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  • BSI
    BS 1734:1951 Specification for micrometer heads
    Edition: 1951
    $281.30
    / user per year

Description of BS 1734:1951 1951

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



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.

Standard NumberBS 1734:1951
TitleSpecification for micrometer heads
StatusConfirmed
Publication Date1951-04-16
DescriptorsFlatness (surface), Micrometers, Adjustment, Marking, Accuracy, Graduations, Square shape, Dimensions
ICS17.040.30 Measuring instruments
CommitteeTPR/1
ISBN0 580 35798 8
PublisherBSI
Pages10

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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