BS ISO 866:2016
Current
The latest, up-to-date edition.
Centre drills for centre holes without protecting chamfers. Type A
31-08-2016
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).
| Committee |
W/-
|
| DocumentType |
Standard
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
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.
| 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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