BS 4235-1:1972

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Specification for metric keys and keyways – Parallel and taper keys

Published By	Publication Date	Number of Pages
BSI	1972	26

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Categories: 21.120.30 - Keys and keyways, splines, BSI

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Description

This British Standard relates to the following types of keys and keyways with dimensions in millimetres:

square parallel,
rectangular parallel,
square taper, gib-head and plain,
rectangular taper, gib-head and plain.

In addition, a fourth class of fit is provided in this British Standard to give an interference fit.

Three classes of fit are provided for the square and rectangular parallel keys and keyways, namely “free”, “normal” and “close”, and the dimensions and tolerances specified are in accordance with ISO Recommendations R 773³⁾ and R 774⁴⁾.

Parallel and taper keys and keyways for shafts of 6 mm to 500 mm diameter. For square and rectangular parallel keys three classes of fit, ‘free’, ‘normal’ and ‘close’, are foreseen.

Additional information

Status	Confirmed
Pages	26
Publication Date	1972-02-22
ISBN	0 580 06988 5
Related National Standard Of	ISO/R 773, ISO/R 774
Standard Number	BS 4235-1:1972
Title	Specification for metric keys and keyways – Parallel and taper keys
Descriptors	Form tolerances, Shape, Taper keys, Dimensional tolerances, Gib-head keys, Fits, SI system (metric), Keys (engineering), Dimensions, Parallel keys, Locking and locating devices
Publisher	BSI
Committee	MCE/5
ICS Codes	21.120.30 - Keys and keyways, splines

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BS 4235-1:1972

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