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Standard number: | BS 1734:1951 |
Pages: | 10 |
Released: | 1951-04-16 |
ISBN: | 0 580 35798 8 |
Status: | Standard |
DESCRIPTION
BS 1734:1951
This standard BS 1734:1951 Specification for micrometer heads is classified in these ICS categories:
- 17.040.30 Measuring instruments
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
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.