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PFERD vitrified bond mounted point in hardness f-alum is manufactured from green silicon Carbide in a vitrified bond. The extremely open microstructure and a special impregnation allow extremely high stock removal rates when working on soft, greasy materials. The hardness f-alum is produced especially for general use on aluminum and non-ferrous metals and is characterized by its high abrasive qualities and stock removal. Application: removal of burrs on cast aluminum components. Grinding of Brass, zinc and copper. Chamfering and weld preparation on aluminum profiles. Mounted points of hardness f-alum achieve their best performance at a peripheral speed of 4, 000 - 7, 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: 80; maximum rotational speed (RPM): 15900; material: silicon Carbide.