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BS ISO 603-17:2014
Bonded abrasive products. Dimensions. Spindle mounted wheels (ISO type 52) (British Standard)
ISO 603-17:2014 specifies the current shapes, nominal dimensions and limit deviations, in millimetres, of Type 52: Spindle mounted wheels. These bonded abrasive products are intended to be used for hand-held grinding and manually guided or on hand-held power tools guided by hand.
British Standards Institution [bsi]