1、March 2011 Translation by DIN-Sprachendienst.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 2
2、5.140.30!$rA4“1793017www.din.deDDIN 7431Screwdrivers for hexagon insert bitsEnglish translation of DIN 7431:2011-03Steckgriffe mit InnensechskantEnglische bersetzung von DIN 7431:2011-03Porte-embouts interchangeablesTraduction anglaise de DIN 7431:2011-03SupersedesDIN 7431:1978-08www.beuth.deDocumen
3、t comprises pagesIn case of doubt, the German-language original shall be considered authoritative.09.11 6DIN 7431:2011-03 A comma is used as the decimal marker. Contents Page Foreword. 3 1 Scope . 4 2 Normative references . 4 3 Dimensions, designation, test torque 4 4 Material and design 5 5 Torque
4、testing. 5 6 Marking 5 Bibliography . 6 2 DIN 7431:2011-03 Foreword This standard has been prepared by Working Committee NA 121-05-01 AA Schraubwerkzeuge, Fgewerkzeuge of the Normenausschuss Werkzeuge und Spannzeuge (Tools and Clamping Devices Standards Committee). Amendments This standard differs f
5、rom DIN 7431:1978-08 as follows: a) normative references have been updated; b) the maximum length l has been increased from 120 mm to 150 mm for D 6,3 and from 170 mm to 175 mm for D 8 insert bits; c) requirements for the hardness of metallic components are no longer specified; d) the standard has b
6、een editorially revised. Previous editions DIN 7431: 1968-11, 1978-08 3 DIN 7431:2011-03 1 Scope Screwdrivers complying with this standard are intended to fit onto insert bits with male hexagon drive end of form C as in DIN ISO 1173. 2 Normative references The following referenced documents are indi
7、spensable 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. DIN ISO 1173, Assembly tools for screws and nuts Drive ends for hand- and machine-operated s
8、crewdriver bits and connecting parts Dimensions, torque testing 3 Dimensions, designation, test torque An example of a screwdriver for hexagon insert bits is shown in Figure 1. The design shown is for illustrative purposes only; however, the dimensions shall be as specified in Table 1. Design detail
9、s not given here remain unspecified. Type A without magnet Type B with magnet Key 1 Shaft at the manufacturerss discretion 2 Snap ring 3 Female hexagon form D as in DIN ISO 1173 aSectional illustration Figure 1 Dimensions of screwdriver for hexagon insert bits (notation) 4 DIN 7431:2011-03 Designati
10、on of a type A screwdriver with D 8 female hexagon: Screwdriver DIN 7431 A D 8 Table 1 Dimensions and test torque Dimensions in millimetresHexagon insert bit as in DIN ISO 1173 d max. l max. Test torque min. Nm D 6,3 12 150 D 8 15 175 15 4 Material and design Design according to DIN ISO 1173. The ma
11、terial and execution of the handle shall meet the requirements for the intended use under normal conditions. 5 Torque testing Following the application of the test torque the screwdrivers shall show no permanent deformation or any other damage, such as e.g. cracks or fractures, which might affect th
12、eir usability. 6 Marking The screwdrivers shall be marked with the size of the female hexagon, e.g D 8, and with the manufacturers name or trade mark. Unless featured on the screwdriver itself, the DIN number shall be stated at least on the smallest size of commercially used package. 5 DIN 7431:2011-03 6 Bibliography DIN EN ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T)
