1、BS ISO 238:2016Reduction sleeves andextension sockets for toolswith Morse taper shanksBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 238:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 238:2016.It supersedes BS 1660
2、-2:1988 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MTE/18, Tools tips and inserts for cutting applications.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to inclu
3、de all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 83625 1 ICS 25.060.20 Compliance with a British Standard cannot confer immunity from legal obligations.This B
4、ritish Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 238:2016 ISO 2016Reduction sleeves and extension sockets for tools with Morse taper shanksDouilles de
5、rduction et allonges pour outils au cne MorseINTERNATIONAL STANDARDISO238Second edition2016-11-15Reference numberISO 238:2016(E)BS ISO 238:2016ISO 238:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified,
6、 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 requested from either ISO at the address below or ISOs me
7、mber 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 238:2016ISO 238:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Int
8、erchangeability 14.1 General . 14.2 Reduction sleeves . 14.3 Extension sockets . 15 Reduction sleeves for tools with Morse taper shanks . 26 Extension sockets for tools with Morse taper shanks . 4Annex A (informative) Relationship between designations in this document and ISO 13399 8Bibliography 9 I
9、SO 2016 All rights reserved iiiContents PageBS ISO 238:2016ISO 238:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO tec
10、hnical 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 closel
11、y with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria nee
12、ded for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, 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
13、rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development 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
14、this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on 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) principle
15、s 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 2, Holding tools, adaptive items and interfaces.This second edition cancels and replaces the first edition (ISO 238:1
16、974), of which it constitutes a minor revision, notably with the addition of Annex A, which gives the relationship between the designations of this document and the ISO 13399 series.iv ISO 2016 All rights reservedBS ISO 238:2016INTERNATIONAL STANDARD ISO 238:2016(E)Reduction sleeves and extension so
17、ckets for tools with Morse taper shanks1 ScopeThis document specifies the dimensions of the following two pieces of equipment:a) reduction sleeves for tools with Morse taper shanks;b) extension sockets for tools with Morse taper shanks.It comprises, for each of them, two tables giving the dimensions
18、 in millimetres and the corresponding dimensions in inches, respectively.2 Normative referencesThere are no normative references in this document.3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at th
19、e following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 Interchangeability4.1 GeneralThe numerical values given, whether in millimetres or in inches, automatically ensure interchangeability with the correspon
20、ding machines and tools, whatever the system of units employed.The mating dimensions of the sleeves and sockets are in fact in accordance with those specified in ISO 296 for Morse taper shanks, which were determined so as to give the same guarantee of interchangeability.4.2 Reduction sleevesIn the r
21、eduction sleeves in millimetres and in inches, the inside taper is always strictly the same as the standard Morse taper of the same number, even in its length.The same applies to the outside taper, except for the length which is sometimes equal to or sometimes greater than that of the standard taper
22、 of the same number.4.3 Extension socketsThe statements made above concerning the Morse taper dimensions of the reduction sleeves are equally applicable to the extension sockets, under the same conditions. ISO 2016 All rights reserved 1BS ISO 238:2016ISO 238:2016(E)Table 3 and Table 4 also specify,
23、for the latter, the diameter of the parallel portion and the minimum value for the total length l2.Lengths l2above this minimum should be selected to suit requirements, but preference should be given to multiples of 5 mm or 1/4 inch or even 10 mm or 1/2 inch.NOTE This minimum will be either the mini
24、mum value shown in the tables or the slightly larger one indicated in the relevant note as “reinforced minimum”.5 Reduction sleeves for tools with Morse taper shanksAn example of a method of designating a reduction sleeve with outside Morse taper 4 and inside Morse taper 2 is shown in Figure 1.Key1
25、outside Morse taper2 inside Morse taperFigure 1 Reduction sleeve Morse 4 22 ISO 2016 All rights reservedBS ISO 238:2016ISO 238:2016(E)Table 1 Dimensions (mm)Dimensions in millimetresOutside taper Inside taperM.T. No.d l a1M.T. No.d12 17,780 92 17 1 12,0653 23,82599 5 1 12,065112 18 2 17,7804 31,2671
26、24 6,5(1) 12,0652 17,780140 22,5 3 23,8255 44,399156 6,5(1) 12,065(2) 17,7803 23,825171 21,5 4 31,2676 63,348 218 8(1) 12,065(2) 17,7803 23,8254 31,2675 44,399The use of those sizes where the inside taper is shown in brackets should be avoided whenever possible.Morse tapers are in accordance with IS
27、O 296 dealing with self-holding tapers for tool shanks (except for the dimensions a1and l which are greater for certain tools than the corresponding dimensions a and l2given in ISO 296).Table 2 Dimensions (inches)Dimensions in inchesOutside taper Inside taperM.T. No.d l a1M.T. No.d12 0,700 35811161
28、0,4753 0,9383783161 0,47543811162 0,7004 1,23147814(1) 0,4752 0,700512783 0,9385 1,74861814(1) 0,475(2) 0,7003 0,93863427324 1,231The use of those sizes where the inside taper is shown in brackets should be avoided whenever possible.Morse tapers are in accordance with ISO 296 dealing with self-holdi
29、ng tapers for tool shanks (except for the dimensions a1and l which are greater for certain tools than the corresponding dimensions a and l2given in ISO 296). ISO 2016 All rights reserved 3BS ISO 238:2016ISO 238:2016(E)Outside taper Inside taperM.T. No.d l a1M.T. No.d16 2,494 8916516(1) 0,475(2) 0,70
30、03 0,9384 1,2315 1,748The use of those sizes where the inside taper is shown in brackets should be avoided whenever possible.Morse tapers are in accordance with ISO 296 dealing with self-holding tapers for tool shanks (except for the dimensions a1and l which are greater for certain tools than the co
31、rresponding dimensions a and l2given in ISO 296).6 Extension sockets for tools with Morse taper shanksAn example of the method of designating an extension socket with outside Morse taper 4 and inside Morse taper 2 is shown in Figure 2.Key1 outside Morse taper2 inside Morse taperFigure 2 Extension so
32、cket Morse 4 2Table 2 (continued)4 ISO 2016 All rights reservedBS ISO 238:2016ISO 238:2016(E)Table 3 Dimensions (mm)Dimensions in millimetresOutside taper Inside taperd2l2M.T. No.d l a1M.T. No.d11 12,065 69 71 12,065 20 145(2) 17,780 30 1602 17,780 84 91 12,065 20 1602 17,780 30 175(3) 23,825 36 196
33、3 23,82599 5 1 12,065 20 175103 92 17,780 30 1943 23,825 36 215(4) 31,267 48 2404 31,267124 6,5(1) 12,065 20 2002 17,780 30 215128 10,53 23,825 36 2404 31,267 48 265(5) 44,399 63 3005 44,399156 6,5(1) 12,065 20 232(2) 17,780 30 2473 23,825 36 268163 13,54 31,267 48 3005 44,399 63 3356 63,348 218 8(1
34、) 12,065 20 294(2) 17,780 30 309(3) 23,825 36 3304 31,267 48 3555 44,399 63 390The use of those sizes where the inside taper is shown in brackets should be avoided whenever possible.The minimum length shown for l2is the normal. The minimum described as “reinforced” comprises the same values, increas
35、ed as follows: 5 mm or inch for extension sockets with inside tapers 1 to 3; 10 mm or inch for those with inside tapers 4 and 5.For the choice of length l2above the minimum shown above, give preference, to suit requirements, to lengths in multiples of 5 mm or inch, and 10 mm or inch.Morse tapers are
36、 in accordance with ISO 296 dealing with self-holding tapers for tool shanks (except for the dimensions a1and l which are greater for certain tools than the corresponding dimensions a and l2given in ISO 296). ISO 2016 All rights reserved 5BS ISO 238:2016ISO 238:2016(E)Table 4 Dimensions (inches)Dime
37、nsions in inchesOutside taper Inside taperd2l2min.M.T. No.d l a1M.T. No.d11 0,475 2343321 0,475 0,787 534(2) 0,700 1,181 6382 0,700 33811321 0,475 0,787 6382 0,700 1,181 678(3) 0,938 1,417 7343 0,9383783161 0,475 0,787 67841811322 0,700 1,181 7583 0,938 1,417 812(4) 1,231 1,890 9384 1,23147814(1) 0,
38、475 0,787 7782 0,700 1,181 812513323 0,938 1,417 9384 1,231 1,890 1012(5) 1,748 2,480 11785 1,74861814(1) 0,475 0,787 918(2) 0,700 1,181 9343 0,938 1,417 103863817324 1,231 1,890 11785 1,748 2,480 13146 ISO 2016 All rights reservedBS ISO 238:2016ISO 238:2016(E)Outside taper Inside taperd2l2min.M.T.
39、No.d l a1M.T. No.d16 2,494 8916516(1) 0,475 0,787 1158(2) 0,700 1,181 1218(3) 0,938 1,417 134 1,231 1,890 145 1,748 2,480 1538The use of those size where the inside taper is shown in brackets should be avoided whenever possible.The minimum length shown for l2is the normal. The minimum described as “
40、reinforced” comprises the same values, increased as follows: 5 mm or inch for extension sockets with inside tapers 1 to 3; 10 mm or inch for those with inside tapers 4 and 5.For the choice of length l2above the minimum shown above, give preference, to suit requirements, to lengths in multiples of 5
41、mm or inch, and 10 mm or inch.Morse tapers are in accordance with ISO 296 dealing with self-holding tapers for tool shanks (except for the dimensions a1and l which are greater for certain tools than the corresponding dimensions a and l2given in ISO 296).Table 4 (continued) ISO 2016 All rights reserv
42、ed 7BS ISO 238:2016ISO 238:2016(E)Annex A (informative) Relationship between designations in this document and ISO 13399For relationship between designations in this document and preferred symbols according to ISO 13399, see Table A.1.Table A.1 Relationship between designations in this International
43、 Standard and ISO 13399Symbol in this documentReference in this documentProperty name in the ISO 13399 seriesSymbol in the ISO 13399 seriesReference in the ISO 13399 seriesM.T. No.outside taperFigure 1, Figure 2Table 1, Table 2, Table 3 and Table 4connection size code machine sideCZCMS 71EBDBF5060E6
44、M.T. No.inside taperFigure 1, Figure 2Table 1, Table 2, Table 3 and Table 4connection size code workpiece sideCZCWS 727C2BCBC1684lFigure 1Table 1 and Table 2overall length OAL 71D078EB7C086l2Figure 2Table 3 and Table 4overall length OAL 71D078EB7C0868 ISO 2016 All rights reservedBS ISO 238:2016ISO 2
45、38:2016(E)Bibliography1 ISO 296, Machine tools Self-holding tapers for tool shanks2 ISO 13399 (all parts), Cutting tool data representation and exchange ISO 2016 All rights reserved 9BS ISO 238:2016ISO 238:2016(E)ICS 25.060.20Price based on 9 pages ISO 2016 All rights reservedThis page deliberately
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