BS 1734:1951
Current
The latest, up-to-date edition.
Specification for micrometer heads
Hardcopy , PDF
English
16-04-1951
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.
| Committee |
TPR/1
|
| DevelopmentNote |
Reviewed and confirmed by BSI, February 2012. (01/2012)
|
| DocumentType |
Standard
|
| Pages |
10
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This British Standard relates to micrometer heads having measuring ranges of:
- ½ in.
- 1 in.
- 13 mm.
- 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
| Standards | Relationship |
| AS B140-1955 | Identical |
| UNE-EN 12123:2022 | Identical |
| UNE-EN ISO 20501:2022 | 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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