scope:

NEN-ISO 7079 specifies the dimensions of core drills with parallel shanks and with Morse taper shanks. It includes two tables for each of the above specified types, giving respectively - the dimensions for the preferred diameter (see Tables 1 and 2), and - the corresponding lengths defined in terms of diameter ranges (see Tables 3 and 4). The tables show only metric dimensions which are alone recommended in the future for this type of drill. Unless otherwise stated, these drills will be right-hand cutting drills.