ISO 235-2016 pdf free.Parallel shank jobber and stub series drills and Morse taper shank drills. This document specifies the dimensions of the following three types of drills: a) parallel shank drills, stub series; b) parallel shank drills, jobber series; c) Morse taper shank drills. It comprises, for each type of drill mentioned above, three tables giving, respectively: a) the dimensions in millimetres; b) the dimension in inches; c) the corresponding lengths, in millimetres and in inches, set out as functions of diameter steps. 2 Normative references There are no normative references in this document. 3 Terms and definitions No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.orgJ — ISO Online browsing platform: available at http://www.iso.org/obp 4 Interchangeability The numerical tables have been drawn up in such a way as to ensure that the standard dimensions in millimetres and inches correspond as closely as possible. To this end, the complete range of diameters has been subdivided into a number of steps, the limits of which have been derived from the preferred number series for the metric values and converted directly from…