ISO 2541:2016

Centre drills for centre holes with radius form — Type R

Publication date:   Oct 24, 2016

General information

90.60 Close of review   Mar 14, 2022


ISO/TC 29/SC 9 Tools with defined cutting edges, holding tools, cutting items, adaptive items and interfaces

International Standard

25.100.30   Drills, countersinks, reamers



Language in which you want to receive the document.


ISO 2541:2016 specifies the dimensions of centre drills for centre holes with radius ? Type R.
It covers only metric dimensions, regarded as the only recommended dimensions in the future for this type of drills.
The flutes can be straight or spiral at the option of manufacturer.
Unless otherwise stated, these drills are right-hand cutting.
Annex A gives the recommended dimensions for the centre holes, Type R, which can be obtained by a rational use of the centre drills listed in this International Standard.

Life cycle


ISO 2541:1972


ISO 2541:2016
90.60 Close of review
Mar 14, 2022