Reference number
ISO 866:2016
© ISO 2025
International Standard
ISO 866:2016
Centre drills for centre holes without protecting chamfers — Type A
Edition 2
2016-08
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Published (Edition 2, 2016)
This publication was last reviewed and confirmed in 2024. Therefore this version remains current.

ISO 866:2016

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Format
CHF 43
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Abstract

ISO 866:2016 specifies the dimensions of centre drills for centre holes without protecting chamfers (Type A).

It covers only metric dimensions, which are regarded as the only recommended dimensions in the future for this type of drill.

The flutes may be straight or spiral, depending on the manufacturer's discretion.

Unless otherwise indicated, these drills will be right-hand cutting.

Recommended dimensions for Type A centre holes, which can be obtained by a rational use of the centre drills listed in this International Standard, are given in Annex A.

General information

  • Status
     : Published
    Publication date
     : 2016-08
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 2
    Number of pages
     : 6
  • Technical Committee :
    ISO/TC 29/SC 9
    ICS :
    25.100.30 
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