BS 328-1:1993
Current
The latest, up-to-date edition.
Drills and reamers Specification for twist drills
Hardcopy , PDF
English
15-04-1993
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Committees responsible
Foreword
Specification
1. Scope
2. References
3. Definitions
4. Dimensions
5. Features of design
6. Materials and hardness
7. Marking
8. Performance
Annex
A. (normative) Method of test
Tables
1. Parallel shank jobber series twist drills.
Preferred sizes
2. Parallel shank stub series twist drills.
Preferred sizes
3. Parallel shank long series twist drills.
Preferred sizes
4. Parallel shank extra long series twist drills.
Preferred sizes
5. Morse taper shank twist drills. Preferred sizes
6. Morse taper shank extra long twist drills.
Preferred sizes
7. Parallel shank jobber series twist drills.
General sizes
8. Parallel shank stub series twist drills.
General sizes
9. Parallel shank long series twist drills.
General sizes
10. Morse taper shank twist drills. General sizes
11. Limits of tolerance on diameter
12. Flute length l of Morse taper shank extra long
twist drills
13. Limits of tolerance on overall length and flute
length
14. Material - cutting portion only
A.1 Table of penetrations (metric)
A.2 Table of penetrations (imperial)
Dimensions and technical requirements.
| Committee |
W/-
|
| DevelopmentNote |
Supersedes BS 328-1(1986) & 91/80383 DC. (04/2003) Reviewed and confirmed by BSI, December 2009. (11/2009)
|
| DocumentType |
Standard
|
| Pages |
40
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This Part of BS 328 specifies requirements for the dimensions, design, materials, hardness values and performance for twist drills made of high-speed steel with either parallel or Morse taper shanks.
A method of test for the drills specified is given in Annex A.
NOTE The requirements in this standard may also form the basis for the specification of special purpose twist drills as agreed between the buyer and supplier.
This British Standard is not applicable to woodworking or do-it-yourself (D.I.Y) drills. Its use is for drills manufactured for general engineering applications.
| Standards | Relationship |
| ISO 494:2017 | Identical |
| AS/NZS 2438.1:1994 | Identical |
| ISO 235:2016 | Identical |
| ISO 3292:2016 | Identical |
| ISO 3291:2016 | Identical |
| BS 240:1986 | Method for Brinell hardness test and for verification of Brinell hardness testing machines |
| ISO 3291:2016 | Extra-long Morse taper shank twist drills |
| ISO 3292:2016 | Extra-long parallel shank twist drills |
| BS 1660-1:1992 | Machine tapers Specification for shanks and sockets with self-holding tapers (Morse and metric 5%) |
| BS 4500-1.1(1990) : AMD 7630 | ISO LIMITS AND FITS - GENERAL, TOLERANCES AND DEVIATIONS - SPECIFICATION FOR BASES OF TOLERANCES, DEVIATIONS AND FITS |
| ISO 4957:1999 | Tool steels |
| BS 4500-1.2(1990) : AMD 7631 | ISO LIMITS AND FITS - GENERAL, TOLERANCES AND DEVIATIONS - TABLES OF COMMONLY USED TOLERANCE GRADES AND LIMIT DEVIATIONS FOR HOLES AND SHAFTS |
| ISO 494:2017 | Cylindrical shank twist drills — Long series |
| ISO 235:2016 | Parallel shank jobber and stub series drills and Morse taper shank drills |
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