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BSI BS 1734:1951

Specification for micrometer heads
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BSI BS 1734:1951

Specification for micrometer heads

PUBLISH DATE 1951
PAGES 12
BSI BS 1734:1951

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.

SDO BSI: British Standards Institution
Document Number 1734
Publication Date April 16, 1951
Language en - English
Page Count
Revision Level
Supercedes
Committee TPR/1
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