Buy BS Specification For Metric Keys And Keyways – Part 1: Parallel And Taper Keys from SAI Global. BS Specification For Metric Keys And Keyways – Part 1: Parallel And Taper Keys. Metric BS Part 1 and DIN; Imperial BS46 Part 1 Standard Keysteel stock materials. Keysteel M40 (EN8). Werkstoff C45 +C. Werkstoff.

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Learn more about the cookies we use and how to change your settings. Also stocked in various grades of stainless steel to include A2 and A4. Size px x x x x Login to view prices. Suggestions for improvements will be recorded and in due course brought to the notice of the committees charged with the revision of the standards to which they refer. The marked difference in dimensions between the inch and metric keys and keyways was, in the early days of metrication, ba4235 subject of considerable discussion and, quite naturally, fears were expressed that there would be problems due to the loading on the side faces of the key and keyway for any given shaft size.

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The values in bold type are those which correspond most nearly with the preferred lengths given inTables 9 and 10 of BS This will be indicated in the amendment table on theinside front cover. Click to learn more. Shopping Cart and Categories navigation. In addition, a fourth class of fit is provided in this British Standard to give an interference fit.


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The dimensions and tolerances of interference fit keys shall be given in Table 10 and Table This British Standard is the first of a series for metric keys and keyways and has been prepared under the authority of the Mechanical Engineering Industry Standards Committee. In cases such as stepped shafts when larger diameters are required, for example to resist bending, and when fans, gears and impellers are fitted with a smaller key than normal, an unequal disposition of key in shaft with relation to the hub results.

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BS 4235-1-1972 Specification for Metric Keys and Keyways. Parallel and Taper Keys

This standard has been updated see copyright date and may have had amendments incorporated. BSISO limits and fits. General principles of presentation Basic conventions for lines. We are a sharing community. oart


BS 4235-1:1972

The use of smaller key sections is permitted if suitable for the torque transmitted. Standard square profile range for Keysteel. Carbon and carbon manganese steels, including free cutting steels.

The above reports are bs423 from the Reports Unit, National Engineering Laboratory, East Kilbride, Glasgow, to which enquirers should apply direct. BSWrought steels in the form of blooms, billets, bars and forgings. It is the constant aim of BSI to improve the quality of our products and services.

BS – Specification for metric keys and keyways. Parallel and taper keys

Accept and continue Learn more about the cookies we use and how to change your settings. In addition to the three classes of fit agreed byISO as mentioned above, the United Kingdom has found it necessary to introduce an additional class, an interference fit. You may experience issues viewing this site in Internet Explorer 9, 10 or It was, however, still desirable that there should be the satisfaction of more positive assurance that no design limitation exists in the application of the thinner metric key sections.

The use of larger key sections is not permitted.

So please help us by uploading 1 new document or pary us to download: The dimensions and tolerances above and inTable 8 have been determined so that this is possible in all cases. Bss4235 and Taper Keys”. NOTE 2The assembly of a taper key requires that the taper of the key be fitted to the keyway. The use of larger key sections which are special to any particular application is outside the scope of this standard.