluminum oxide.