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  • BSI
    BS 978-3:1952 Specification for fine pitch gears - Bevel gears
    Edition: 1952
    $267.71
    / user per year

Description of BS 978-3:1952 1952

This part applies to machine cut conical gears, of the classes described below, connecting intersecting shafts and having pitches from 20 to 80 DP. The teeth shall have a normal pressure angle of 20° at the pitch cone and they may be straight or curved (see Figure 1 to Figure 4). The standard provides for Class A gears for use where a high degree of accuracy is required, and Class B gears for other applications.

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For integrating electricity meters the particular form of gear herein specified is not necessary and it is recognised that other existing forms of gear will continue to be used.



Form, proportions of machine cut conical gears connecting intersecting shafts in pitch range 20 to 80 D.P. Straight or curved teeth with normal pressure angle 20 at pitch cone. Addendum modification, permissible errors and tolerances for Class A, Class B gears.

Standard NumberBS 978-3:1952
TitleSpecification for fine pitch gears - Bevel gears
StatusConfirmed
Publication Date1952-01-24
DescriptorsImperial system, Gear drives, Gear parameters, Spiral gears, Bevel gears, Clock movements, Conical shape, Basic racks, Grades (quality), Dimensions, Time-measuring instrument components, Instruments, Dimensional tolerances, Tooth profiles
ICS21.200 Gears
CommitteeMCE/5
ISBN0 580 34085 6
PublisherBSI
Pages12

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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