Drills and reamers Specification for twist drills

Available format(s)

Hardcopy , PDF

Superseded date

15-04-1993

Language(s)

English

Published date

31-03-1986

Publisher

British Standards Institution

Dimensions and tolerances for parallel shank, jobber, stub, long and extra long series of twist drills. Also for Morse taper shank and Morse taper shank extra long drills. Tables summarise both imperial and metric sizes for each type of drill.

Committee	W/-
DevelopmentNote	Supersedes BS 328(1950) (07/2004)
DocumentType	Standard
Pages	1
PublisherName	British Standards Institution
Status	Superseded
Supersedes	BS 328-1:1959

Standards	Relationship
ISO 3291:2016	Similar to
ISO 3292:2016	Similar to
ISO 494:2017	Similar to
ISO 235:2016	Similar to

ISO 3291:2016	Extra-long Morse taper shank twist drills
ISO 3292:2016	Extra-long parallel shank twist drills
BS 4500-1:1969	ISO limits and fits General, tolerances and deviations
ISO 494:2017	Cylindrical shank twist drills — Long series
ISO 235:2016	Parallel shank jobber and stub series drills and Morse taper shank drills