1、BRITISH STANDARD The European Standard EN IS0 8742 : 1997 has the status of a British Standard ICs 21.060.50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN IS0 8742 : 1998 Grooved pins - One-third-length centre grooved STD.BSI BS EN IS0 8742-ENGL 1778 Lb24bb9 0698710 16
2、2 9 BS EN IS0 8742 : 1998 National foreword This British standard is the English language version of EN Is0 8742 : 1997. It is identid with Is0 8742 : 1997. It supersedes BS EN 28742 : 1992 which is withdrawn. The UKpartkipation in its preparation was entmstecl by Technid Committee FMI%, Bolts, nuts
3、 and accessoneS, to Subcommittee FME39/6, Generai purpose fastenem and accessories, which has the responsibility to: - aid enquirers to understand the tea - present to the responsible intemational/Empean committee any enquiries on the inteqretation, or proposals for change, and keep the UK interests
4、 iIlfOrII-l* - monitor reW intedonai and European developments and promuigate them in the UK. A iist of organizationS represented on this subcommittee can be obtained on request to its sectary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex w
5、hich iists nonnative references to intemationai publications with their corresponding European pubications. The British Standards which implement intedonal or European publications referred to in this document may be found in the BSI Standards catalogue under the section entitied ntematiod Standards
6、 Correspondence Index, or by using the Fnd faciity of the BSI standards Eledronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legai obigations. Summary of pages This document comprises a fmnt cover, an inside fmnt cover, the EN Is0 title page, the EN Is0 for
7、eword page, the Is0 Me page, page ii, pages 1 to 3, the annex ZA page, an inside back cover and a back cover. ThisBritishstandard,having been prepared under the direction of the Engineering Sect.orBoard,waspublished undex the authority of the Standards Board and comes into effecton 16 May 1998 Amend
8、ments issued since pubication Amd No. 1Dat.e ITextaffected O BSI 1998 STD.BSI BS EN IS0 8742-ENGL 1778 Lb24bb7 Ob78733 UT7 = EUROPEANSTANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 8742 November 1997 ICs 21 .o60 DescrippOrs: see IS0 document Supetsedes EN 28742:1992 English version Grooved pins - On
9、e-third-length centre grooved (IS0 8742: 1 997) GaupYba cannelen cwneiums centrdee amilanle8 sur le lbrs de Ia longueur non dabouchanlos (IS0 8742:l-q This European Slawlard was approved by CEN on 18 October 1897. CEN members am bound to comply with lhe CEWCENELEC Internal RegtdalioM which dtlpuiaio
10、 the condlbns for dving this European Standard lhe slalus of a nalional siandard without any alterabion. Up-lwhte lists and MMiographical rehmcea concerning such natknd slandards may be oblained on appcalion lo lhe Cemral Secretarial or lo any CEN member. This European stsndird exMa in three ollidal
11、 veIPkn8 (English, Flendi, Qerman). A vomkm in any other language made by translation under the responsilty af a CEN member inlo its own language and noafied 10 the centrai Secretarial has the same 6talus as lhe official verBim. CEN members am the national slandards bodies af Austria, Belgium, Czedi
12、 Republic, Denmark, Finland, France, Qermany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spin, Sweden, Switzerland and UniIod Kingdom. EiJROPEAN COMMEE FDR STANDARDEATION COMITfi EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FOR NORMUNG Q 1997 CEN Ail righls of expbi
13、talbn in any form and by any means reserved worldwide for CEN nalbnal Members. Ref. No. EN IS0 8742:1997 E - STD.BSI BS EN IS0 87q2-ENGL 1778 m lb24bb9 Ob78712 T35 m EN Is0 8742 : 1997 Foreword The text of the International Standard IS0 8742:1997 has been prepared by Technical Committee ISOTTC 2 “Fa
14、steners“ in collaboration with Technical Committee CENTTC 185 “Threaded and non-threaded mechanical fasteners and accessories“, the secretariat of which is held by DIN. This European Standard supersedes EN 28742:1992. This European Standard shall be given the status of a national standard, either by
15、 publication of an identical text or by endorsement, at the latest by May 1998, and conflicting national standards shall be withdrawn at the latest by May 1998. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement th
16、is European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 8742:1997 was approv
17、ed by CEN as a European Standard without any modification. . NOTE: Normative references to International Standards are listed in annex ZA (normative). STD-BSI BS EN IS0 8742-ENGL 1998 = lbZqbb9 Ob98713 971 = EN IS0 8742 : 1997 INTERNATIONAL STANDARD IS0 8742 Second edition 1 997- 1 1 -01 Grooved pin
18、s - One-third-length centre grooved Goupilles canneles cannelures centrales constantes sur le tiers de la longueur non dbouchantes Reference number IS0 8742: 1997( E) STD-BSI BS EN IS0 8742-ENGL 1998 lb24bb7 Ob98711i 808 EN IS0 8742 : 1997 Foreword IS0 (the International Organization for Standardiza
19、tion) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried oui through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be
20、represented on that committee. International organizations, governmental and non- governmental, in liaison with ISO, also take par! in the work. IS0 collaborates closely with the Intemational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International St
21、andards adopted by the technical committees are cirulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 8742 was prepared by Technical Committee ISOTC 2, astenets. This seco
22、nd edition cancels and replaces the first edition (IS0 8742:1986), which has been technically revised. D#wlpton: fastenem, steel products, pins (mechanics), grooved pins, specHicaons, chamcteristics. dimensions, designation. ii 3 v) * EN IS0 8742 : 1997 Grooved pins - One-third-length centre grooved
23、 1 scope This International Standard specifies the characteristics of one-third-length centre grooved pins made of steel or austenitic stainless steel which have three equally spaced grooves impressed longitudinally on their exterior surface, with nominal diameter, dl, from 1,5 mm to 25 mm inclusive
24、. The displaced material to each side of the grooves forming an expanded diameter, 4, which is larger than the nominal diameter dl will cause a non-positive locking fit when these grooved pins are forced into a drilled hole equal to the nominal diameter d, (see clause 4). 2 Normative references The
25、following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are
26、 encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 .maintain registers of currently valid International Standards. IS0 3269: 1988, Fasteners - Acceptance inspection. IS0 3506-1:1997. Corrosion-resistant stainless s
27、teel fasteners - Part 1: Bolts, screws and studs. IS0 4042:-“, Fasteners - Electroplated coatings. IS0 87491986, Pins and grooved pins - Shear test. IS0 9717:1990, Phosphate conversion coatings for metals - Method of specifying requirements. 3 Dimensions See figure 1 and table 1. 4 I 1) Chamfer perm
28、issible 2) The grooving angle 70“ applies only to grooved pins made from steel as shown in clause 5. The grooving angle may be modified depending on resilience of material Figure 1 1) To be published. (Revision of IS0 4042:1989) 1 EN IS0 8742 : 1997 Tab 1 - Dimensions Dimensions in millimetres I 1 -
29、 16.25 - 163 - 16,4 - 16,5 - +O. 1 20.3 - 20,4 - 20.5 - - 25.25 25,3 - 25,4 - 25,5 - 1) Applies only to grooved pins made from steel as shown in clause 5. 2) The range of commercial lengths is between the stepped lines. 3) The expaned diameter 4 applies only to pins made from steel as shown in claus
30、e 5. For other materials, for ex- ampie stainless steel, a reductlon amount shall be subtracted from the given values and should be agreed between customer 8nd eupplisr. 4) For testing 4 a GOMO GO ring gauge should be used. 2 STD-BSI BS EN IS0 7Li2-ENGL 1998 W Lb2qbbS ObS7L7 527 m EN IS0 8742 : 1997
31、 Hardness 125 HV30 to 245 HV30 4 Application Al in accordance with IS0 3506-1, hardness 210 HV30 to 280 HV30 The diameter of the hole into which the groove pin is to be inserted shall be equal to the nominal diameter d, of the mating pin and to tolerance class H11. 5 Requirements and reference Inter
32、national Standards See table 2. Table 2 - Requirements and reference Intemational Standards I Austenitic stainless steel Steel (St) Grooves Surface finish Workmanship Shear strength test Acceptability Plain, .e. pins to be supplied in natural finish treated with a protective lubricant, unless otherw
33、ise specified by agreement between customer and supplier. Preferred coatings are black oxide, phosphate coating or zinc plating with chromate conver- sion coating (see IS0 9717 and IS0 4042). Other coatings as agreed between customer and supplier. All tolerances shall apply prior to the appli- catio
34、n of a plating or coating. Plain, .e. pins to be supplied in natural finish. Pins shall be free of irregularities or detrimental defects. The test shall be in accordance with IS0 8749. The acceptance procedure is covered in IS0 3269. 1) Other materials as agreed between customer and supplier. 6 Desi
35、gnation EXAMPLE 1 A one-third-length centre grooved steel pin with nominal diameter d, = 6 mm and nominal length I = 50 mm is designated as follows: Grooved pin IS0 8742 - 6 x 50 - St EXAMPLE 2 A one-third-length centre grooved austenitic stainless steel pin of grade Al, with nominal diameter d, = 6
36、 mm and nominal length i = 50 mm is designated as follows: Grooved pin IS0 8742 - 6 x 50 - Al 3 STDDBSI BS EN IS0 8742-ENGL 1998 = Lb24bb9 Ob78718 i53 = EN IS0 8742 : 1997 This European Standard incorporates by dated or undated reference, provisions from other publications. These normative reference
37、s cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest e
38、dition of the publication referred to applies. publication N XQaL IS0 8749 1986 Pins and grooved pins - Shear test EN 20749 1992 STD-BSI BS EN IS0 8742-ENGL 1778 lb24bb7 Ob78717 39T BS EN IS0 8742 : 1998 BSI 389ChiswickHighRoad London w4 4AL BSI - British Standards Institution BSI is the independent
39、 national body responsible for prem British Stan- It presents the UK view on standanis in Europe and at the international leveL It is incorporated by Royal Charter. Contract requirements A British Standard does not putport to include ali the necessary provisions of a contract Usem of British Standar
40、ds are responsible for their correct application. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our produds and services. We wo
41、uld be grateful if anyone finding an inaccuracy or ambiguity while using this British standard would inform the secretary of the responsible technical committee, the identity of which can be found on the inside front cover. Tel: 0181 996 9ooo; Fa 0181 996 7400. BSI offers members an individuai updat
42、ing service ded PLUS which ensures that subscribers automaticaily receive the latest editions of standards. Buying standards orders for ali BSI, international and foreign standards pubiications should be addressed to Customer Services, Mes Deparianent at Chiswick Tel: 0181 996 7000, Fax: 0181 996 70
43、01. In response to ordem for internationai standards, it is BSI policy to supply the BSI implementation of those that have been published as British Stan-, unes otherwise requesid. Information on standards BSI provides a wide range of infomation on national, European and international standmis throu
44、gh its Library, the Standardiine Database, the BSI Jnfomation Technology Service (BllS) and its Technical Help to Exporters Service. Contact the Information Department at Chiswick Tel: 0181 996 7111; Fax 0181 996 7048. Subscribii members of BSI are kept up to date with sandards developments and rece
45、ive SUbBtantjal discounts on the purchase price of stanards. For details of these and other benefits contact Customer Services, Membership at Chiswick Tel: 0181 996 7002; Fax 0181 996 7001. COPyilght Copyright subsids in all BSI pubiications. BSI also holds the copyright, in the UK, of the pubiicati
46、ons of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, storedinarelrievaisystemortmmued in any form or by any means - elanic, photocopying, recoring or otherwise -without prior written pesmisSion from BSL T
47、his does not preclude the free use, in the com of implementing the sandard, of necessary details such as symbols, and size, type or grade designations. If these details are to be used for any other purpose than implementation then the prior wriaen permission of BSI must be obtained. If pennission is granted, the terms may include royalty payments or a iicensing agreement. Details and avice can be obtained hm the Copyright Manager, BSI, 389 Chiswick High Road, London W4 4AL
