1、BRITISH STANDARD BS EN 28736:1992 ISO8736:1986 Taper pins with internal thread, unhardened The European Standard EN28736:1992 has the status of a BritishStandardBSEN28736:1992 This BritishStandard, having been prepared under the directionof the General Mechanical Engineering Standards Policy Committ
2、ee, waspublished under the authorityof the Standards Boardand comes into effect on 15 October1992 BSI12-1999 The following BSI references relate to the work on this standard: Committee reference GME/9 Draft for comment85/73840DC ISBN 0 580 21315 3 Cooperating organizations The European Committee for
3、 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 Standardiseringsraad Finland Suomen Standar
4、disoimisliito, 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 Italiano di Unificazione Luxemb
5、ourg 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 Switzerland Association suisse de
6、normalisation United Kingdom BritishStandards Institution Amendments issued since publication Amd. No. Date CommentsBSEN28736:1992 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 1 Scope and field of application 3 2 References 3 3 Dimensions 4
7、 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 coverBSEN28736:1992 ii BSI 12-1999 National foreword This BritishStandard has been prepared u
8、nder the direction of the General Mechanical Engineering Standards Policy Committee and is the English language version of EN28736:1992 Taper pins with internal thread, unhardened, published by the European Committee for Standardization (CEN). It is identical with ISO8736:1986, published by the Inte
9、rnational Organization for Standardization (ISO). EN28736:1992 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 responsible for their cor
10、rect 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, pagesi andii, theEN title page, pages2 to6, an inside back cover and a back cover. This standard has been upd
11、ated (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 EN28736 July1992 UDC621.886.115 Descriptors: Fasteners, locating pins, taper pins, specifications, dimensions,
12、 designation English version Taper pins with internal thread, unhardened (ISO8736:1986) Goupilles de position coniques trou taraud, non trempes (ISO8736:1986) Kegelstifte mit Innengewinde, ungehrtet (ISO8736:1986) This European Standard was approved by CEN on1992-07-17. CEN members are bound to comp
13、ly 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 obtained on application to the Central Sec
14、retariat 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 Secretariat has the same status as the off
15、icial 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 Committee for Standardization Comit Europen de
16、 Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1992 Copyright reserved to CEN members Ref.No.EN28736:1992EEN28736:1992 BSI 12-1999 2 Foreword In1992, CEN Technical Committee CEN/TC185 “Threaded and non threaded mechanical fasteners and accessor
17、ies” the secretariat of which is held by DIN decided to submit the International Standard ISO8736:1986 “Taper pins with internal thread, unhardened” to the formal vote procedure. The result was positive. In the countries bound to implement this EuropeanStandard a national standard identical to this
18、European Standard shall be published at the latest by1993-01-31 and 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 EuropeanStandard: Austria, Belgium, Denmark, Finland, France
19、, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Spain, Portugal, Sweden, Switzerland and UnitedKingdom.EN28736:1992 BSI 12-1999 3 1 Scope and field of application This International Standard specifies the characteristics of unhardened taper pins with internal thread, and
20、 metric dimensions and nominal diameters, d 1 , from6 to50mm inclusive. 2 References ISO965, ISO general purpose metric screw threads Tolerances. ISO2081, Metallic coatings Electroplated coatings of zinc on iron or steel. ISO3269, Fasteners Acceptance inspection. ISO4520, Chromate conversion coating
21、s on electroplated zinc and cadmium coatings. EN28736:1992 4 BSI 12-1999 3 Dimensions Type A (ground pins): Surface finish R a =0,84m Type B (turned pins): Surface finish R a =3,24m Dimensions in millimetres d 1 h10 a 6 8 10 12 16 20 25 30 40 50 a 0,8 1 1,2 1,6 2 2,5 3 4 5 6,3 d 2 M4 M5 M6 M8 M10 M1
22、2 M16 M20 M20 M24 P b 0,7 0,8 1 1,25 1,5 1,75 2 2,5 2,5 3 d 3 4,3 5,3 6,4 8,4 10,5 13 17 21 21 25 t 1 6 8 10 12 16 18 24 30 30 36 t 2 min. 10 12 16 20 25 28 35 40 40 50 t 3 1 1,2 1,2 1,2 1,5 1,5 2 2 2,5 2,5 l c nom. min. max. 16 15,5 16,5 18 20 17,5 19,5 18,5 20,5 22 24 21,5 23,5 22,5 24,5 26 25,5 2
23、6,5 28 27,5 28,5 30 29,5 30,5 Range 32 31,5 32,5 35 34,5 35,5 40 45 39,5 44,5 40,5 45,5 50 55 49,5 54,25 50,5 55,75 of 60 59,25 60,75 65 64,25 65,75 70 69,25 70,75 commercial 75 74,25 75,75 80 85 90 79,25 84,25 89,25 80,75 85,75 90,75 95 100 120 94,25 95,75 99,25 119,25 100,75 120,75 lengths 140 160
24、 139,25 159,25 140,75 160,75 180 200 179,25 199,25 180,75 200,75 a Other tolerances, for example a11, c11, f8, as agreed between customer and supplier. b P =thread pitch. c For nominal lengths above200mm, steps of20mm.EN28736:1992 BSI 12-1999 5 4 Specifications and reference International Standards
25、5 Designation Example for the designation of an unhardened steel taper pin, type A, with internal thread, nominal diameter d 1 =6mm and nominal lengthl =30mm: Taper pin ISO8736 A6 30St Screw thread Metric screw thread with tolerance6H to ISO965. Material St=Free-cutting steel, hardness125 to245HV. O
26、ther materials as agreed between customer and supplier. Plain, i.e.pins to be supplied in natural finish, treated with rust-preventative lubricant, unless otherwise specified by agreement between customer and supplier. Surface finish Preferred coatings are black oxide, phosphate coating or zinc plat
27、ing with chromate conversion coating (see ISO2081 and ISO4520). 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 bur
28、rs shall appear on any part of the pin. Taper The taper shall be inspected by use of an adequate optical comparator. Acceptability The acceptance procedure is covered in ISO3269.6 blankBSEN28736:1992 BSI 12-1999 National annex NA (informative) Committees responsible The United Kingdom participation
29、in the preparation of this European Standard was entrusted by 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 Fastener
30、s Federation British Railways Board British Steel Industry British 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 prepa
31、ration of the standard, through subcommittees and panels: Defence 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 referr
32、ed to Corresponding British Standard ISO4520:1981 BS6338:1982 Specification for chromate conversion coatings on electroplated zinc and cadmium coatingsBS EN 28736:1992 ISO8736:1986 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsibl
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