Centre drills for centre holes without protecting chamfers. Type A Ingestion-build-81111 each interval obtained by interlaboratory

each interval obtained by interlaboratory consensus with respect to one specified measurement procedure

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Component Range SiO2 0

Centre drills for centre holes without protecting chamfers. Type A Ingestion-build-81111 each interval obtained by interlaboratory1 Scope This International Standard specifies the dimensions of centre drills for centre holes without protecting chamfers (Type A). It covers only metric dimensions, which are regarded as the only recommended dimensions in the future for this type of drill. The flutes may be straight or spiral, depending on the manufacturers discretion. Unless otherwise indicated, these drills will be right hand cutting. Recommended dimensions for Type A centre