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!,z25“9871518www.
2、din.deDDIN EN ISO 8748Spring-type straight pins Coiled, heavy duty (ISO 8748:2007)English version of DIN EN ISO 8748:2007-07Spiralspannstifte Schwere Ausfhrung (ISO 8748:2007)Englische Fassung DIN EN ISO 8748:2007-07SupersedesDIN EN ISO 8748:1998-03www.beuth.deDocument comprises 11 pages09.07DIN EN
3、ISO 8748:2007-07 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 V
4、erbindungselemente (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 87
5、49 DIN EN 28749 ISO 6507-1 DIN EN ISO 6507-1 Amendments This standard differs from DIN EN ISO 8748:1998-03 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 7344: 1969-04 DIN ISO 8748: 1991-04 DIN EN 28748:
6、1992-10 DIN EN ISO 8748: 1998-03 Product properties The product properties of spring-type straight pins as specified in this standard are given in DIN 4000-163. DIN EN ISO 8748:2007-07 3 National Annex NA (informative) Bibliography DIN 4000-163, Tabular layout of product properties Part 163: Fastene
7、rs without thread DIN EN 28749, Determination of shear strength of pins 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
8、 2: Tables of standard tolerance grades and limit deviations for holes and shafts DIN EN ISO 8748:2007-07 4 This page is intentionally blank EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8748April 2007ICS 21.060.50 Supersedes EN ISO 8748:1997 English VersionSpring-type straight pins - Coiled
9、, heavy duty (ISO 8748:2007)Goupilles lastiques spirales - Srie paisse Spiralspannstifte - Schwere Ausfhrung (ISO 8748:2007)This European Standard was approved by CEN on 22 March 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
10、this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions
11、(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 Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgar
12、ia, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATI
13、ONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 8748:2007: E(ISO 8748:2007)Foreword This document (EN ISO 8
14、748:2007) has been prepared by Technical Committee ISO/TC 2 “Fasteners” in collaboration with Technical Committee 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
15、 endorsement, at the latest by October 2007, and conflicting national standards shall be withdrawn at the latest by October 2007. This document supersedes EN ISO 8748:1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to
16、 implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switze
17、rland and United Kingdom. Endorsement notice The text of ISO 8748:2007 has been approved by CEN as EN ISO 8748:2007 without any modifications. EN ISO 8748:2007 (E) 2 1 Scope This International Standard specifies the characteristics of coiled heavy duty spring-type straight pins made of steel or of a
18、ustenitic or martensitic stainless steel, with a nominal diameter, d1, from 1,5 mm to 20 mm inclusive. NOTE Spring-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 followi
19、ng referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. 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 s
20、tandard tolerance grades and limit deviations for holes and shafts ISO 3269, Fasteners Acceptance inspection ISO 4042, Fasteners Electroplated 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 Ta
21、ble 1. aSwaged chamfer at both ends. Figure 1 EN ISO 8748:2007 (E) 3 Table 1 Dimensions Dimensions in millimetres nom. 1,5 2 2,5 3 3,5 4 5 6 8 10 12 14 16 20 max. 1,71 2,21 2,73 3,25 3,79 4,30 5,35 6,40 8,55 10,65 12,75 14,85 16,9 21,0d1before mounting min. 1,61 2,11 2,62 3,12 3,64 4,15 5,15 6,18 8,
22、25 10,30 12,35 14,40 16,4 20,4d2before mounting max. 1,4 1,9 2,4 2,9 3,4 3,9 4,85 5,85 7,8 9,75 11,7 13,6 15,6 19,6a 0,5 0,7 0,7 0,9 1 1,1 1,3 1,5 2 2,5 3 3,5 4 4,5 s 0,17 0,22 0,28 0,33 0,39 0,45 0,56 0,67 0,9 1,1 1,3 1,6 1,8 2,2 a 1,9 3,5 5,5 7,6 10 13,5 20 30 53 84 120 165 210 340 Minimum shear s
23、trength, double, kN b 1,45 2,5 3,8 5,7 7,6 10 15,5 23 41 64 91 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 18 17,5 18,5 20 19,5 20,5 22 21,5 22,5 24 23,5 24,5 26 25,5 26,5 28 27,5 28,5 Range 30 29,5 30,5 32 31,5 32,5 35 34,5
24、35,5 of 40 39,5 40,5 45 44,5 45,5 50 49,5 50,5 commercial 55 54,25 55,75 60 59,25 60,75 65 64,25 65,75 lengths 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 99,25 100,75 120 119,25 120,75 140 139,25 140,75 160 159,25 160,75 180 179,25 180,75 200 199,25
25、 200,75 aApplies to steel and martensitic corrosion-resistant steel products. bApplies to austenitic stainless steel products. cFor nominal lengths above 200 mm, steps of 20 mm. EN ISO 8748:2007 (E) 4 4 Application The diameter of the hole into which the spring pin is to be inserted shall be equal t
26、o the nominal diameter, d1, of the mating pin and to tolerance 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
27、 pin diameters Alternative for pin diameters d1 12 mm Chemical composition limits (chemical analysis) % Chemical compositions limits (chemical analysis) % C W 0,64 Mn W 0,60 Si W 0,15 Cr b P 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,
28、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 Mn 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 Material aHardness testing accordin
29、g to ISO 6507-1. Hardness testing according to ISO 6507-1. Plain, 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 emp
30、loyed to avoid hydrogen embrittlement. Due to the risk of hydrogen 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 imme
31、diately after plating to minimize the risk of hydrogen embrittlement, 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 coati
32、ng. Plain, i.e. pins to be supplied in natural finish. 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. Acceptability The acceptance procedure shall be in accordan
33、ce with ISO 3269. aOther materials as agreed between customer and supplier. bUse of Cr is optional. EN ISO 8748:2007 (E) 5 6 Designation EXAMPLE 1 A spring-type straight pin, coiled, heavy duty, with nominal diameter d1= 6 mm and nominal length l = 30 mm, made of steel (St) is designated as follows:
34、 Spring pin ISO 8748 - 6 30 - St EXAMPLE 2 A spring-type straight pin, coiled, heavy 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 8748 - 6 30 - A EN ISO 8748:2007 (E) 6 Bibliography 1 ISO 8750, Spring-type straight pins Coiled, standard duty 2 ISO 8751, Spring-type straight pins Coiled, light duty EN ISO 8748:2007 (E) 7
