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1、BRITISH STANDARD BS EN ISO 8748:1998 Spring-type straight pins Coiled, heavy duty The European Standard EN ISO 8748:1997 has the status of a British Standard ICS 21.060.50 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8748:1998 T
2、his British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 May 1998 BSI 05-1999 ISBN 0 580 29067 0 National foreword This British Standard is the English language version of EN I
3、SO 8748:1997. It is identical with ISO 8748:1997. It supersedes BS EN 28748:1992 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee FME/9, Bolts, nuts and accessories, to Subcommittee FME/9/6, General purpose fasteners and accessories, which has the resp
4、onsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A
5、list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding Europea
6、n publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electr
7、onic Catalogue. 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 confer immunity from legal obligations. Summary of pages This doc
8、ument comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, page ii, pages 1 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
9、in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8748:1998 BSI 05-1999i Contents Page National forewordInside front cover For
10、eword2 Forewordii Text of ISO 87481 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPIS
11、CHE NORM EN ISO 8748 November 1997 ICS 21.060Supersedes EN 28748:1992 Descriptors: See ISO document English version Spring-type straight pins Coiled, heavy duty (ISO 8748:1997) Goupilles lastiques spirales Srie paisse (ISO 8748:1997) Spiralspannstifte Schwere Ausfhrung (ISO 8748:1997) This European
12、Standard was approved by CEN on 17 October 1997. 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 concer
13、ning such national standards may be obtained 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 l
14、anguage and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Swede
15、n, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Me
16、mbers. Ref. No. EN ISO 8748:1997 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8748:1997 BSI 05-1999 2 Foreword The text of the International Standard ISO 8748:1997 has been prepared by Technical Committee ISO/TC 2 “Fasteners” in
17、collaboration with Technical Committee CEN/TC 185 “Threaded and non-threaded mechanical fasteners and accessories”, the secretariat of which is held by DIN. This European Standard supersedes EN 28748:1992. This European Standard shall be given the status of a national standard, either by publication
18、 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 CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
19、 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 ISO 8748:1997 has been approved by
20、CEN as a European Standard without any modifications. NOTENormative references to International Standards are listed in Annex ZA (normative). Contents Page Foreword2 1Scope1 2Normative reference1 3Dimensions1 4Application3 5Requirements and references International Standards3 6Designation4 Annex A (
21、informative) BibliographyInside back cover Annex ZA (normative) Normative references to international publications with their relevant European publicationsInside back cover Figure 11 Table 1 Dimensions2 Table 2 Requirements and reference International Standards3 Licensed Copy: sheffieldun sheffield
22、un, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8748:1997 ii BSI 05-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federatio
23、n of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.
24、 International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technic
25、al committees are circulated 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 ISO 8748 was prepared by Technical Committee ISO TC 2, Fasteners. This second edition cancels and repl
26、aces the first edition (ISO 8748:1987), which has been technically revised. Annex A of this International Standard is for information only. Descriptors: Fasteners, steel products, pins (mechanics), straight pins, spring pins, specifications, characteristics, dimensions, designation, heavy duty serie
27、s. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8748:1997 BSI 05-19991 1 Scope This International Standard specifies the characteristics of heavy duty coiled spring-type straight pins made of steel or of austenitic or martensitic s
28、tainless steel, with nominal diameter, d1, from 1,5 mm to 20 mm inclusive. NOTESpring-type straight pins, coiled, standard duty and spring type straight pins, coiled, light duty, are the subjects of ISO 8750 and ISO 8751 respectively. 2 Normative references The following standards contain provisions
29、 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 encouraged to investigate the possibi
30、lity of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 3269:1988, Fasteners Acceptance inspection. ISO 4042:, Fasteners Electroplated coatings1). ISO 8749:1986, Pins and grooved pins Shear
31、test. 3 Dimensions See Figure 1 and Table 1. 1) To be published. (Revision of ISO 4042:1989) Figure 1 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8748:1997 2 BSI 05-1999 Table 1 Dimensions Dimensions in millimetres nom.1,522,533,5
32、45681012141620 d1 before mounting max.1,712,212,733,253,794,305,356,408,5510,6512,7514,8516,921,0 min. 1,612,112,623,123,644,155,156,188,2510,3012,3514,4016,420,4 d2 before mounting max.1,41,92,42,93,43,94,855,857,89,7511,713,615,619,6 a=0,5 0,70,70,911,11,31,522,533,544,5 s0,170,220,280,330,390,450
33、,560,670,91,11,31,61,82,2 Minimum shear a 1,93,55,57,61013,520305384120165210340 strength, double kN b 1,452,53,85,77,61015,523416491 lc nom.min.max. 43,754,25 54,755,25 65,756,25 87,758,25 109,7510,25 1211,512,5 1413,514,5 1615,516,5 1817,518,5 2019,520,5 2221,522,5 2423,524,5 2625,526,5 2827,528,5
34、Range 3029,530,5 3231,532,5 3534,535,5of 4039,540,5 4544,545,5 5049,550,5commercial 5554,2555,75 6059,2560,75 6564,2565,75lengths 7069,2570,75 7574,2575,75 8079,2580,75 8584,2585,75 9089,2590,75 9594,2595,75 10099,25100,75 120119,25120,75 140139,25140,75 160159,25160,75 180179,25 180,75 200199,25 20
35、0,75 a Applies to steel and martensitic corrosion resistant steel products. b Applies to austenitic stainless steel products. c For nominal lengths above 200 mm, steps of 20 mm. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8748:199
36、7 BSI 05-19993 4 Application The diameter of the hole into which the spring pin is to be inserted shall be equal to the nominal diameter d1, of the mating pin and to tolerance class H12. 5 Requirements and reference International Standards See Table 2. Table 2 Requirements and reference Internationa
37、l Standards SteelAustenitic stainless steel Martensitic stainless steel StAC All pin diametersAlternative for pin diameters d1 12 mm Chemical compositions limits (check analysis) % Chemical compositions limits (check analysis) % C U 0,64C U 0,38C k 0,15C U 0,15 Mn U 0,60Mn U0,70Mn k 2,00Mn k1,00 Mat
38、erialaSi U 0,15Si U 0,20Si k 1,50Si k 1,00 CrbCr U 0,80Cr 16 to 20Cr 11,5 to 14 V U0,15Ni 6 to 12Ni k 1,00 P k 0,04P k 0,035P k 0,045P k 0,04 S k 0,05S k 0,04S k 0,03S k 0,03 Mo k 0,8 Hardened and tempered to a Vickers hardness of 420 HV30 to 545 HV30 Cold workedHardened and tempered to a Vickers ha
39、rdness of 460 HV30 to 560 HV30 Surface finish Plain, i.e. pins to be supplied in natural finish, treated with a protective lubricant, unless otherwise specified by agreement between customer and supplier. Plain, i.e. pins to be supplied in natural finish. If pins are surface coated appropriate plati
40、ng or coating processes should be employed to avoid hydrogen embrittlement. When pins are electroplated or phosphate-coated, they shall be suitably treated immediately after plating or coating to obviate detrimental hydrogen embrittlement although freedom from hydrogen embrittlement is not absolutel
41、y guaranteed (see ISO 4042). All tolerances shall apply prior to the application of a plating or coating. Workmanship Pins shall be free of irregularities or detrimental defects. No burrs shall appear on any part of the pin. Shear strength test The test shall be in accordance with ISO 8749. Acceptab
42、ilityThe acceptance procedure is covered in ISO 3269. a Other materials as agreed between customer and supplier. b Use of Cr is optional. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8748:1997 4 BSI 05-1999 6 Designation EXAMPLE 1
43、A steel spring-type straight pin, coiled, heavy duty, with nominal diameter d1 = 6 mm and nominal length l = 30 mm is designated as follows: Spring pin ISO 8748 6 30 St EXAMPLE 2 An austenitic stainless steel spring-type straight pin (A), coiled, heavy duty, with nominal diameter d1= 6 mm and nomina
44、l length l = 30 mm is designated as follows: Spring pin ISO 8748 6 30 A Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8748:1997 BSI 05-1999 Annex A (informative) Bibliography 1 ISO 8750:1997, Spring-type straight pins Coiled, standa
45、rd duty. 2 ISO 8751:1997, Spring-type straight pins Coiled, light duty. Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These norma
46、tive references 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 reference
47、s the latest edition of the publication referred to applies. PublicationYearTitleENYear ISO 87491986Pins and grooved pins Shear testEN 287491992 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 07:33:17 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8748:1998 BSI 389 Chiswick High Road L
48、ondon W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or
49、 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 products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service cal