BS 4372-1968 Specification for engineers steel measuring rules《工程人员用钢量尺规范》.pdf
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1、BRITISH STANDARD BS 4372:1968 Specification for Engineers steel measuring rulesBS4372:1968 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee,was published underthe authority of the Executive Board on 30December1968 BSI 08-1999 The following BSI refe
2、rences relate to the work on this standard: Committee reference MEE/59 Draft for comment 67/18560 ISBN 580 00371 X Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the foll
3、owing Government departments and scientific and industrial organizations: Associated Offices Technical Committee Association of Consulting Engineers Association of Mining Electrical and Mechanical Engineers Board of Trade British Chemical Plant Manufacturers Association British Compressed Air Societ
4、y British Electrical and Allied Manufacturers Association British Gear Manufacturers Association British Internal Combustion Engine Manufacturers Association British Mechanical Engineering Federation British Pump Manufacturers Association British Steel Industry Crown Agents for Oversea Governments a
5、nd Administrations Electricity Council, the Central Electricity Generating Board and the Area Boards in England andWales Engineering Equipment Users Association Gas Council Institute of Marine Engineers Institution of Civil Engineers Institution of Gas Engineers Institution of Heating and Ventilatin
6、g Engineers Institution of Mechanical Engineers Institution of Mechanical Engineers (Automobile Division) Institution of Production Engineers Locomotive and Allied Manufacturers Association of Great Britain London Transport Board Machine Tool Trades Association Ministry of Defence, Army Department M
7、inistry of Labour (H.M. Factory Inspectorate) Ministry of Power Ministry of Technology Ministry of Public Building and Works Ministry of Technology National Engineering Laboratory Ministry of Transport National Coal Board National Physical Laboratory (Ministry of Technology) Radio Industry Council R
8、oyal Institute of British Architects Amendments issued since publication Amd. No. Date CommentsBS4372:1968 BSI 08-1999 i Contents Page Co-operating organizations Insidefrontcover Foreword ii 1 General 1 1.1 Scope 1 1.2 Definitions 1 1.3 Marking 1 2 Steel rules 1 2.1 Material and finish 1 2.2 Recomme
9、nded lengths 2 2.3 Suggested sections 2 2.4 Graduation lines and figuring 2 2.5 Accuracy 2 3 Folding steel rules 3 3.1 Construction 3 3.2 Material and finish 3 3.3 Suggested sections 3 3.4 Graduation lines and figuring 4 3.5 Accuracy 4 Figure 1 to Figure 5 Typical examples of rules complying with th
10、e standard 5 Figure 6 to Figure 9 Examples of simplified scales suggested for the future 7 Table 1 Suggested sections for steel rules 2 Table 2 Accuracy of graduation 3 Table 3 Suggested sections for folding steel rules 3BS4372:1968 ii BSI 08-1999 Foreword This standard makes reference to the follow
11、ing British Standards: BS 427, Method for Vickers hardness test Part 1. Testing of metals. BS 970, Wrought steels in the form of bars, billets and forgings, up to6 in ruling section, for automobile and general engineering purposes. En series. BS 1134, Centre-line-average height method for the assess
12、ment of surface texture. BS 1224, Electroplated coatings of nickel and chromium. This British Standard has been prepared to meet the demand for a specification for steel rules in metric units for use in engineering. In recognition of the fact that the metre and the millimetre are recommended SI unit
13、s, it is officially recommended that the figuring on the rules covered by this standard be in millimetres wherever possible. However, in those cases where practical considerations make it preferable to use centimetre figuring this is permissible as a second choice. Typical rules complying with the s
14、tandard are illustrated. Recommendations for preferred lengths are included and are based on the known demands of countries already using the metric system. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their
15、 correct application. Compliance with a British Standard 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, pages 1 to 7 and a back cover. This standard has been updated (see copyright date) and ma
16、y have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.BS4372:1968 BSI 08-1999 1 1 General 1.1 Scope This British Standard specifies requirements for steel rules of up to1 metre nominal length, for use in engineering. The standard comprises three s
17、ections as follows: Section 1: General; Section 2: Steel rules; Section 3: Folding steel rules. NOTEInch/metric rules are not included in this standard but it is recognized that they will continue in use for some time to come; the general requirements for these rules and for the metric graduation on
18、 them are in accordance with the provisions of this standard and the inch graduation should be of comparable accuracy. 1.2 Definitions For the purposes of this British Standard, the following definitions apply: steel rule a graduated continuous length of steel with one or two square datum ends foldi
19、ng steel rule two or more graduated lengths of steel connected together by swivel joints, with two square datum ends 1.3 Marking The rule shall be marked with at least the manufacturers name or trade mark and the number of this British Standard, i.e.BS4372. NOTEThe mark BS4372 on or in relation to t
20、he product is a claim by the manufacturer that it complies with the requirements of the standard. The British Standards Institution is the owner of a registered certification trade mark. This is shown below, enclosed in the words “Approved to British Standard”. This mark can be used only by the manu
21、facturers licensed under the certification mark scheme operated by the BSI. The presence of this mark on or in relation to a product is an assurance that the goods have been produced to comply with the requirements of the British Standard under a system of supervision, control and testing operated d
22、uring manufacture and including periodical inspection at the manufacturers works in accordance with the certification mark scheme of the BSI. Further particulars of the terms of licence may be obtained from the Director, British Standards Institution,2 Park Street, London,W.1. 2 Steel rules 2.1 Mate
23、rial and finish 2.1.1 Steel rules shall be manufactured in one continuous length from carbon steel, carbon steel matt chrome plated in accordance with BS1224 1)or rust-resisting steel. The steel shall be hardened and tempered and shall have a hardness of450 to550HV 2) . 1) BS1224, “Electroplated coa
24、tings of nickel and chromium”. 2) BS427, “Method for Vickers hardness test”, Part1, “Testing of metals”.BS4372:1968 2 BSI 08-1999 2.1.2 Suitable rust-resisting steels are En56C and En56D to BS970 3) . The faces and edges of the rules shall have a clean but not highly reflective finish. The surface r
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