1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 3438:2013Subland twist drills for holesprior to tapping screw threadsBS ISO 3438:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of IS
2、O 3438:2013. Itsupersedes BS ISO 3438:2003 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee MTE/18, Tools tips and inserts for cutting applications.A list of organizations represented on this committee can beobtained on request to its secretary.This publ
3、ication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 77002 9ICS 25.100.30Compliance with a British Standard cannot confer immunity
4、fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2013.Amendments issued since publicationDate Text affectedBS ISO 3438:2013 ISO 2013Subland twist drills for holes prior to tapping screw threadsForets tags pour avan
5、t-trous de taraudageINTERNATIONAL STANDARDISO3438Third edition2013-05-01Reference numberISO 3438:2013(E)BS ISO 3438:2013ISO 3438:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced o
6、r 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 member body in the country of the requester.ISO co
7、pyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 3438:2013ISO 3438:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Dimensions . 13.1 Gene
8、ral . 13.2 Subland twist drills with Morse taper shank 13.3 Subland twist drill with cylindrical shank 2Annex A (informative) Relationship between the symbols of this International Standard and the ISO 13399 series . 4Bibliography 5BS ISO 3438:2013ISO 3438:2013(E)ForewordISO (the International Organ
9、ization 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 technical committees. Each member body interested in a subject for which a technical committee has been establish
10、ed 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 of electrotechnical standardization.
11、International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publ
12、ication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.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 r
13、ights.ISO 3438 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 2, High speed steel cutting tools and their attachments.This third edition cancels and replaces the second edition (ISO 3438:2003), of which it constitutes a minor revision with the following changes: merging
14、of ISO 3438:2003 and ISO 3439:2003 into a single standard; adding of an informative annex giving the relationship between the symbols of this document and the symbols according to the ISO 13399 series.iv ISO 2013 All rights reservedBS ISO 3438:2013INTERNATIONAL STANDARD ISO 3438:2013(E)Subland twist
15、 drills for holes prior to tapping screw threads1 ScopeThis International Standard specifies the dimensions of subland twist drills with Morse taper shanks and cylindrical shanks for holes prior to tapping screw threads.The drills are designed to produce holes prior to tapping metric threads (coarse
16、 pitch series) over a selected range of: M8 to M30 for subland twist drills with Morse taper shanks; M3 to M14 for subland twist drills with cylindrical shanks.This International Standard complements ISO 2306.The relationship between the symbols of this International Standard and those according to
17、the ISO 13399 series is given for information in Annex A.2 Normative referencesThe following documents, in whole 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
18、 edition of the referenced document (including any amendments) applies.ISO 296, Machine tools Self-holding tapers for tool shanksISO 2768-1, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indicationsISO 10899:1996, High-speed steel two-flute twis
19、t drills Technical specifications3 Dimensions3.1 GeneralAll dimensions and tolerances are given in millimetres. Tolerances not specified shall be of tolerance class “c” in accordance with ISO 2768-1.3.2 Subland twist drills with Morse taper shankThe dimensions for subland twist drills with Morse tap
20、er shanks shall be in accordance with the dimensions shown in Figure 1 and given in Table 1. ISO 2013 All rights reserved 1BS ISO 3438:2013ISO 3438:2013(E)aOptional recess.bMorse taper in accordance with ISO 296, but with a cone tolerance as defined in ISO 10899:1996, 5.3, and Annex A.Figure 1 Subla
21、nd twist drill with Morse taper shankTable 1 Dimensions of subland twist drill with Morse taper shank prior to tapping metric screw threadsd1h8d2h8l1l2l3Morse taper No.Thread6,8 9 162 81 211M8 1,258,5 11 175 94 25,5 M10 1,510,2 13,5 189 108 30 M12 1,7512 15,5 218 120 34,52M14 214 17,5 228 130 38,5 M
22、16 215,5 20 238 140 43,5 M18 2,517,5 22 248 150 47,5 M20 2,519,5 24 281 160 51,53M22 2,521 26 286 165 56,5 M24 324 30 296 175 62,5 M27 326,5 33 334 185 70 4 M30 3,53.3 Subland twist drill with cylindrical shankThe dimensions for subland twist drills with cylindrical shanks shall be in accordance wit
23、h the dimensions shown in Figure 2 and given in Table 2.aOptional recess.Figure 2 Subland twist drill with cylindrical shank2 ISO 2013 All rights reservedBS ISO 3438:2013ISO 3438:2013(E)Table 2 Dimensions of subland twist drill with cylindrical shank prior to tapping metric screw threadsd1h8d2h8l1l2
24、l3Thread2,5 3,4 70 39 8,8 M3 0,53,3 4,5 80 47 11,4 M4 0,74,2 5,5 93 57 13,6 M5 0,85 6,6 101 63 16,5 M6 16,8 9 125 81 21 M8 1,258,5 11 142 94 25,5 M10 1,510,2 13,5 160 108 30 M12 1,7512 15,5 178 120 34,5 M14 2 ISO 2013 All rights reserved 3BS ISO 3438:2013ISO 3438:2013(E)Annex A (informative) Relatio
25、nship between the symbols of this International Standard and the ISO 13399 seriesA.1 Relationship between symbolsFor the relationship between the symbols of this International Standard and symbols according to the ISO 13399 series, see Table A.1.Table A.1 Relationship between symbols in this Interna
26、tional Standard and the ISO 13399 seriesSymbol in ISO 3438 (this International Standard)Reference in ISO 3438 (this International Standard)Property name in the ISO 13399 seriesSymbol in the ISO 13399 seriesISO 13399 series BSU coded1Figures 1 and 2Cutting diam-eterDCONISO/TS 13399-3 71CF29862B277d2F
27、igures 1 and 2Cutting diam-eterDCONISO/TS 13399-3 71CF29862B277l1Figures 1 and 2 Overall length OALISO/TS 13399-3 71D078EB7C086l2Figures 1 and 2Length chip fluteLCFISO/TS 13399-3 71DCD39338974l3Figures 1 and 2Step diameter lengthSDLISO/TS 13399-3 71D078F5BEDBE4 ISO 2013 All rights reservedBS ISO 343
28、8:2013ISO 3438:2013(E)Bibliography1 ISO 13399-1, Cutting tool data representation and exchange Part 1: Overview, fundamental principles and general information model2 ISO/TS 13399-2, Cutting tool data representation and exchange Part 2: Reference dictionary for the cutting items3 ISO/TS 13399-3, Cut
29、ting tool data representation and exchange Part 3: Reference dictionary for tool items4 ISO/TS 13399-4, Cutting tool data representation and exchange Part 4: Reference dictionary for adaptive items5 ISO/TS 13399-5, Cutting tool data representation and exchange Part 5: Reference dictionary for assemb
30、ly items6 ISO 13399-50, Cutting tool data representation and exchange Part 50: Reference dictionary for reference systems and common concepts7 ISO 13399-60, Cutting tool data representation and exchange Part 60: Reference dictionary for connection systems8 ISO 13399-100, Cutting tool data representa
31、tion and exchange Part 100: Definitions, principles and methods for reference dictionaries9 ISO 13399-150, Cutting tool data representation and exchange Part 150: Usage guidelines ISO 2013 All rights reserved 5BS ISO 3438:2013ISO 3438:2013(E) ISO 2013 All rights reservedICS 25.100.30Price based on 5
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