1、BRITISH STANDARD Grooved pins with round head The European Standard EN IS0 8746 : 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 8746 : 1998 BS EN IS0 8746 : 1998 This British Standard, having been prepared und
2、er the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 16 May 1998 Q BSI 19% ISBN O 580 29069 X National foreword This British standard is the English anguage version of EN IS0 8746 : 1997. It is identical with IS0 8746 : 1
3、997. It supersedes Bs EN 28746 : 1992 which is withdrawn. The UK participation in its preparation was entnisted by Technicai Committee FME/S, Bolts, nuts and accessories, to Subcommittee FME/9/6, General purpose fasteners and accessories, which has the responsibility to: - aid enquirers to understan
4、d the tea - present to the responsible intedonaUEumpean committee any enquiries on the interprehtion, or proposals for change, and keep the UK interests informed; - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subc
5、ommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normaiiy include an annex which lists nonnative references to international publications with their corresponding European pubiications. The British Standards which im
6、plement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled Jntemational standards Correspondence Index, or by using the Fincl facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard
7、 does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside fiont cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, page U, pages 1 to 4, an inside back cover and a back cover. Amendments issued since publica
8、tion I Te*affected Amd. No. Date I I EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM D 1b24bb Ob991b9 317 D EN IS0 8746 November 1997 ICs 21.060.50 Descriptors: see IS0 document Supersedes EN 28746: 1992 English version Grooved pins with round head (IS0 8746:1997) Clous cannels a tte ronde (IS0 87
9、46:1997) Halbrundkerbngel (IS0 8746:1997) This European Standard was approved by GEN on 23 October 1997. CEN members are bound to comply with the CEWCENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any aneration.
10、Up-to-date lists and bibliographical references concerning such national standards may be obtained on applicaiion lo lhe Central Secretarial 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 u
11、nder the responsibility of a CEN member into Rs own language and notified to the Central Secretariat has the same status as lhe official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lu
12、xembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPBEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secreariat: rue de Stassart, 36 B-1050 Brussels (0 1997 CEN All rights of exploitation in any form an
13、d by any means reserved worldwide for GEN national Members. Ref. No. EN IS0 8746:1997 E EN IS0 8746 : 1997 Foreword The text of the International Standard IS0 8746:1997 has been prepared by Technical Committee ISOTTC 2 “Fasteners“ in collaboration with Technical Committee CENEC 1 85 “Threaded and no
14、n-threaded mechanical fasteners and accessories“, the secretariat of which is held by DIN. This European Standard supersedes EN 28746:1992. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 1998
15、, 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 this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, Fran
16、ce, 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 8746: 1997 has been approved by CEN as a European Standard without any modifications. lb2Ybb ObL71
17、 T75 M EN IS0 8746 : 1997 INTERNATIONAL STANDARD IS0 8746 Second edition 1997-1 1-15 Grooved pins with round head Clous cannels tte ronde Reference number IS0 8746: 1 997( E) EN IS0 8746 : 1997 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national st
18、andards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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. International o
19、rganizations, governmental and non- governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees a
20、re circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 YO of the member bodies casting a vote. International Standard IS0 8746 was prepared by Technical Committee ISOTTC 2, Fasteners. This second edition cancels and replaces the first
21、 edition (IS0 8746:1986), which has been technically revised. Descriptors: fasteners, steel products, pins (mechanics), grooved pins, specifications, characteristics, dimensions, designation. ii Lb24bbS Ob99L73 848 9 EN IS0 8746 : 1997 Grooved pins with round head 1 scope This International Standard
22、 specifies the characteristics of round head grooved pins which have three equally spaced grooves impressed longitudinally on their exterior surface, with nominal diameter, d, from 1,4 mrn to 20 mrn inclusive. The displaced material to each side of the grooves forming an expanded diameter, 4, which
23、is larger than the nominal diameter d, 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 following standards contain provisions which, through reference in this text, constitute pro
24、visions 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 possibility of applying the most recent editions of the stand
25、ards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 3269 1988, Fasteners - Acceptance inspection. IS0 4042:-), Fasteners - Electroplated coatings. IS0 9717:1990, Phosphate conversion coatings for metals - Method of specifying requirements.
26、1) To be published. (Revision of IS0 4042:1989) 1 EN IS0 8746 : 1997 I Lb24bbS Ob99174 784 I 3 Dimensions See figure 1 and table 1. NOTE - Types A and B are left to the discretion of the supplier, or specifically ordered by the customer. 1) a= 15“to30“ 2) The grooving angle 70“ applies only to groov
27、ed pins made from steel as shown in clause 5. The grooving angle may be modified depending on resilience of material. Type A: Pin with chamfered end NOTE - For other dimensions, see type A. Type B: Pin with pilot end Figure 1 2 Lb2qbb9 Ob99175 bLO EN IS0 8746 : 1997 nom. max. min. max. min. k rnax.
28、min. r = 4 4 c I li nom. min. max. 3 2.8 3,2 4 3,7 4,3 5 4.7 5,3 6 5.7 6.3 8 7.7 8.3 10 9.7 10.3 12 11.6 12.4 16 15,6 16.4 20 19,5 20.5 25 24.5 25.5 30 29,5 30,5 35 34.5 355 40 39.5 40,5 * * tn 1,4 1,6 2 2,5 3 4 5 6 8 10 12 16 20 1,40 1,60 2,OO 2,500 3,000 40 5,O 6,O 8,OO 10.00 12,O 16,O 20.0 1,35 1
29、,55 1,95 2,425 2,925 3,9 4,9 59 7,85 9,85 11,8 15.8 19,8 2.6 3.0 3.7 4.6 5,45 7,25 9.1 10,8 14.4 16.0 19.0 25.0 32.0 2,2 2,6 3,3 4,2 4,95 6.75 8,5 10,2 13,6 14,9 17.7 23,l 30,7 0.9 1,l 1.3 1.6 1,95 2.55 3.15 3,75 5,O 7,4 8.4 10.9 13.9 0.7 0.9 1,l 1.4 1.65 2,25 2,85 3.45 46 6.5 7.5 10,O 13,O 1,4 1,6
30、1,s 2.4 23 30 4,6 5,l 7,s 8 9.5 13 16,5 0.42 0.48 0.6 0,75 0.9 1,2 1,5 1,8 2.4 3,O 3.6 4,8 6 Expanded diameter, d;“ +0.05 t0.05 O 1.5 1.7 2,15 2.7 3.2 4,251 5.25 Table 1 - Dimensions Dimensions in millimetres - 12.35 - 1) The range of commercial lengths is between the stepped lines. 21 The expanded
31、diameter d, applies only to pins made from cold-heading steel. For other materials, for example stainless steel, a reduction amount shall be subtracted from the given values and should be agreed between customer and supplier. 3) For testing 4, a GO/NO GO ring gauge should be used. 4 Application The
32、diameter of the hole into which the grooved pin is to be inserted shall be equal to the nominal diameter, d, of the mating pin and to tolerance class H11. 3 EN IS0 8746 : 1997 5 Requirements and reference International Standards See table 2. Table 2 - Requirements and reference Intemational Standard
33、s Material Grooves Surface finish Workmanship Acceptability Cold-heading steel (St), hardness 125 HV30 to 245 HV30 Other materials as agreed between customer and supplier. Form of groove at the discretion of the supplier. Plain, .e. pins to be supplied in natural finish, treated with a protective lu
34、bricant, unless otherwise specified by agreement between customer and supplier. Preferred coatings are black oxide, phosphate coating or zinc plating with chromate conversion coating (see IS0 9717 and IS0 4042). Other coatings as agreed between customer and supplier. All tolerances shall apply prior
35、 to the application of a plating or coating. Pins shall be free of irregularities or detrimental defects. The acceptance procedure is covered in IS0 3269. 6 Designation EXAMPLE A round head grooved steel pin with nominal diameter d, = 6 mrn and nominal length 1 = 30 mm is designated as follows: Groo
36、ved pin IS0 8746 - 6 x 30 - St If in special cases, one of the types, for example type A, specified in clause 3 is required this shall be given in the designation as follows: Grooved pin IS0 8746 - 6 x 30 - A - St 4 BS EN IS0 8746 : 1998 BSI 389 Chiswick High Road London w4 4AL Lb24bb Ob99177 Li73 B
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