DIN 7500-2-2016 Thread rolling screws for ISO metric thread - Part 2 Guideline values for hole diameters《ISO 米制螺纹用螺纹压制螺钉 第2部分 孔直径的指导值》.pdf

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DIN 7500-2-2016 Thread rolling screws for ISO metric thread - Part 2 Guideline values for hole diameters《ISO 米制螺纹用螺纹压制螺钉 第2部分 孔直径的指导值》.pdf_第1页
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DIN 7500-2-2016 Thread rolling screws for ISO metric thread - Part 2 Guideline values for hole diameters《ISO 米制螺纹用螺纹压制螺钉 第2部分 孔直径的指导值》.pdf_第5页
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1、April 2016 English price group 5No part of this translation 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 21.040.30; 21.060.10!%Xc“2535764www

2、.din.deDIN 7500-2Thread rolling screws for ISO metric thread Part 2: Guideline values for hole diameters,English translation of DIN 7500-2:2016-04Gewindefurchende Schrauben fr metrisches ISO-Gewinde Teil 2: Richtwerte fr Lochdurchmesser,Englische bersetzung von DIN 7500-2:2016-04Vis taraudeuses par

3、roulage pour filetages mtriques ISO Partie 2: Diamtres thoriques des trous,Traduction anglaise de DIN 7500-2:2016-04SupersedesDIN 7500-2:1984-12www.beuth.deDocument comprises 6 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.12

4、.16DIN 7500-2:2016-04 2 A comma is used as the decimal marker. Contents Page Foreword . 3 1 Scope 4 2 Normative references 4 3 Guideline values for hole diameters . 5 DIN 7500-2:2016-04 3 Foreword This document has been prepared by Working Committee NA 067-00-05 AA Kleinschrauben und gewindeformende

5、 Schrauben of DIN-Normenausschuss Mechanische Verbindungselemente (DIN Standards Committee Fasteners). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such pa

6、tent rights. Amendments This standard differs from DIN 7500-2:1984-12 as follows: a) normative references have been updated; b) specifications for copper materials have been deleted; c) in Table 1, engagement lengths of 2,2 mm, 3,2 mm, and the range from 0,8 mm to 1,8 mm have been deleted, and the e

7、ntire range of engagement lengths has been extended up to 30 mm; d) reference to the International Patent Classification has been deleted. Previous editions DIN 7500-2: 1984-12 DIN 7500-2:2016-04 4 1 Scope This standard specifies guideline values for hole diameters of thread rolling screws complying

8、 with DIN 7500-1 and DIN 267-30. These hole diameters are the result of practical tests carried out by manufacturers and users. The values given are intended for guidance and they are assigned to various materials and lengths of engagement. For thread rolling screws according to DIN 267-30, the hole

9、 diameters only apply to screws made from aluminium materials. As there is a wide variety of designs of thread rolling screws where the rolling area is defined only in terms of the maximum length in DIN 7500-1 and DIN 267-30, it is advisable to examine the specified hole diameters, particularly in m

10、ass production, by internal checks. If the process of manufacturing the hole, e.g. punching, causes a hardness increase in the hole wall, larger hole diameters than those given in this standard may be required. This can also apply to cast holes (casting crust). An individual matching of the screw ge

11、ometry, including the rolling area, with the cast hole geometry is necessary, in particular for cast core holes. This standard does not apply to holes with particular shapes, e.g. triangular, octagonal. 2 Normative references The following documents, in whole or in part, are normatively referenced i

12、n this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 267-30, Fasteners Technical conditions Part 30: Metric thread rolling screws

13、of property class 10.9 DIN 7500-1, Thread rolling screws for ISO metric thread Part 1: Technical specifications for case hardened and tempered screws DIN EN 485-2, Aluminium and aluminium alloys Sheet, strip and plate Part 2: Mechanical properties DIN EN 10130, Cold rolled low carbon steel flat prod

14、ucts for cold forming Technical delivery conditions DIN 7500-2:2016-04 5 3 Guideline values for hole diameters For dimensions and guideline values see Figure 1 and Table 1. Figure 1 Hole diameters In Table 1 St = DC01, DC03, DC04, DC05 according to DIN EN 10130 Al = EN AW-1050A (Al99,5) according to

15、 DIN EN 485-2 DIN 7500-2:2016-04 6 Table 1 Guideline values for hole diameters Dimensions in millimetres Thread size d M2,5 M3 M3,5 M4 M5 M6 M8 M10 Length of engagement Hole diameter dh(tolerance class H11) St Al St Al St Al St Al St Al St Al St Al St Al 2 2,25 2,5 2,25 2,75 3 2,30 2,75 3,20 3,5 2,3

16、0 2,75 3,20 3,65 4 2,30 2,75 3,20 3,65 4,6 5 2,30 2,75 3,20 3,70 4,6 5,5 6 2,30 2,75 3,20 3,70 4,6 5,5 6,5 2,30 2,75 3,20 3,70 4,6 5,5 7,45 7 2,30 2,75 3,20 3,70 4,65 5,55 7,45 7,5 2,30 2,75 3,20 3,70 4,65 5,55 7,45 8 2,75 3,20 3,70 4,65 5,55 7,45 9,35 9 2,75 3,20 3,70 4,65 5,55 7,45 9,35 10 3,70 4,

17、65 5,55 7,45 9,35 10,5 4,65 5,55 7,45 9,35 12 4,65 5,60 7,45 9,35 12 to 15 5,60 7,45 9,35 15 to 16 5,60 7,50 9,35 16 to 18 5,60 7,50 9,35 18 to 20 7,50 9,35 20 to 24 7,50 9,35 24 to 30 9,40 Note Lengths of engagement smaller than those given in the table are not suitable for fully loadable screw con

18、nections. If such applications are nonetheless intended, the necessary hole diameters shall be determined by testing original parts in order to ensure lower screw-in torques on the one hand, and on the other hand to achieve the highest possible stripping torques. Larger lengths of engagement for the given thread sizes are not common practice. Therefore, when necessary, the suitable hole diameters shall also be determined by testing.

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