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Grinding Balls Mfg Association

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Best wheel for general dry grinding.Norton 1963 patent 3646713 this is the 32a abrasive norton 1986 patent 4623364 this is the seeded gel process it appears that norton stumbled on this process by accident the seeding crystals required for producing the abrasive originate from the alumina grinding balls used to mill the gel the crystal size is 0 4 microns the abrasive does.