BS 328-2:1972
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Drills and reamers Combined drills and countersinks (centre drills)
Hardcopy , PDF
English
28-07-1972
22-05-2026
Cooperating organizations
Foreword
Specification
1. Scope
2. Manufacturing requirements for combined drills
and countersinks (centre drills)
3. Dimensions of combined drills and countersinks
(centre drills)
4. Designation
5. Combined drills and countersinks (centre drills)
for centre holes without protecting chamfer. Type A
6. Combined drills and countersinks (centre drills)
for centre holes with protecting chamfer. Type B
7. Combined drills and countersinks (centre drills)
for centre holes with radius form. Type R
Appendices
A. Recommended dimensions for centre holes. Type A
B. Recommended dimensions for centre holes. Type B
C. Recommended dimensions for centre holes. Type R
Tables
1. Dimensions of combined drills and countersinks
(centre drills). Type A
2. Dimensions of combined drills and countersinks
(centre drills). Type B
3. Dimensions of combined drills and countersinks
(centre drills). Type R
4. Dimensions for centre holes. Type A
5. Dimensions for centre holes. Type B
6. Dimensions for centre holes. Type R
Figures
1. Single-ended combined drills and countersinks
(centre drills). Type A (d < 0.8 mm)
2. Double-ended combined drills and countersinks
(centre drills). Type A (d > 1 mm)
3. Combined drills and countersinks (centre drills).
Type B
4. Combined drills and countersinks (centre drills).
Type R
5. Type A centre hole
6. Type B centre hole
7. Type R centre hole
Designations and dimensions of combined drills and countersinks (centre drills) for centre holes, without protecting chamfers, with protecting chamfers or of radius form.
| Committee |
W/-
|
| DevelopmentNote |
Supersedes BS 328(1950) (07/2004) Reviewed and confirmed by BSI, December 2009. (11/2009)
|
| DocumentType |
Standard
|
| Pages |
14
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
Withdrawn:This standard is no longer used
| Standards | Relationship |
| ISO 2541:2016 | Identical |
| ISO 866:2016 | Identical |
| ISO 2540:2016 | Identical |
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