BS 1937:1953
Current
The latest, up-to-date edition.
Specification for engineers\' ratchet braces and drilling pillars
Hardcopy , PDF
English
10-02-1953
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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.
| Committee |
MTE/15
|
| DevelopmentNote |
Reviewed and confirmed by BSI, January 2011. (12/2010)
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This British Standard specifies requirements for engineers’ ratchet braces and drilling pillars.
The ratchet braces are of the following types:—
- Long head (box) type, having an open or totally enclosed ratchet and available with either
- Square taper nozzle, or
- Morse taper nozzle.
- Short head type, having an open or totally enclosed ratchet. Suitable for square taper shank drills only.
- Extra short head type (pin brace), having an open or totally enclosed ratchet. Suitable for square taper shank drills only.
- Short head type heavy duty (boiler brace), having totally enclosed ratchet, available with square taper nozzle.
- 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.
| Standards | Relationship |
| UNE-EN ISO 18135:2018 | Identical |
| DEFSTAN 51-11(PT28)/2(1993) : 1993 | HAND TOOLS, GENERAL PURPOSE - PART 28: (A): MISCELLANEOUS ITEMS (B): HAND TOOLS FOR USE IN HAZARDOUS OR CRITICAL CONDITIONS |
| BS 970:1955 | Wrought steels (bars billets and forgings |
| BS 51(1939) : LATEST | WROUGHT IRON FOR GENERAL ENGINEERING PURPOSES(GRADES A,B,C,AND D) |
| BS 427:1990 | Method for Vickers hardness test and for verification of Vickers hardness testing machines |
| BS 328:1950 | Twist drills and combined drills and countersinks (centre drills) |
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