What is ISO 2540 – Type- B centre drills about?

ISO 2540 specifies the dimensions of centre drills for centre holes with protecting chamfer — Type B.

ISO 2540 covers only metric dimensions, regarded as the only recommended dimensions in the future for this type of drill.

The flutes can be straight or spiral at the option of the manufacturer. Unless otherwise stated, these drills are right-hand cutting.

Who is ISO 2540 – Type- B centre drills for?

ISO 2540 on type-B centre drills is useful for:

Drill bit manufacturers
Quality control personnel
Suppliers of drill bits

Why should you use ISO 2540 – Type- B centre drills?

Centre drills are used to drill the initial holes for other drill bits to follow up on. Hence, the centre drills need to be strong and well designed to execute their tasks.

ISO 2540 provides you with detailed dimensions for type-B centre drills that help you in the production and quality control phases. ISO 2540 also provides you designation guidelines to better utilize the guidance of the ISO 13399 series on cutting tool data representation and exchange.

Overall, the guidelines of ISO 2540 help you to produce quality Type B centre drills.

What’s changed since the last update?

BS ISO 2540:2016 replaces ISO 2540:1973, of which it constitutes a minor revision, notably with the addition of Annex B, which gives the relationship between the designations of BS ISO 2540:2016 and the ISO 13399 series.

BS ISO 2540:2016

Centre drills for centre holes with protecting chamfer. Type B

Current

Published:

30 Nov 2016