1、BS ISO 3291:2016Extra-long Morse taper shanktwist drillsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 3291:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 3291:2016. The UK participation in its preparation was entr
2、usted to TechnicalCommittee 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 include all the necessary provisions of a contract. Users are responsible for it
3、s correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 83630 5 ICS 25.100.30 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy a
4、nd Strategy Committee on 30 November 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 3291:2016 ISO 2016Extra-long Morse taper shank twist drillsForets extra-longs queue cne MorseINTERNATIONAL STANDARDISO3291Third edition2016-11-01Reference numberISO 3291:2016(E)
5、BS ISO 3291:2016ISO 3291:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll 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, in
6、cluding 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 member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTe
7、l. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 3291:2016ISO 3291:2016(E)Foreword iv1 Scope . 12 Normative references 13 Dimensions . 14 Technical specifications 15 Designations . 1Annex A (informative) Relationship between designations in this International Standard and ISO
8、 13399 (all parts) 4Bibliography 5 ISO 2016 All rights reserved iiiContents PageBS ISO 3291:2016ISO 3291:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards i
9、s 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 par
10、t in the work. ISO collaborates closely 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 particul
11、ar 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 Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this
12、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 development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.is
13、o.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 meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the Wo
14、rld 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 2, Holding tools, adaptive items and interfaces.This third edition cancels and
15、replaces the second edition (ISO 3291:1995), of which it constitutes a minor revision, notably with the addition of Annex A, which gives the relationship between the designations of this International Standard and the ISO 13399 series.iv ISO 2016 All rights reservedBS ISO 3291:2016INTERNATIONAL STAN
16、DARD ISO 3291:2016(E)Extra-long Morse taper shank twist drills1 ScopeThis International Standard specifies the dimensions of extra-long Morse taper shank drills in the range of 6 mm to 50 mm diameter with an overall length range of 200 mm to 630 mm.2 Normative referencesThe following documents, in w
17、hole or in part, are normatively referenced in 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.ISO 296, Machine tools Self-holding t
18、apers for tool shanksISO 10899, High-speed steel two-flute twist drills Technical specifications3 DimensionsSee Figure 1 and Tables 1 and 2.4 Technical specificationsUnless otherwise specified, technical requirements shall comply with ISO 10899.5 DesignationsExtra Morse taper shank twist drills in a
19、ccordance with this International Standard shall be designated by the following:a) “twist drill”;b) a reference to this International Standard, i. e. ISO 3291;c) drill diameter, d, in millimetres;d) overall length, l, in millimetres.EXAMPLE An extra-long Morse taper shank twist drill of diameter d =
20、 10 mm and overall length l = 250 mm shall be designated as follows:Twist drill ISO 3291 - 10 - 250 ISO 2016 All rights reserved 1BS ISO 3291:2016ISO 3291:2016(E)Key1 Morse taper shankFigure 1 Extra-long Morse taper shank twist drillTable 1 Extra-long Morse taper shank twist drill, preferred sizesDi
21、mensions in millimetresPreferred diametersOverall length Morse taper shank no.ad lh8 200 250 315 400 500 6306 X X X 16,5 X X X7 X X X7, 5 X X X8 X X X8,5 X X X9 X X X9,5 X X X10 X X X11 X X X12 X X X13 X X X14 X X X15 X X X 216 X X X17 X X X18 X X X19 X X X20 X X X21 X X X22 X X X23 X X XNOTE For th
22、e values flute length, l1, see Table 2.aIn accordance with ISO 296.2 ISO 2016 All rights reservedBS ISO 3291:2016ISO 3291:2016(E)Preferred diametersOverall length Morse taper shank no.ad lh8 200 250 315 400 500 63024 X X X 325 X X X28 X X X30 X X X32 X X X 435 X X X38 X X X40 X X X42 X X45 X X48 X X
23、50 X XRange of diameters6 d 9,5 6 d 14 6 d 23 9,5 d 40 14 d 50 23 d 50NOTE For the values flute length, l1, see Table 2.aIn accordance with ISO 296.Table 2 Flute length, l1, of extra-long Morse taper shank twist drillDimensions in millimetresMorse taper shank no.Overall length, l200 250 315 400 500
24、630Flute length, l11 110 160 225 3102 215 300 4003 275 375 5054 250 350 480Table 1 (continued) ISO 2016 All rights reserved 3BS ISO 3291:2016ISO 3291:2016(E)Annex A (informative) Relationship between designations in this International Standard and ISO 13399 (all parts)For relationship between design
25、ations in this International Standard and preferred symbols according to ISO 13399 (all parts), see Table A.1.Table A.1 Relationship between designations in this International Standard and ISO 13399 (all parts)Symbol in ISO 3291Reference in ISO 3291Property name in ISO 13399 (all parts)Symbol in ISO
26、 13399 (all parts)Reference in ISO 13399 (all parts)dFigure 1 Table 1cutting diameter DC 71D084653E57Fl1Figure 1 Table 2length chip flute LCF 71DCCC27DEF53lFigure 1 Table 1 and Table 2overall length OAL 71D078EB7C0864 ISO 2016 All rights reservedBS ISO 3291:2016ISO 3291:2016(E)Bibliography1 ISO 235,
27、 Parallel shank jobber and stub series drills and Morse taper shank drills2 ISO 494, Cylindrical shank twist drills Long series3 ISO 3292, Extra-long parallel shank twist drills4 ISO 13399 (all parts), Cutting tool data representation and exchange ISO 2016 All rights reserved 5BS ISO 3291:2016ISO 32
28、91:2016(E) ISO 2016 All rights reservedICS 25.100.30Price based on 5 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is incorporated by Royal Charter. British Standards a
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