Drills and reamers - Specification for twist drills Ingestion-build-83346 This document specifies methods by

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Drills and reamers - Specification for twist drills Ingestion-build-83346 This document specifies methods by1 Scope This Part of BS 328 specifies requirements for the dimensions, design, materials, hardness values and performance for twist drills made of high speed steel with either parallel or Morse taper shanks. A method of test for the drills specified is given in Annex A. NOTE The requirements in this standard may also form the basis for the specification of special purpose twist drills as agreed between the buyer and supplier. This British Standard is