BS 1937:1953

This standard BS 1937:1953 Specification for engineers' ratchet braces and drilling pillars is classified in these ICS categories:

• 25.100.30 Drills, countersinks, reamers

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.