1、BRITISH STANDARD BS1296-1: 1970 Specification for Single point cutting tools Part 1: Shank sectionsBS1296-1:1970 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee,was published underthe authority of the Executive Board on 10 July 1970 BSI 09-1999 Th
2、e following BSI references relate to the work on this standard: Committee references MEE/83 and MEE/150 Draft for comment 69/7359 ISBN580062112 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of
3、representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Gas Council Association of Consulting Engineers Institution of Civil Engineers Association of Mining Electrical and Institution of Gas Engineers Mechanical En
4、gineers Institution of Heating and Ventilating Board of Trade Engineers British Chemical Plant Manufacturers Institution of Mechanical Engineers Association Institution of Mechanical Engineers British Compressed Air Society (Automobile Division)* British Electrical and Allied Manufacturers Instituti
5、on of Production Engineers* Association* Locomotive and Allied Manufacturers British Gear Manufacturers Association Association of Great Britain British Internal Combustion Engine London Transport Executive Manufacturers Association Machine Tool Trades Association* British Mechanical Engineering Con
6、federation Ministry of Defence, Army Department* British Pump Manufacturers Association Ministry of Public Building and Works British Steel Industry Ministry of Technology Crown Agents for Oversea Governments and Ministry of Technology National Administrations Engineering Laboratory* Department of E
7、mployment and Productivity Ministry of Transport (H.M. Factory Inspectorate) National Coal Board Electricity Council, the Central Electricity National Physical Laboratory (Ministry of Generating Board and the Area Boards in Technology) England and Wales Royal Institute of British Architects Engineer
8、ing Equipment Users Association The Government department and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: British Hard Metal Associa
9、tion Welded Tool Manufacturers Association British Railways Board National Federation of Engineers Tool Manufacturers Amendments issued since publication Amd. No. Date CommentsBS1296-1:1970 BSI 09-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Dimensions 1
10、 3 Tolerances 1 Appendix A Non-preferred sizes of shank sections 2 Table 1 Preferred sizes 1 Table 2 Tolerances 1 Table 3 Non-preferred sizes 2BS1296-1:1970 ii BSI 09-1999 Foreword This standard makes reference to the following British Standard: BS 4500, ISO limits and fits. This Part of this Britis
11、h Standard has been prepared under the authority of the Mechanical Engineering Industry Standards Committee. It relates solely to dimensions and tolerances for shank sections for single point cutting tools, either butt welded high speed steel tools, carbide tipped turning and planing tools or tool h
12、older bits. Essentially based on ISO Recommendation R 241 1) , this Part of this standard takes account of the requirements of ISO Recommendations R 243 2)and R 514 3)and BS 4500 4) . Consideration has also been given to existing practices of British tool holder bit manufacturers, and to the require
13、ments of ancillary tool holding equipment and certain continental users. Dimensions of rectangular shapes which are also in demand are shown in Appendix A as non-preferred sizes, as these dimensions are not in the ratio of1.6:1, although, with the exception of two sizes, they also conform to dimensi
14、ons shown in ISO/R 241 1) . Part 2 of this standard will deal with nomenclature for single point cutting tools and will supersede BS 1886:1952. BS 1296:1961, which relates to butt welded single point cutting tools and blanks (imperial units), will be withdrawn in due course, and should not be used f
15、or new designs. Its place will be taken by a Part 3 of this standard, which will be in metric units. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard
16、 does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicat
17、ed in the amendment table on the inside front cover. 1) ISO/R 241, “Shanks for turning and planing tools. Sections and tolerances”. 2) ISO/R 243, “Turning tools with carbide tips. Metric series”. 3) ISO/R 514, “Turning tools with carbide tips. Internal tools. Metric series”. 4) BS 4500, “ISO limits
18、and fits.”BS1296-1:1970 BSI 09-1999 1 1 Scope This Part of this British Standard specifies dimensions and tolerances for the shank sections of single point cutting tools of the following shapes: Round. Square. Rectangular. 2 Dimensions The preferred sizes of shank sections are shown in Table 1. Non-
19、preferred sizes of rectangular sections are given in Appendix A. Table 1 Preferred sizes 3 Tolerances The tolerances for shank sections are shown in Table 2. In the case of rectangular sections, the tolerance should be the relative tolerance for the height of the section and should be applied to the
20、 height and width of the section. Table 2 Tolerances Round Square Rectangular d h b h b mm 4 5 6 8 10 12 16 20 25 32 mm 4 4 5 5 6 6 8 8 10 10 12 12 16 16 20 20 25 25 32 32 40 40 50 50 mm 6 4 8 5 10 6 12 8 16 10 20 12 25 16 32 20 40 25 50 32 Type of shank Tolerance zone a Precision ground Commerciall
21、y ground Machined Unmachined f 7 d11 h15 Normal rolling or forging tolerance (before finishing the bottom face) a BS4500, “ISO limits and fits.”BS1296-1:1970 2 BSI 09-1999 Appendix A Non-preferred sizes of shank sections The sizes of rectangular sections shown below in Table 3 are non-preferred, and
22、 are included as they are still in use. However, as they do not conform to the preferred ratio of 1.6 : 1 for height against width it is recommended that they should not be considered for new designs of equipment. The tolerances shown in Table 2 also apply to these sections. Table 3 Non-preferred si
23、zes Rectangular sections h b mm 8 6 10 4 12 10 16 6 20 16 25 20 50 40blankBS1296-1: 1970 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the
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