BS 4065-1966 Specification for plain setting rings for use with internal diameter measuring machines - Inch units《内径测量机械用平面调整环 英制单位》.pdf
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1、BRITISH STANDARD BS 4065:1966 Specification for Plain setting rings for use with internal diameter measuring machines Inch unitsBS 4065:1966 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee and endorsed by the Chairman ofthe Engineering Divisional
2、Council, was published under theauthority of the General Council on 22nd September 1966 BSI 02-1999 The following BSI references relate to the work on this standard: Committee reference MEE/59 Draft for comment D64/10832 ISBN 0 580 32431 1 Co-operating organizations The Mechanical Engineering Indust
3、ry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Association of Consulting Engineers Association of Mining Elec
4、trical and Mechanical Engineers Board of Trade British Chemical Plant Manufacturers Association British Compressed Air Society British Electrical and Allied Manufacturers Association British Gear Manufacturers Association British Internal Combustion Engine Manufacturers Association British Iron and
5、Steel Federation British Mechanical Engineering Federation British Railways Board Crown Agents for Oversea Governments and Administrations Electricity Council, the Generating Board and the Area Boards in England and Wales Engineering Equipment Users Association Gas Council Institute of Marine Engine
6、ers Institution of Civil Engineers Institution of Gas Engineers Institution of Heating and Ventilating Engineers Institution of Mechanical Engineers Institution of Mechanical Engineers (Automobile Division) Institution of Production Engineers Locomotive and Allied Manufacturers Association of Great
7、Britain London Transport Board Machine Tool Trades Association Ministry of Defence, Army Department Ministry of Defence, Navy Department Ministry of Labour (H.M. Factory Inspectorate) Ministry of Power Ministry of Public Building and Works Ministry of Technology National Engineering Laboratory Minis
8、try of Transport National Coal Board National Physical Laboratory (Ministry of Technology) Radio Industry Council Royal Institute of British Architects Amendments issued since publication Amd. No. Date CommentsBS4065:1966 BSI 02-1999 i Contents Page Co-operating organizations Inside front cover Fore
9、word ii Introduction 1 1 Scope 1 2 Material and hardness 1 3 General features of design 1 4 Surface texture 2 5 Accuracy 2 6 Certificate and marking 3 Appendix A Stabilization of steel setting rings 4 Appendix B Recommended general dimensions of setting rings 4 British Standards Inside back coverBS
10、4065:1966 ii BSI 02-1999 Foreword In order to keep abreast of progress in the industries concerned, British Standards are subject to periodical review. Suggestions for improvements will be recorded and in due course brought to the notice of the committees charged with the revision of the standards t
11、o which they refer. A complete list of British Standards, numbering over4000, fully indexed and with a note of the contents of each, will be found in the British Standards Yearbook. The BS Yearbook may be consulted in many public libraries and similar institutions. This standard makes reference to t
12、he following British Standards: BS 1044, Gauge blanks. BS 1134, Centre-line average height method for the assessment of surface texture. BS 3730, Methods for the assessment of departures from roundness. This standard has been prepared under the authority of the Mechanical Engineering Industry Standa
13、rds Committee. It forms one of a series of standards, published and in course of preparation, for engineers precision tools and has been prepared with the co-operation of the manufacturers and in close collaboration with the National Physical Laboratory. It provides only for inch setting rings; simi
14、lar requirements for metric rings are given in a separate standard. Numerous types of instruments are now available for the measurement of internal diameters. They vary in design, application and accuracy of performance. Many of these instruments effect measurements by means of two-point contacts bu
15、t some use three-point contacts and indicate a derived diameter and others, notably air gauges, do not use contacts at all. The present standard covers requirements for plain rings intended for setting such instruments and suitable for use with those employing two-point or three-point measuring cont
16、acts and with those which are independent of physical contact. They are in three grades of accuracy and the standard has been based on considerations aimed at providing a series of plain setting rings that will serve for all types of internal measuring equipment whilst at the same time avoiding the
17、high costs entailed in manufacturing unnecessarily close to a specified size. 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 does not of itself con
18、fer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated
19、 in the amendment table on theinside front cover.BS4065:1966 BSI 02-1999 1 Introduction The first requirement for a setting ring is that its measuring surface is cylindrical to within close limits. The actual diameter of the ring is relatively unimportant providing its size is known, or known to be
20、within specified limits. Separate tolerances have therefore been allocated for truth of cylindrical form and for departure of diameter from nominal size; thus, Columns2 and3 of the table in5.4 give values designed to ensure that the bore of the ring is round and parallel within limits consistent wit
21、h its grade of accuracy and Column4 gives the recommended maximum departures of the mean measured diameter from the nominal size specified by the user. Although, as has already been stated, the actual diameter of the ring is less important than its geometrical form, it is nevertheless essential to k
22、now, when setting an instrument, how closely the size stated for the ring has been established and Column5 accordingly specifies the accuracy of determination appropriate to the various grades. Further, when considering the diametral tolerances for setting rings, it is important that the effect of p
23、ossible departures from ideal roundness be clearly understood. It is a well known fact that uniform diametral measurements of a cylinder, obtained by using two diametrically opposite measuring contacts, do not necessarily mean that the cylinder is truly circular in section. It may suffer from depart
24、ures from ideal roundness. Measurement of a cylinder by means of three contacts, for example, may reveal form deviations undetected when only two opposite contacts are used. In order to ensure that departures from roundness can be expressed numerically and consistently controlled and assessed, a Bri
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