BS 721-1:1963 - Specification for worm gearing. Imperial units

BS 721-1:1963

Specification for worm gearing. Imperial units

Status : Confirmed, Current   Published : April 1963



Cylindrical involute helicoid worms with a normal pressure angle of 20° in a range of axial modules from 0.052 in to 1 in. Design, formulae for calculating worm and wormwheel dimensions; four gear classes, with tolerances for pitch, profile and worm thread thickness, and five grades of backlash for assembly. Drawings show information to be given when ordering. Appendices: determination of load capacity, design calculations for typical gears, design procedure based on axial pitch of the worm, design of worms to suit standard diametral pitch cutting tools corresponding to the normal pitch of the worm.

Standard NumberBS 721-1:1963
TitleSpecification for worm gearing. Imperial units
StatusConfirmed, Current
Publication Date25 April 1963
Confirm Date24 May 2021
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Amended ByAMD 4364
PD 5919
DescriptorsGrades (quality), Strength of materials, Gear wheels, Wear, Tensile strength, Gear pairs, Gear parameters, Loading, Friction, Dimensions, Worm gears, Thread pitch, Designations, Design, Load capacity, Imperial system, Dimensional tolerances, Worms (gears), Power measurement, Basic racks, Gear drives, Tooth profiles, Mathematical calculations
Title in FrenchEngrenages a vis sans fin. Specification. Unites imperiales
Title in GermanSchraubenraeder. Spezifikation. Englische Einheiten
ISBN0 580 34579 3
File Size1.224 MB

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