1、July 2007DEUTSCHE NORM English price group 7No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 21.060.50!,z2“9871588www.d
2、in.deDDIN EN ISO 8751Spring-type straight pins Coiled, light duty (ISO 8751:2007)English version of DIN EN ISO 8751:2007-07Spiralspannstifte Leichte Ausfhrung (ISO 8751:2007)Englische Fassung DIN EN ISO 8751:2007-07SupersedesDIN EN ISO 8751:1998-03www.beuth.deDocument comprises 9 pages09.07DIN EN IS
3、O 8751:2007-07 2 National foreword This standard has been prepared by Technical Committee ISO/TC 2 “Fasteners” in collaboration with Technical Committee CEN/TC 185 “Fasteners” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Mechanische Ver
4、bindungselemente (Fasteners Standards Committee), Technical Committee NA 067-04-01 AA Stifte und Bolzen. The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: ISO 286-2 DIN ISO 286-2 ISO 3269 DIN EN ISO 3269 ISO 4042 DIN EN ISO 4042 ISO 8749
5、 DIN EN 28749 ISO 6507-1 DIN EN ISO 6507-1 Amendments This standard differs from DIN EN ISO 8751:1998-03 as follows: a) Hardness testing as in DIN EN ISO 6507-1 has been included. b) The standard has been editorially revised. Previous editions DIN EN 28751: 1992-10 DIN EN ISO 8751: 1998-03 Product p
6、roperties The product properties of spring-type straight pins as specified in this standard are given in DIN 4000-163. National Annex NA (informative) Bibliography DIN 4000-163, Tabular layout of product properties Part 163: Fasteners without thread DIN EN 28749, Determination of shear strength of p
7、ins DIN EN ISO 3269, Fasteners Acceptance inspection DIN EN ISO 4042, Fasteners Electroplated coatings DIN EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method DIN ISO 286-2, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit deviations for hol
8、es and shafts EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8751April 2007ICS 21.060.50 Supersedes EN ISO 8751:1997 English VersionSpring-type straight pins - Coiled, light duty (ISO 8751:2007)Spiralspannstifte - Leichte Ausfhrung (ISO 8751:2007)This European Standard was approved by CEN on
9、22 March 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be o
10、btained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Manag
11、ement Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway
12、, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and b
13、y any means reservedworldwide for CEN national Members.Ref. No. EN ISO 8751:2007: E(ISO 8751:2007)Goupilles lastiques spirales - Srie minceEN ISO 8751:2007 (E) Foreword This document (EN ISO 8751:2007) has been prepared by Technical Committee ISO/TC 2 “Fasteners” in collaboration with Technical Comm
14、ittee CEN/TC 185 “Fasteners”, the secretariat of which is held by DIN. 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 October 2007, and conflicting national standards shall be withdrawn at the la
15、test by October 2007. This document supersedes EN ISO 8751:1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Fin
16、land, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 8751:2007 has been approved by CEN as EN ISO 87
17、51:2007 without any modifications. 2 1 Scope This International Standard specifies the characteristics of coiled light duty spring-type straight pins made of steel or of austenitic or martensitic stainless steel, with a nominal diameter, d1, from 1,5 mm to 8 mm inclusive. NOTE Spring-type straight p
18、ins, coiled, heavy duty, and spring type straight pins, coiled, standard duty, are the subjects of ISO 8748 and ISO 8750, respectively. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited appli
19、es. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 286-2, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts ISO 3269, Fasteners Acceptance inspection ISO 4042, Fasteners E
20、lectroplated coatings ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method ISO 8749, Pins and grooved pins Shear test 3 Dimensions See Figure 1 and Table 1. aSwaged chamfer at both ends. Figure 1 EN ISO 8751:2007 (E) 3 Table 1 Dimensions Dimensions in millimetres nom. 1,5 2 2,5 3
21、 3,5 4 5 6 8 max. 1,75 2,28 2,82 3,35 3,87 4,45 5,5 6,55 8,65 d1before mounting min. 1,62 2,13 2,65 3,15 3,67 4,20 5,2 6,25 8,30 d2before mounting max. 1,4 1,9 2,4 2,9 3,4 3,9 4,85 5,85 7,8 a 0,5 0,7 0,7 0,9 1 1,1 1,3 1,5 2 s 0,08 0,11 0,14 0,17 0,19 0,22 0,28 0,33 0,45 a 0,8 1,5 2,3 3,3 4,5 5,7 9 1
22、3 23 Minimum shear strength, double, kN b 0,65 1,1 1,8 2,5 3,4 4,4 7 10 18 l cnom. min. max. 4 3,75 4,25 5 4,75 5,25 6 5,75 6,25 8 7,75 8,25 10 9,75 10,25 12 11,5 12,5 14 13,5 14,5 16 15,5 16,5 Range 18 17,5 18,5 20 19,5 20,5 22 21,5 22,5 of 24 23,5 24,5 26 25,5 26,5 28 27,5 28,5 commercial 30 29,5
23、30,5 32 31,5 32,5 35 34,5 35,5 lengths 40 39,5 40,5 45 44,5 45,5 50 49,5 50,5 55 54,25 55,75 60 59,25 60,75 65 64,25 65,75 70 69,25 70,75 75 74,25 75,75 80 79,25 80,75 85 84,25 85,75 90 89,25 90,75 95 94,25 95,75 100 99,25 100,75 120 119,25 120,75 aApplies to steel and martensitic corrosion resistan
24、t steel products. bApplies to austenitic stainless steel products. cFor nominal lengths above 120 mm, steps of 20 mm. 4 EN ISO 8751:2007 (E) 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 toleran
25、ce class H12 in accordance with ISO 286-2. 5 Requirements and reference International Standards See Table 2. Table 2 Requirements and reference International Standards Steel Austenitic stainless steel Martensitic stainless steel St A C All pin diameters Alternative for pin diameters d1 12 mm Chemica
26、l composition limits (chemical analysis) % Chemical composition limits (chemical analysis) % C W 0,64 Mn W 0,60 Si W 0,15 CrbP u 0,04 S u 0,05 C W 0,38 Mn W 0,70 Si W 0,20 Cr W 0,80 V W 0,15 P u 0,035 S u 0,04 C u 0,15 Mn u 2,00 Si u 1,50 Cr 16 to 20 Ni 6 to 12 P u 0,045 S u 0,03 Mo u 0,8 C W 0,15 M
27、n u 1,00 Si u 1,00 Cr 11,5 to 14 Ni u 1,00 P u 0,04 S u 0,03 Hardened and tempered to a Vickers hardness of 420 HV to 545 HV Cold worked Hardened and tempered to a Vickers hardness of 460 HV to 560 HV MaterialaHardness testing according to ISO 6507-1. Hardness testing according to ISO 6507-1. Plain,
28、 i.e. pins to be supplied in natural finish, treated with a protective lubricant, unless otherwise specified by agreement between customer and supplier. If pins are surface coated, appropriate plating or coating processes should be employed to avoid hydrogen embrittlement. Due to the risk of hydroge
29、n embrittlement, pins should not be electroplated or phosphate-coated. If electroplating or phosphate coating is required for corrosion prevention, by agreement between customer and supplier, it is mandatory that the pins be baked immediately after plating to minimize the risk of hydrogen embrittlem
30、ent, see also hydrogen embrittlement relief according to ISO 4042. Nevertheless, freedom from hydrogen embrittlement is not absolutely guaranteed. Surface finish All tolerances shall apply prior to the application of a plating or coating. Plain, i.e. pins to supplied in natural finish. Workmanship P
31、ins shall be uniform in quality and 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. Acceptability The acceptance procedure shall be in accordance with ISO 3269. aOther materials as agreed
32、between customer and supplier. bUse of Cr is optional. 5 EN ISO 8751:2007 (E) 6 Designation EXAMPLE 1 A spring-type straight pin, coiled, light duty, with nominal diameter d1= 6 mm and nominal length l = 30 mm, made of steel (St) is designated as follows: Spring pin ISO 8751 - 6 30 - St EXAMPLE 2 A
33、spring-type straight pin, coiled, light duty, with nominal diameter d1= 6 mm and nominal length l = 30 mm, made of austenitic stainless steel (A) is designated as follows: Spring pin ISO 8751 - 6 30 - A 6 EN ISO 8751:2007 (E) Bibliography 1 ISO 8748, Spring-type straight pins Coiled, heavy duty 2 ISO 8750, Spring-type straight pins Coiled, standard duty 7 EN ISO 8751:2007 (E)
