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  • BSI
    BS 1937:1953 Specification for engineers\' ratchet braces and drilling pillars
    Edition: 1953
    $316.70
    / user per year

Description of BS 1937:1953 1953

This British Standard specifies requirements for engineers’ ratchet braces and drilling pillars.

The ratchet braces are of the following types:—

  1. Long head (box) type, having an open or totally enclosed ratchet and available with either
    1. Square taper nozzle, or
    2. Morse taper nozzle.
  2. Short head type, having an open or totally enclosed ratchet. Suitable for square taper shank drills only.
  3. Extra short head type (pin brace), having an open or totally enclosed ratchet. Suitable for square taper shank drills only.
  4. Short head type heavy duty (boiler brace), having totally enclosed ratchet, available with square taper nozzle.
  5. Bit stock type, having an open or totally enclosed ratchet. Suitable for bit stock drills only.

Nomenclature and definitions are given, together with requirements for materials, heat treatment, hardness, finish and accuracy of assembly. Ranges of dimensions of the various types of brace and of the drilling pillars are also included.



Sizes, dimensions, material, for following open and enclosed drive ratchet braces: long head (box), short head, extra short head (pin brace), short head heavy duty (boiler brace), bit stock. Dimensions of drilling pillars for use with braces. For use with drills having Morse taper or square taper shanks, when necessary employing an adaptor, conversion details of which are included.

Standard NumberBS 1937:1953
TitleSpecification for engineers' ratchet braces and drilling pillars
StatusConfirmed
Publication Date1953-02-10
DescriptorsHand tools, Design, Hardness, Ratchet braces, Dimensions, Hand-drills, Heat treatment, Drilling pillars, Drills, Steels
ICS25.100.30 Drills, countersinks, reamers
CommitteeMTE/15
ISBN0 580 35987 5
PublisherBSI
Pages22

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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