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BS 1734:1951

Current
Current

The latest, up-to-date edition.

Specification for micrometer heads
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

04-16-1951

Co-operating organizations
Foreword
Specification
1 Scope
2 Nomenclature
3 Material
4 Micrometer screw
5 Spindle
6 Thimble and barrel
7 Graduations
8 Adjustments
9 Measuring face
10 Accuracy
11 Case
12 Packing
13 Marking

Heads for assembly with measuring or machine tools. Three types, thimble diameters below 1 in, 1 in and below 2 in, 2 in and over; measuring ranges ½ in, 1 in, 13 mm, 25 mm. Material, micrometer screw, spindle, thimble and barrel adjustments, measuring faces and graduations, dimensions and standards of accuracy.

This British Standard relates to micrometer heads having measuring ranges of:

  1. ½ in.
  2. 1 in.
  3. 13 mm.
  4. 25 mm.

It applies to micrometer heads with rotatable spindles and with non-rotatable spindles, classed according to the following ranges of thimble diameter (dia. D, Figure 1):—

Type 1 Below 1 in. thimble diameter.

Type 2 1 in. and below 2 in. thimble diameter.

Type 3 2 in. thimble diameter and over.

NOTE Micrometer heads of the larger types with non-rotatable spindles may be supplied to special orders with dimensions approximately similar to those given in Table 2 and to an accuracy similar to that shown in Table 4

Committee
TPR/1
DevelopmentNote
Reviewed and confirmed by BSI, February 2012. (01/2012)
DocumentType
Standard
Pages
10
PublisherName
British Standards Institution
Status
Current

Standards Relationship
AS B140-1955 Identical

BS 1685:1951 Specification for bevel protractors (mechanical and optical)
BS 959:1950 Specification for internal micrometers (including stick micrometers)
BS 959:2008 Specification for internal micrometers (including stick micrometers)
BS 6468:1984 Specification for depth micrometers
BS 6468:2008 Specification for depth micrometers
08/30177716 DC : DRAFT JUNE 2008 BS 959 - SPECIFICATION FOR INTERNAL MICROMETERS (INCLUDING STICK MICROMETERS)
08/30177718 DC : DRAFT JUNE 2008 BS 6468 - SPECIFICATION FOR DEPTH MICROMETERS

BS 1790:1961 Specification for length bars and their accessories (imperial units)
BS 959:1950 Specification for internal micrometers (including stick micrometers)
BS 1685:1951 Specification for bevel protractors (mechanical and optical)
BS 888:1950 Specification for slip (or block) gauges and their accessories
BS 1054:1954 Engineers comparators for external measurement
BS 870:1950 Specification for external micrometers
BS 818(1963) : LATEST CAST IRON STRAIGHT EDGES (BOW SHAPED AND I-SECTION)
BS 939:1962 Specification for engineers\' squares (including cylindrical and block squares)
BS 907(1955) : LATEST
BS 817(1939) : LATEST
BS 906-1:1972 Specification for engineers\' parallels Metric units
BS 887:1950 Specification for precision vernier callipers
BS 852:1939 Specification for toolmakers\' straightedges
BS 1643:1950 Specification for precision vernier height gauges
BS 869:1939 Toolmakers\' flats and high precision surface plates.

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