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!,z24“9871517www.
2、din.deDDIN EN ISO 8750Spring-type straight pins Coiled, standard duty (ISO 8750:2007)English version of DIN EN ISO 8750:2007-07Spiralspannstifte Regelausfhrung (ISO 8750:2007)Englische Fassung DIN EN ISO 8750:2007-07SupersedesDIN EN ISO 8750:1998-03www.beuth.deDocument comprises 11 pages09.07DIN EN
3、ISO 8750:2007-07 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 8750:1998-03 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 8750: 1991-04 DIN EN 28750:
6、1992-10 DIN EN ISO 8750: 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 8750:2007-07 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 8750:2007-07 4 This page is intentionally blank EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8750April 2007ICS 21.060.50 Supersedes EN ISO 8750:1997 English VersionSpiralspannstifte - Regelausfhrung
9、 (ISO 8750:2007)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 this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliog
10、raphical 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 (English, French, German). A version in any other language made by translationunder the responsibility of a
11、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, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, It
12、aly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, 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
13、Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 8750:2007: E(ISO 8750:2007)(ISO 8750:2007)Spring-type straight pins - Coiled, standard dutyGoupilles lastiques spirales - Srie moyenneForeword This document (EN ISO 87
14、50:2007) 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 8750:1997. 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, Switzer
17、land and United Kingdom. Endorsement notice The text of ISO 8750:2007 has been approved by CEN as EN ISO 8750:2007 without any modifications. EN ISO 8750:2007 (E) 2 1 Scope This International Standard specifies the characteristics of coiled, standard duty spring-type straight pins made of steel or o
18、f austenitic or martensitic stainless steel, with a nominal diameter, d1, from 0,8 mm to 20 mm inclusive. NOTE Spring-type straight pins, coiled, heavy duty, and spring type straight pins, coiled, light duty, are the subjects of ISO 8748 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 8750:2007 (E) 3Table 1 Dimensions Dimensions in millimetres nom. 0,8 1 1,2 1,5 2 2,5 3 3,5 4 5 6 8 10 12 14 16 20 max. 0,91 1,15 1,35 1,73 2,25 2,78 3,30 3,84 4,4 5,50 6,50 8,63 10,80 12,85 14,95 17,00 21,1d1before mounting min. 0,85 1,05 1,25 1,6
22、2 2,13 2,65 3,15 3,67 4,2 5,25 6,25 8,30 10,35 12,40 14,45 16,45 20,4d2before mounting max. 0,75 0,95 1,15 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 0,3 0,3 0,4 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 0,07 0,08 0,1 0,13 0,17 0,21 0,25 0,29 0,33 0,42 0,5 0,67 0,84 1 1,
23、2 1,3 1,7 a 0,4 0,6 0,9 1,45 2,5 3,9 5,5 7,5 9,6 15 22 39 62 89 120 155 250Minimum shear strength, double, kN b 0,3 0,45 0,65 1,05 1,9 2,9 4,2 5,7 7,6 11,5 16,8 30 48 67 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,
24、5 20 19,5 20,5 22 21,5 22,5 Range 24 23,5 24,5 26 25,5 26,5 28 27,5 28,5 of 30 29,5 30,5 32 31,5 32,5 35 34,5 35,5 commercial 40 39,5 40,5 45 44,5 45,5 50 49,5 50,5 lengths 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 94,2
25、5 95,75 100 99,25 100,75 120 119,25 120,75 140 139,25 140,75 160 159,25 160,75 180 179,25 180,75 200 199,25 200,75 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.EN ISO 8750:2
26、007 (E) 4 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 in accordance with ISO 286-2. For pins with a nominal diameter of 1,2 mm and below, the tolerance class of the hole di
27、ameter shall be H10 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
28、Chemical 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
29、 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 Materiala Hardness testing according to ISO 6507-1. Hardness testing according to ISO 6507-1
30、. 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 employed to avoid hydrogen embrittlement. Due to the risk of
31、 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 immediately after plating to minimize the risk of hydrogen em
32、brittlement, 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. Workm
33、anship Pins shall be free of irregularities or detrimental defects. No burrs shall appear on any part of the pin. EN ISO 8750:2007 (E) 5Table 2 (continued) Shear strength test The test shall be in accordance with ISO 8749. Acceptability The acceptance procedure shall be in accordance with ISO 3269.
34、aOther materials as agreed between customer and supplier. bUse of Cr is optional. 6 Designation EXAMPLE 1 A spring-type straight pin, coiled, standard duty, with nominal diameter d1= 6 mm and nominal length l = 30 mm, made of steel (St) is designated as follows: Spring pin ISO 8750 - 6 30 - St EXAMP
35、LE 2 A spring-type straight pin, coiled, standard 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 8750 - 6 30 - A EN ISO 8750:2007 (E) 6 Bibliography 1 ISO 8748, Spring-type straight pins Coiled, heavy duty 2 ISO 8751, Spring-type straight pins Coiled, light duty EN ISO 8750:2007 (E) 7
