1、BRITISH STANDARD BS EN 28737:1992 ISO 8737:1986 Taper pins with external thread, unhardened The European Standard EN 28737:1992 has the status of a British Standard UDC 621.886.115BSEN28737:1992 This British Standard, having been prepared under the directionof the General Mechanical Engineering Stan
2、dards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15 October 1992 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference GME/9 Draft for comment 85/73840 DC ISBN 0 580 21313 7 Cooperating organizations Th
3、e European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraa
4、d Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italian
5、o di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerlan
6、d Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN28737:1992 BSI 11-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 1 Scope and field of application 3 2 Re
7、ferences 3 3 Dimensions 4 4 Specifications and reference International Standards 5 5 Designation 5 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-reference Inside back coverBSEN28737:1992 ii BSI 11-1999 National foreword This British St
8、andard has been prepared under the direction of the General Mechanical Engineering Standards Policy Committee and is the English language version of EN28737:1992 Taper pins with external thread, unhardened, published by the European Committee for Standardization (CEN). It is identical with ISO8737:1
9、986, published by the International Organization for Standardization (ISO). EN28737:1992 was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are
10、 responsible for their 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, theEN title page, pages2to6, an inside back cover and a back cover.
11、 This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 28737 July 1992 UDC 621.886.115 Descriptors: Fasteners, locating pins, taper pin
12、s, specifications, dimensions, designation English version Taper pins with external thread, unhardened (ISO 8737:1986) Goupilles de position coniques longueur filete, non trempes (ISO 8737:1986) Kegelstifte mit Gewindezapfen, ungehrtet (ISO 8737:1986) This European Standard was approved by CEN on199
13、2-07-17. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obta
14、ined on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secr
15、etariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committe
16、e for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1992 Copyright reserved to CEN members Ref. No. EN 28737:1992 EEN28737:1992 BSI 11-1999 2 Foreword In1992, CEN Technical Committee CEN/TC185 “Threaded and non
17、threaded mechanical fasteners and accessories” the secretariat of which is held by DIN decided to submit the International Standard ISO 8737:1986 “Taper pins with external thread, unhardened” to the formal vote procedure. The result was positive. In the countries bound to implement this European Sta
18、ndard a national standard identical to this European standard shall be published at the latest by1993-01-31and conflicting national standards shall be withdrawn at the latest by1993-01-31. According to the CEN/CENELEC Common Rules the following countries are bound to implement this European Standard
19、: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Spain, Portugal, Sweden, Switzerland and UnitedKingdom.EN28737:1992 BSI 11-1999 3 1 Scope and field of application This International Standard specifies the characteristics of unh
20、ardened taper pins with external thread, and metric dimensions and nominal diameters, d 1 , from5to50 mm inclusive. 2 References ISO 965, ISO general purpose metric screw threads Tolerances. ISO 2081, Metallic coatings Electroplated coatings of zinc on iron or steel. ISO 3269, Fasteners Acceptance i
21、nspection. ISO 4520, Chromate conversion coatings on electroplated zinc and cadmium coatings. EN28737:1992 4 BSI 11-1999 3 Dimensions Dimensions in millimetres d 1 h10 b 5 6 8 10 12 16 20 25 30 40 50 a max. 2,4 3 4 4,5 5,3 6 6 7,5 9 10,5 12 b max. 15,6 20 24,5 27 30,5 39 39 45 52 65 78 min. 14 18 22
22、 24 27 35 35 40 46 58 70 d 2 M5 M6 M8 M10 M12 M16 M16 M20 M24 M30 M36 p a 0,8 1 1,25 1,5 1,75 2 2 2,5 3 3,5 4 d 3 max. 3,5 4 5,5 7 8,5 12 12 15 18 23 28 min. 3,25 3,7 5,2 6,6 8,1 11,5 11,5 14,5 17,5 22,5 27,5 z max. 1,5 1,75 2,25 2,75 3,25 4,3 4,3 5,3 6,3 7,5 9,4 min. 1,25 1,5 2 2,5 3 4 4 5 6 7 9 l
23、c nom. min. max. 40 39,5 40,5 45 44,5 45,5 50 49,5 50,5 55 54,25 55,75 Range 60 59,25 60,75 65 64,25 65,75 75 74,25 75,75 85 84,25 85,75 of 100 99,25 100,75 120 119,25 120,75 140 139,25 140,75 commercial 160 159,25 160,75 190 189,25 190,75 220 219 221 lengths 250 249 251 280 279 281 320 319 321 360
24、359 361 400 399 401 a P = thread pitch. b Other tolerances as agreed between customer and supplier. c For nominal lengths above 400 mm, steps of 40 mm.EN28737:1992 BSI 11-1999 5 4 Specifications and reference International Standards 5 Designation Example for the designation of an unhardened steel ta
25、per pin with external thread, nominal diameter d 1 =6mm and nominal length l = 50mm: Taper pin ISO 8737 6 50 St Screw thread Metric screw thread with tolerance 6g to ISO 965. Material St = Free-cutting steel, hardness 125 to 245 HV. Other materials as agreed between customer and supplier. Surface fi
26、nish Plain, i.e. pins to be supplied in natural finish, treated with rust-preventative lubricant, unless otherwise specified by agreement between customer and supplier. Preferred coatings are black oxide, phosphate coating or zinc plating with chromate conversion coating (see ISO 2081 and ISO 4520).
27、 Other coatings as agreed between customer and supplier. All tolerances shall apply prior to the application of a plating or coating. Workmanship Parts shall be uniform in quality and free of irregularities or detrimental defects. No burrs shall appear on any part of the pin. Taper The taper shall b
28、e inspected by use of an adequate optical comparator. Acceptability The acceptance procedure is covered in ISO 3269.6 blankBSEN28737:1992 BSI 11-1999 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by
29、the General Mechanical Engineering Standards Policy Committee (GME/-) to Technical Committee GME/9, upon which the following bodies were represented: BEAMA Ltd. British Constructional Steelwork Association Ltd. British Industrial Fasteners Federation British Railways Board British Steel Industry Bri
30、tish Steel Industry (Wire Section) Gauge and Tool Makers Association Ministry of Defence Society of Motor Manufacturers and Traders Ltd. Washer Manufacturers Association of Great Britain The following bodies also participated in the preparation of the standard, through subcommittees and panels: Defe
31、nce Manufacturers Association General Municipal Boilermaker and Allied Trades Union Screw Thread Tool Manufacturers Association Society of British Aerospace Companies Ltd. National annex NB (informative) Cross-reference Publication referred to Corresponding British Standard ISO 4520:1981 BS 6338:198
32、2 Specification for chromate conversion coatings on electroplated zinc and cadmium coatingsBS EN 28737:1992 ISO 8737:1986 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view o
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