BS 328-1:1959
Date published:
Drills and reamers, Twist drills
Dimensions, tolerances for parallel shank jobber series, stub, parallel shank long series twist drills and for Morse taper shank drills, core drills. Tables of inch and metric sizes; tables for each drill type, so that non-listed sizes may be made to standard dimensions. Dimensions for taper square shank and bit stock twist drills, etc.
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BS 328-1:1959
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