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BSI
BS ISO 866:2016

BS ISO 866:2016

Current

Current

The latest, up-to-date edition.

Centre drills for centre holes without protecting chamfers. Type A

Published date

31-08-2016

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Dimensions
3 Designation
Annex A (normative) - Dimensions for Type A centre holes
        and choice of the dimensioning method
Annex B (informative) - Relationship between designations in
        this International Standard and ISO 13399
Bibliography

Defines the dimensions of centre drills for centre holes without protecting chamfers (Type A).

This International Standard specifies the dimensions of centre drills for centre holes without protecting chamfers (TypeA). 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 TypeA centre holes, which can be obtained by a rational use of the centre drills listed in this International Standard, are given in AnnexA.

Committee
W/-
DocumentType
Standard
PublisherName
British Standards Institution
Status
Current

Standards Relationship
ISO 866:2016 Identical

ISO 2541:2016 Centre drills for centre holes with radius form — Type R
ISO 2540:2016 Centre drills for centre holes with protecting chamfer — Type B

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