Drills and reamers Specification for twist drills

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

15-04-1993

Publisher

British Standards Institution

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.

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.

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

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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BS 328-1:1993

Drills and reamers Specification for twist drills

Table of Contents

Abstract

Scope

General Product Information

International Equivalents

Standards Referencing This Book

Category

Subcategory