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This International Standard specifies a method for determining or checking the grit size of superabrasives (diamond or cubic boron nitride) as used for the manufacture of industrial products such as grinding wheels and saws. It is applicable to grit size designations as defined in Tables 2 and 3. This International Standard describes the grit size designations, the size limits, the sieves to be used in determining them and the procedure to be adopted for checking the grit size exclusive of any coating.