© ISO 2016 Assembly tools for screws and nuts — Technical specifications — Part 2 Machine operated sockets (impact) Outils de manoeuvre pour vis et écrous — Spécifications techniques — Partie 2 Douill[.]
INTERNATIONAL STANDARD ISO 1711-2 Third edition 2016-1 -15 Assembly tools for screws and nuts — Technical specifications — Part 2: Machine-operated sockets (impact) Outils de manoeuvre pour vis et écrous — Spécifications techniques — Partie 2: Douilles machine (impact) Reference number ISO 1711-2:2016(E) © ISO 2016 ISO 1711-2:2016(E) COPYRIGHT PROTECTED DOCUMENT © ISO 2016, Published in Switzerland All rights reserved Unless otherwise specified, no part o f this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission Permission can be requested from either ISO at the address below or ISO’s member body in the country o f the requester ISO copyright o ffice Ch de Blandonnet • CP 401 CH-1214 Vernier, Geneva, Switzerland Tel +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii © ISO 2016 – All rights reserved ISO 1711-2:2 016(E) Page Contents Foreword iv Introduction v Scope Normative references Terms and definitions Test torsion torques Materials Hardness testing Torque testing 7.1 7.2 Method Test of machine-operated square drive sockets Bibliography © ISO 2016 – All rights reserved iii ISO 1711-2:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies) The work o f preparing International Standards is normally carried out through ISO technical committees Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters o f electrotechnical standardization The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part In particular the different approval criteria needed for the di fferent types o f ISO documents should be noted This document was dra fted in accordance with the editorial rules of the ISO/IEC Directives, Part (see www.iso.org/directives) Attention is drawn to the possibility that some o f the elements o f this document may be the subject o f patent rights ISO shall not be held responsible for identi fying any or all such patent rights Details o f any patent rights identified during the development o f the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents) Any trade name used in this document is in formation given for the convenience o f users and does not constitute an endorsement For an explanation on the meaning o f ISO specific terms and expressions related to formity assessment, as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html The committee responsible for this document is ISO/TC 29, Small tools, Subcommittee SC 10 , Assembly tools for screws and nuts, pliers and nippers This third edition cancels and replaces the second edition (ISO 1711-2:2015), which has been technically revised with the following changes: — Clause has been added, giving empiric formulae for minimum test torsion torques as a function of width across flats; — in 7.1 the angle chamfer α of the test mandrel in Figure has been changed from 30° max to 15° ≤ α ≤ 30°; — revision o f sizes for width across flats covered in Table ; Sizes 3,5, 4,5, 26 and 28 have been deleted; — revision of minimum test torque values in Table A list of all parts in the ISO 1711 series can be found on the ISO website iv © ISO 2016 – All rights reserved ISO 1711-2 :2 016(E) Introduction When te s ti ng mach i ne - op erate d i mp ac t s o cke ts , there a re th re e typ e s o f te s ti ng that cou ld b e releva nt: — tors iona l te s ti ng; — i mp ac t te s ti ng; — endurance testing T h i s c u ment covers on ly tors iona l te s ti ng o f mach i ne - op erate d s o cke ts P re s ently, the tors iona l te s t and hardness values given in this document ensure sockets will last a reasonable impact life if the appropriate tool is used An impact test or endurance test is desired, but at present, there is no procedure suitable for standardization available This will be an issue for a future revision of this document © ISO 2016 – All rights reserved v INTERNATIONAL STANDARD ISO 1711-2:2016(E) Assembly tools for screws and nuts — Technical specifications — Part 2: Machine-operated sockets (impact) Scope This document specifies hardness and minimum torsional strength for machine-operated square drive sockets in accordance with ISO 2725-2 intended for use with impact wrenches EXAMPLE NOTE Re ference nos 2 02 01 0; 2 02 02 0; 00 04 The sockets mentioned above are listed under their respective reference numbers in ISO 1703 Normative references The following documents are re ferred to in the text in such a way that some or all o f their content constitutes requirements o f this document For dated re ferences, only the edition cited applies For undated re ferences, the latest edition o f the re ferenced document (including any amendments) applies ISO 6508-1, Metallic materials — Rockwell hardness test — Part : Test method Terms and definitions No terms and definitions are listed in this document ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.org/ — ISO Online browsing platform: available at http://www.iso.org/obp Test torsion torques The empiric formulae giving minimum test torsion torques, M, in newton metres, as a function of width across flats, s, in millimetres, are given for information in Table The minimum test torsion torques to be applied are given in Table Table — Formulae giving minimum test torsion torques Nominal dimension for driving square 6,3 10 12,5 © ISO 2016 – All rights reserved Minimum test torsion torque M N⋅m s1,7 0,6 ⋅ s2,3 1,85 ⋅ s2 ISO 1711-2 :2016(E) Table (continued) 20 25 40 6,5 ⋅ s1,85 70 ⋅ s1,2 48 ⋅ s1,5 Materials Sockets, driving squares and all accessories shall be manufactured from steel The chemical composition and heat treatment shall be to produce tools conforming to requirements specified hereina fter Hardness testing The hardness test shall be carried out in accordance with ISO 6508-1 Sockets and attachments shall be hardened and tempered to Rockwell hardness values given in Table Table — Rockwell hardness values for machine-operated sockets as function of driving square and hexagon width across flats, s a Hardness a b HRC 40 to 48 38 to 46 7.1 6,3 3,2 ≤ s ≤ 16 — 10 ≤ s ≤ 14 15 ≤ s ≤ 24 Width across flats s are according to ISO 272 Driving square nominal size 12,5 ≤ s ≤ 14 15 ≤ s ≤ 34 20 — 17 ≤ s ≤ 60 b 25 — 27 ≤ s ≤ 70 40 — 36 ≤ s ≤ 70 For dimensions of driving squares, see ISO 1174-2 Torque testing Method The minimum test torsion torque values to be applied are given in Table The socket shall be fully engaged in a hexagon test mandrel as shown in Figure The height, h , and the width across corners, emin, of the mandrel are specified in Table The angle of the chamfer α shall be between 15° and 30° Smoothly apply the load until the minimum testing torque as given in Table is reached The nominal across-flats dimension o f the test mandrel shall be equal to the nominal dimension, s, with a tolerance of h8 The mandrel shall be hardened to not less than hardness 55 HRC A device in which the mandrel can be rotated at a certain torque determined with an accuracy o f ±2,5 % can also be used for this test Following the application o f the minimum test torsion torque, any possible damage or de formation shall not a ffect the usability o f the tool © ISO 2016 – All rights reserved ISO 1711-2:2 016(E) Key α e angle o f the chamfer, 15° ≤ α ≤ 30° width across corners h s test mandrel height width across flats NOTE The use of the 30° chamfer will reduce the effective engagement which might affect the ultimate test torque Figure — Test mandrel height, h , and width across flats, s 7.2 Test of machine-operated square drive sockets A square mandrel of hardness not less than 55 HRC shall be used for driving the socket for nominal width across flats 22 mm and smaller A square mandrel o f hardness not less than 50 HRC shall be used for driving the socket for nominal width across flats 24 mm and larger The nominal width across-flats dimension of this mandrel shall be equal to the maximum dimension, with a tolerance of h8, of the corresponding square drive The axis of the two mandrels and the axis of the socket shall remain coaxial during the test © ISO 2016 – All rights reserved ISO 1711-2 :2016(E) Table — Minimum test torsion torque and test mandrel height as a function of width across flats Minimum test torsion torque b Nominal width across flats s 3,2 5,5 6a 9a 10 11 12 a 13 14 a 15 16 17 a 18 19 a 20 a 21 22 a 23 a 24 25 a 27 30 32 a 34 36 41 46 50 55 Test mandrel mm M N·m 6,3 7,2 10,6 15,4 18,1 21,0 27,3 34,3 41,9 50,1 58,9 68,3 75,0 d 75,0 d 75,0 d 75,0 d 75,0 d — — — — — — — — — — — — — — — — — Driving square nominal size c 10 — — — — 37 53 72 94 120 149 182 219 260 280 d 280 d 280 d 280 d 280 d 280 d 280 d 280 d 280 d 280 d 280 d — — — — — — — — — 12,5 — — — — — — 118 150 185 224 266 313 363 416 474 535 599 650 d 650 d 650 d 650 d 650 d 650 d 650 d 650 d 650 d 650 d 650 d — — — — — 20 — — — — — — — — — — — — — — — — — — — 816 979 148 200 d 200 d 200 d 200 d 200 d 200 d 200 d 200 d 200 d 200 d 200 d 25 — — — — — — — — — — — — — — — — — — — — — — — — 654 000 d 000 d 000 d 000 d 000 d 000 d 000 d 000 d 40 — — — — — — — — — — — — — — — — — — — — — — — — — — — — 10 368 12 601 14 975 15 100 d 15 100 d Height h h13 1,3 1,6 2,4 2,8 3,2 4,4 4,8 5,6 6,4 7,4 8,8 9,6 10,2 10,7 11,2 11,8 12,3 12,8 13,3 14,4 16 16,8 17,6 19,2 21,6 24 26,4 28,8 Width across corners e e 3,62 4,52 5,65 6,22 6,78 7,91 9,04 10,17 11,30 12,43 13,56 14,69 15,82 16,95 18,08 19,21 20,34 21,47 22,6 23,73 24,86 25,99 27,12 28,25 30,51 33,90 36,16 38,42 40,68 46,33 51,98 56,50 62,15 Not according to ISO 272 Hexagons larger than tabled sizes are required to pass the highest tabled test torsion torque value shown for the applicable driving square c In accordance with ISO 1174-2 d The test torsion torque values have been limited due to the strength of the driving square for that hexagon size e e = snom × 1,13 values of e are rounded with two decimals a b © ISO 2016 – All rights reserved ISO 1711-2:2 016(E) Table (continued) Minimum test torsion torque Nominal width across flats s 60 65 70 b Test mandrel mm M N·m 6,3 — — — 10 — — — Driving square nominal size c 12,5 — — — 20 200 d — — 25 000 d 000 d 000 d 40 15 100 d 15 100 d 15 100 d Height h h13 31,2 33,6 36 Width across corners e e 67,80 73,45 79,10 Not according to ISO 272 Hexagons larger than tabled sizes are required to pass the highest tabled test torsion torque value shown for the applicable driving square c In accordance with ISO 1174-2 d The test torsion torque values have been limited due to the strength of the driving square for that hexagon size e e = snom × 1,13 values of e are rounded with two decimals a b © ISO 2016 – All rights reserved ISO 1711-2:2016(E) Bibliography [1] [2] [3] [4] ISO 272, Fasteners — Hexagon products — Widths across flats ISO 1174-2, Assembly tools for screws and nuts — Driving squares — Part 2: Driving squares for power socket tools ISO 1703, Assembly tools for screws and nuts — Designation and nomenclature ISO 2725-2, Assembly tools for screws and nuts — Square drive sockets — Part 2: Machine-operated sockets (”impact”) © ISO 2016 – All rights reserved ISO 71 -2 : 01 6(E) ICS 25.140.01 Price based on pages © ISO 2016 – All rights reserved