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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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. Turned And Machined Parts or quote. The Catalogue may be consulted in ns4235 public libraries and similar institutions. In cases such as stepped shafts when larger diameters are partt, 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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The dimensions and tolerances above and inTable 8 have been determined so that this is possible in all cases. This is considered necessary to avoid the possibility of the rotation of the key which might occur in high torque, in reversing conditions, in applications where torsional vibration exists, or in precision applications.
Search all products by. Click to learn more. This standard has been updated see copyright date and may have had amendments incorporated. The use of larger key sections which are special to any particular application is outside the scope of this standard. Keysteel Stainless Steel Zinc Plated. The faster, easier way to work with standards. You may find similar items within these categories by selecting from the choices below:.
Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. For an account or quote Login to view prices. Revisions British Standards are updated by amendment or revision.
This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Contact the Information Centre. Copyright Copyright subsists in all BSI publications. Recommended standard lengths are given in Table 9. Find Similar Items This product falls into the following categories.
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Parallel Metric Keys and Keyway Dimensions
The dimensions and tolerances of interference fit keys shall be given in Table 10 and Table Keybar to the tolerances on width b and thickness h specified for the finished keys will not necessarily be commercially available. Shopping Cart and Categories navigation. The values in bold type are those which correspond most nearly with the preferred lengths given inTables 9 and 10 of BS Reconsider Cookies You have declined cookies.
This will bss4235 indicated in the amendment table on theinside front cover. Also stocked in various grades of stainless steel to include A2 and A4. Worldwide Standards We can source any standard from anywhere in the world.
Please download Chrome or Firefox or view our browser tips. Compliance with a British Standard does not of itself confer immunity from legal obligations. These metric sections of keys have been in satisfactory partt in most European countries for many years. So please help us by uploading 1 new document or like us to download: Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards.
For a worn keyway shaft use our well stocked Interference fit range. Standard mm Lengths, supplied in Metric and Imperial.
BS 4235-1-1972 Specification for Metric Keys and Keyways. Parallel and Taper Keys
In cases such a 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 pzrt key in shaft with relation to the hub results.
For an account call 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.
It is incorporated by Royal Charter. The results of these investigations parh been published and they demonstrate the effects of both static and dynamic tests, and include comparisons of the stresses and deformations of the two key forms at very high loadings. BSISO limits and fits. This standard makes reference to the following British Standards: