1、BRITISH STANDARD BS ISO 3439:2003 Subland twist drills with cylindrical shanks for holes prior to tapping screw threads ICS 25.100.30 BS ISO 3439:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 September 2003 BSI 16 September 2003 ISB
2、N 0 580 42637 8 National foreword This British Standard reproduces verbatim ISO 3439:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MTE/5, Engineers rotary cutting tools of high speed steel, which has the responsibilit
3、y to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standard
4、s Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard do
5、es not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European deve
6、lopments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. A
7、mendments issued since publication Amd. No. Date CommentsINTERNATIONAL STANDARD ISO 3439 Second edition 2003-09-01 Reference number ISO 3439:2003(E) OSI 2003 Subland twist drills with cylindrical shanks for holes prior to tapping screw threads Forets tags queue cylindrique pour avant-trous de taraud
8、ageBSISO3439:2003ISO :9343(3002)E ii ISO 3002 All rithgs reresvde id FDPscalimer ThFDP si fam eliy ctnome niat deddebyepfa.sec In cacnadrociw eth sebodA sneciliycilop gn, thf siam elirp eb ytnide or viewb detu llahs ton tide ebed lnuet sst ehyfepcaa hcihw serdebme et desnecil era dedo tsni dnat no d
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10、 desuo taerct ehsi FDP fb nac elie ft ni dnuoG ehreneI lanfo relative to tf eh;eli tP ehDF-rctaenoi temaraptpo erew sremizif deorp rinti.gn Evrey t neeb sah eracakt neo rusnee ttah tf ehtius si elibaf elosu re by ISO memdob rebsei. In eht kilnuyle evtne ttah a borplem retalit gno it si f,dnuo esaelp
11、 inform thtneC eral ceSrteraiat ta teh sserdda vigoleb new. IOS 3002 Alr lithgs reresv.de sselnU toesiwreh sficep,dei rap ont fo thbup silitaciam nocudorper eb yde or tuilidez na nif yorm ro by nam ysnae, tcelerm ro cinoecinahcal, tohp gnidulcnicopom dna gniyicrfomli, tiwuoht repsimsi noin wrtif gni
12、rtie mohI reSO ta the asserdd ebwol or ISOmem sreb obyd t nitnuoc ehry fo teh euqertsre. SIc Oopyright ofifce saCe soptael 65 -HCG 1121eneva 02 Te.l 22 14 + 10 947 11 Fax + 22 14 0 9479 74 Eam-il ocpyrithgios.ogr Web wwwi.soo.rg Pubni dehsil Stiwrezldna BSISO3439:2003OSI 3433002:9)E( ISO 3002 r llAi
13、thgs reservde iii Foreword ISO (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 technical committees. Each member body interested in a sub
14、ject 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 (I
15、EC) on all matters of electrotechnical standardization. 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 commit
16、tees are circulated to the member bodies for voting. Publication 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
17、 held responsible for identifying any or all such patent rights. ISO 3439 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 2, High speed steel cutting tools and their attachments. This second edition cancels and replaces the first edition (ISO 3439:1975), which has been te
18、chnically revised, in particular in order to align with ISO 273:1979. BSISO3439:2003blank BSISO3439:2003ANRETNIITOTS LANDNADRA OSI 3433002:9)E( ISO 3002 r llAithgs reservde 1 Subland twist drills with cylindrical shanks for holes prior to tapping screw threads 1S c o p e This International Standard
19、lays down the dimensions of subland twist drills with cylindrical shanks for holes prior to tapping screw threads. The drills have been designed to produce holes prior to tapping metric threads (coarse pitch series) over a selected range of M3 to M14. This International Standard complements ISO 2306
20、. Subland twist drills with Morse taper shanks for holes prior to tapping screw threads are dealt with in ISO 3438. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated refe
21、rences, the latest edition of the referenced document (including any amendments) applies. ISO 2306, Drills for use prior to tapping screw threads ISO 2768-1, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications BSISO3439:2003ISO :9343(3002)
22、E 2 ISO 3002 All rithgs reresvde 3 Dimensions See Figure 1 and Table 1. Unless otherwise stated, these drills are right-hand cutting. a Optional recess. Figure 1 Subland twist drill with cylindrical shank Table 1 Dimensions of Subland twist drills with cylindrical shanks for holes prior to tapping m
23、etric screw threads Dimensions in millimetres aaa Thread h8 h8 3,4 2,5 70 39 8,8 M3 0,5 4,5 3,3 80 47 11,4 M4 0,7 5,5 4,2 93 57 13,6 M5 0,8 6,6 5 101 63 16,5 M6 1 9 6,8 125 81 21 M8 1,25 11 8,5 142 94 25,5 M10 1,5 13,5 10,2 160 108 30 M12 1,75 15,5 12 178 120 34,5 M14 2 a The tolerance on overall le
24、ngth and flute lengths and shall be the “very coarse” class as given in ISO 2768-1. d 2 d 1 l 1 l 2 l 3 l 1 l 2 l 3 BSISO3439:2003OSI 3433002:9)E( ISO 3002 r llAithgs reservde 3 Bibliography 1 ISO 273:1979, Fasteners Clearance holes for bolts and screws 2 ISO 3438:2003, Subland twist drills with Mor
25、se taper shanks for holes prior to tapping screw threads BSISO3439:2003BS ISO 3439:2003 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at t
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