1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Assembly tools for screws and nuts Square drive socketsPart 2: Machine-operated sockets (“impact“)BS ISO 2725-2:2017 ISO 2017Assembly tools for screws and nuts Square drive sockets Part 2: Machine-operated sockets (“imp
2、act”)Outils de manuvre pour vis et crous Douilles carr conducteur femelle Partie 2: Douilles machine (impact)INTERNATIONAL STANDARDISO2725-2Fourth edition2017-06Reference numberISO 2725-2:2017(E)National forewordThis British Standard is the UK implementation of ISO 27252:2017. It supersedes BS ISO 2
3、7252:2015, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MTE/15, Hand tools.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of
4、 a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 91069 2ICS 25.140.01Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under
5、the authority of the Standards Policy and Strategy Committee on 30 June 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 27252:2017 ISO 2017Assembly tools for screws and nuts Square drive sockets Part 2: Machine-operated sockets (“impact”)Outils de manuvre
6、pour vis et crous Douilles carr conducteur femelle Partie 2: Douilles machine (impact)INTERNATIONAL STANDARDISO2725-2Fourth edition2017-06Reference numberISO 2725-2:2017(E)BS ISO 27252:2017ISO 2725-2:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in Switzerlan
7、dAll rights reserved. Unless otherwise specified, no part of 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 requeste
8、d from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 27252:2017ISO 2725-2:2017(E)Foreword iv1 Scope . 12
9、Normative references 13 Terms and definitions . 14 Tolerances for width across flats . 15 Dimensions . 16 Designation 97 Marking 9Bibliography .10 ISO 2017 All rights reserved iiiContents PageBS ISO 27252:2017ISO 2725-2:2017(E)ForewordISO (the International Organization for Standardization) is a wor
10、ldwide federation of national standards bodies (ISO member bodies). The work of 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
11、 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 of electrotechnical standardization.The procedures used to develop this d
12、ocument and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Direc
13、tives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the deve
14、lopment of 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 information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary na
15、ture of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs 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.This
16、document was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 10, Assembly tools for screws and nuts, pliers and nippers.This fourth edition cancels and replaces the third edition (ISO 2725-2:2015), which has been technically revised with the following changes:a) additional wi
17、dths across flat sizes not covered by ISO 272 have been included, in order to better reflect the current market situation;b) Clause 5 “Technical specifications” has been deleted, as these are given in ISO 1711-2.A list of all parts in the ISO 2725 series can be found on the ISO website.iv ISO 2017 A
18、ll rights reservedBS ISO 27252:2017INTERNATIONAL STANDARD ISO 2725-2:2017(E)Assembly tools for screws and nuts Square drive sockets Part 2: Machine-operated sockets (“impact”)1 ScopeThis document specifies dimensions, designation, and marking of machine-operated “impact” square drive sockets with op
19、erating end having a hexagonal or double hexagonal form in accordance with ISO 1174-2.NOTE Machine-operated “impact” square drive sockets covered by this document are the ones identified in ISO 1703 under reference numbers 2 2 02 01 0.This document does not cover technical specifications for these p
20、roducts. Technical specifications are given in ISO 1711-2.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references,
21、 the latest edition of the referenced document (including any amendments) applies.ISO 691, Assembly tools for screws and nuts Wrench and socket openings Tolerances for general useISO 1174-2, Assembly tools for screws and nuts Driving squares Part 2: Driving squares for power socket tools3 Terms and
22、definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following addresses: ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp IEC Electropedia: available at h t t p :/ www .electropedia .o
23、rg/ 4 Tolerances for width across flatsTolerances for width across flats, s, shall be in conformity with the tolerances for socket openings given in ISO 691. Manufacturers are free to choose the series of deviations.5 DimensionsTable 1 to Table 6 gives the dimensions, in millimetres, of sockets show
24、n in Figure 1 to Figure 3 for driving squares of 6,3 to 40, which shall be in accordance with ISO 1174-2. Table 7 and Table 8 gives the dimensions, in millimetres, of the retaining pin and the dimensions of the retaining ring respectively, shown in Figure 4. ISO 2017 All rights reserved 1BS ISO 2725
25、2:2017ISO 2725-2:2017(E)The figures in this document are given only as examples. They are not intended to influence the manufacturers design.NOTE Width across flats, s, are partly taken from ISO 272.When using male square drive Form E according to ISO 1174-2, guide-ways in both possible connection p
26、ositions are at the manufacturers discretion.Key 115 150Figure 1 Sockets with d1d2Figure 4 Retaining pin and ringTable 1 Square drive of 6,3sDmaxctamin.d1max.d2max.d3bmin.lmax. min.Bolt clearance holeType A (normal)Type B (long)mm mm mm mm mm mm mm3,2 1,6 1,4 6,8 14 1,7 25 454 2 1,7 7, 8 14 2,1 25 4
27、55 2,5 2,1 9,1 14 2,6 25 455,5 3 2,5 9,7 14 3,2 25 456d3,5f2,9 10,3 14 3,7 25 457 5 3,3 11,6 14 5,3 25 458 6 4,8 12,8 14 6,3 25 459d6e5,1 14,1 16,0 6,3 25 4510 8 5,3 15,3 16 8,4 25 4511 8e5,8 16,6 16,6 8,4 25 4512d8 6,4 17, 8 17, 8 8,4 25 4513 10 6,9 19,1 19,1 10,5 25 4514d10 7,4 20,4 20,6 10,5 27 4
28、5 ISO 2017 All rights reserved 3BS ISO 27252:2017ISO 2725-2:2017(E)sDmaxctamin.d1max.d2max.d3bmin.lmax. min.Bolt clearance holeType A (normal)Type B (long)mm mm mm mm mm mm mm15d12 8,0 21,6 22 12,6 30 4516 12e8,5 22 22 12,6 35 4517 d12 9,7 23 23 12,6 35 45NOTE tminis interpolated for sizes not cover
29、ed by ISO 4032 and ISO 4014.atmin= mmax+ 0,1; where mmaxis the maximum height of the nut, according to ISO 4032.bd3min = Dmax 1,05.cThe maximum thread diameter, Dmax, is the largest nominal thread diameter found in current International Standards like, for example, ISO 4014, ISO 4032 and ISO 272.dNo
30、minal dimension not covered by ISO 272.eValue determined in order to avoid reduction in hole clearance size.fValue determined by market study.Table 2 Square drive of 10sDmaxctamin.d1max.d2max.d3bmin.lmax. min.Bolt clearance holeType A (normal)Type B (long)mm mm mm mm mm mm mm6d3,5f2,9 11,6 20 3,7 34
31、 447 5 3,3 12,8 20 5,3 34 448 6 4,8 14,1 20 6,3 34 449d6e5,1 15,4 20 6,3 34 4410 8 5,3 16,6 20 8,4 34 4411 8e5,8 17, 8 20 8,4 34 4412d8 6,4 19,1 20 8,4 34 4413 10 6,9 20,3 28 10,5 34 4414d10 7,4 21,6 28 10,5 34 4415d12 8,0 22,8 28 12,6 34 4516 12e8,5 24,1 28 12,6 34 5017d12 9,7 25,4 28 12,6 34 5218
32、14 10,9 26,6 28 14,7 34 5419d14 11,9 27, 8 28 14,7 34 5420d14e12,4 29,3 34 14,7 34 5421 16 12,9 30,6 34 16,8 34 5422d16 13,9 31,8 34 16,8 34 54Table 1 (continued)4 ISO 2017 All rights reservedBS ISO 27252:2017ISO 2725-2:2017(E)sDmaxctamin.d1max.d2max.d3bmin.lmax. min.Bolt clearance holeType A (norma
33、l)Type B (long)mm mm mm mm mm mm mm23d16e14,4 33 34 16,8 34 5424 16 14,9 34,3 34 16,8 34 54NOTE tminis interpolated for sizes not covered by ISO 4032 and ISO 4014.atmin= mmax+ 0,1; where mmaxis the maximum height of the nut, according to ISO 4032.bd3min= Dmax 1,05.cThe maximum thread diameter, Dmax,
34、 is the largest nominal thread diameter found in current International Standards like, for example, ISO 4014, ISO 4032, ISO 272.dNominal dimension not covered by ISO 272.eValue determined in order to avoid reduction in hole clearance size.fValue determined by market study.Table 3 Square drive of 12,
35、5sDmaxctamin.d1max.d2max.d3bmin.lmax. min.Bolt clearance holeType A (normal)Type B (long)mm mm mm mm mm mm mm8 6 4,8 15,5 28 6,3 40 759d6e5,1 16,7 28 6,3 40 7510 8 5,3 17, 8 28 8,4 40 7511 8e5,8 19 28 8,4 40 7512d8 6,4 20,3 28 8,4 40 7513 10 6,9 21,5 28 10,5 40 7514d10 7,4 22,8 37 10,5 40 7515d12 8,
36、0 24 37 12,6 40 7516 12e8,5 25,3 37 12,6 40 7517d12 9,7 26,5 37 12,6 40 7518 14 10,9 27, 8 37 14,7 40 7519d14 11,9 29 37 14,7 40 7520d14e12,4 31,5 37 14,7 40 7521 16 12,9 31,5 37 16,8 40 7522d16 13,9 32,8 37 16,8 40 7523d16e14,4 35,1 37 16,8 45 7524 16 14,9 36 37 16,8 45 7525d18e14,9 38,1 39 18,3 45
37、 7527 20 15,9 39 39 21,0 50 7530 20 18,1 44,6 44,6 21,0 50 75Table 2 (continued) ISO 2017 All rights reserved 5BS ISO 27252:2017ISO 2725-2:2017(E)sDmaxctamin.d1max.d2max.d3bmin.lmax. min.Bolt clearance holeType A (normal)Type B (long)mm mm mm mm mm mm mm32d24 18,8 45,8 45,8 25,2 50 7534 24e19,5 49,5
38、 49,5 25,2 50 75NOTE tminis interpolated for sizes not covered by ISO 4032 and ISO 4014.atmin= mmax+ 0,1; where mmaxis the maximum height of the nut, according to ISO 4032.bd3min= Dmax 1,05.cThe maximum thread diameter, Dmax, is the largest nominal thread diameter found in current International Stan
39、dards like, for example, ISO 4014, ISO 4032 and ISO 272.dNominal dimension not covered by ISO 272.eValue determined in order to avoid reduction in hole clearance size.Table 4 Square drive of 20sDmaxctamin.d1max.d2max.d3bmin.lmax. min.Bolt clearance holeType A (normal)Type B (long)mm mm mm mm mm mm m
40、m18 14 10,9 32,4 48 14,7 51 8519d14 11,9 33,6 48 14,7 51 8520d14e12,4 34,9 48 14,7 51 8521 16 12,9 36,1 48 16,8 51 8522d16 13,9 37,4 48 16,8 51 8523d16e14,4 39,9 48 16,8 51 8524 16 14,9 39,9 48 16,8 51 8525d18e14,9 43 48 18,3 54 8527 20 15,9 43,6 48 21,0 54 8530 20 18,1 47,4 48 21,0 54 8532d24 18,8
41、49,9 58 25,2 57 8534 24e19,5 52,4 58 25,2 58 8536 24 21,6 54,9 58 25,2 58 8541 27 23,9 61,1 61,1 28,4 63 8546 30 25,7 67,4 67,4 31,5 63 10050 33 28,8 74 74 34,7 89 100Table 3 (continued)6 ISO 2017 All rights reservedBS ISO 27252:2017ISO 2725-2:2017(E)sDmaxctamin.d1max.d2max.d3bmin.lmax. min.Bolt cle
42、arance holeType A (normal)Type B (long)mm mm mm mm mm mm mm55 36 31,1 80 80 37, 8 95 10060 39 33,5 86 86 41,0 100 100NOTE tminis interpolated for sizes not covered by ISO 4032 and ISO 4014.atmin= mmax+ 0,1; where mmaxis the maximum height of the nut, according to ISO 4032.bd3min= Dmax 1,05.cThe maxi
43、mum thread diameter, Dmax, is the largest nominal thread diameter found in current International Standards like, for example, ISO 4014, ISO 4032 and ISO 272.dNominal dimension not covered by ISO 272.eValue determined in order to avoid reduction in hole clearance size.Table 5 Square drive of 25sDmaxc
44、tamin.d1max.d2max.d3bmin.lmax.Bolt clearance holeType A (normal)mm mm mm mm mm mm27 20 15,9 46,7 58 21,0 6030 20 18,1 50,4 58 21,0 6232d24 18,8 52,9 58 25,2 6334 24e19,5 55,4 58 25,2 6336 24 21,6 57,9 58 25,2 6741 27 23,9 64,2 68 28,4 7046 30 25,7 70,4 68 31,5 7650 33 28,8 75,4 68 34,7 8255 36 31,1
45、81,7 68 37, 8 8760 39 33,5 87,9 68 41,0 9165 42 34,1 95,9 70,6 44,1 11070 45 36,1 98 70,6 47, 3 116NOTE tminis interpolated for sizes not covered by ISO 4032 and ISO 4014.atmin= mmax+ 0,1; where mmaxis the maximum height of the nut, according to ISO 4032.bd3min= Dmax 1,05.cThe maximum thread diamete
46、r, Dmax, is the largest nominal thread diameter found in current International Standards like, for example, ISO 4014, ISO 4032 and ISO 272.dNominal dimension not covered by ISO 272.eValue determined in order to avoid reduction in hole clearance size.Table 4 (continued) ISO 2017 All rights reserved 7
47、BS ISO 27252:2017ISO 2725-2:2017(E)Table 6 Square drive of 40sDmaxctamin.d1max.d2max.d3bmin.lmax.Bolt clearance holeType A (normal)mm mm mm mm mm mm36 24 21,6 64,2 86 25,2 8441 27 23,9 70,4 86 28,4 8446 30 25,7 76,7 86 31,5 8750 33 28,8 81,7 86 34,7 9055 36 31,1 87,9 86 37, 8 9060 39 33,5 94,2 86 41
48、,0 9565 42 34,1 100,4 86 44,1 10070 45 36,1 106,7 86 47, 3 105NOTE tminis interpolated for sizes not covered by ISO 4032 and ISO 4014.atmin= mmax+ 0,1; where mmaxis the maximum height of the nut, according to ISO 4032.bd3min= Dmax 1,05.cThe maximum thread diameter, Dmax, is the largest nominal threa
49、d diameter found in current International Standards like, for example, ISO 4014, ISO 4032 and ISO 272.Table 7 Retaining pinDriving squared4min. max.mm mm6,3 1,4 2,010 2,4 2,912,5 2,9 420 3,8 4,825 4,8 6,040 5,8 7,0Table 8 Retaining ringDriving squared5mm6,3 2,510 3,512,5 420 525 740 108 ISO 2017 All rights reservedBS ISO 27252:2017ISO 2725-2:2017(E)6 DesignationA machine-operated square drive socket in accordance with this document shall be designated
