1、BS ISO 2284:2017Hand taps for parallel andtaper pipe threads Generaldimensions and markingBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 2284:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 2284:2017. It supersedes
2、BS 949-3:1993 which is withdrawn.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 t
3、o include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 90907 8 ICS 25.100.50Compliance with a British Standard cannot confer immunity from legal obligations.
4、This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 2284:2017 ISO 2017Hand taps for parallel and taper pipe threads General dimensions and markingTarau
5、ds main pour filetages cylindrique et conique de tuyauterie Dimensions gnrales et marquageINTERNATIONAL STANDARDISO2284Fourth edition2017-02Reference numberISO 2284:2017(E)BS ISO 2284:2017ISO 2284:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAl
6、l 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 requested f
7、rom 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 2284:2017ISO 2284:2017(E)Foreword iv1 Scope . 12 Normat
8、ive references 13 Terms and definitions . 14 General dimensions. 15 Marking 2Annex A (informative) Bases for calculation of the dimensions 5Annex B (informative) Relationship between designations in this document and the ISO 13399 series . 6Bibliography 7 ISO 2017 All rights reserved iiiContents Pag
9、eBS ISO 2284:2017ISO 2284:2017(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 technical committees. Each member body inter
10、ested 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 closely with the International Electrotechnical
11、 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 needed for the different types of ISO docume
12、nts 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 rights. ISO shall not be held responsi
13、ble 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 this document is information given
14、for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature 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) principle
15、s in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 9, Tools with defined cutting edges, cutting items.This fourth edition cancels and replaces the third edition
16、 (ISO 2284:1987), of which it constitutes a minor revision with the following changes: added Annex B giving the relationship between the symbols of this document and the symbols according to the ISO 13399 series.iv ISO 2017 All rights reservedBS ISO 2284:2017INTERNATIONAL STANDARD ISO 2284:2017(E)Ha
17、nd taps for parallel and taper pipe threads General dimensions and marking1 ScopeThis document specifies the general dimensions and marking of hand taps for pipe threads.It is applicable to the two following types of tap: taps for parallel threads (see Figure 1 and Table 1), taps for taper threads (
18、see Figure 2 and Table 2),having threads in accordance with ISO 7-1 and ISO 228-1.Furthermore, it gives in Annex A the bases used for calculation of the dimensions, and in Annex B the relationship between designations in this document and the ISO 13399 series.2 Normative referencesThe following docu
19、ments 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, the latest edition of the referenced document (including any amendments) applies.ISO 237, Rotatin
20、g tools with parallel shanks Diameters of shanks and sizes of driving squaresISO 5969, Ground thread taps for pipe threads G series and Rp series Tolerances on the threaded portion3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological database
21、s for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp4 General dimensionsThe general dimensions are given in Table 1 and Table 2.Shank diameters and driving s
22、quares shall conform to the specifications given in ISO 237, the tolerances being as follows: on diameter, d1:h9 for precision shanks;h11 for other shanks; on width across flats, a:h11;h12 (including errors of form of the square and of its position in relation to the shank). ISO 2017 All rights rese
23、rved 1BS ISO 2284:2017ISO 2284:2017(E)5 MarkingTaps in accordance with this document and with the requirements of ISO 5969 shall be marked, on the shank, with the following indications:a) the letter designating the thread series;b) the designation of the thread.A G series parallel thread tap with de
24、signation 3/4 shall be marked as follows:G 3/4An Rp series parallel thread tap with designation 1/4 shall be marked as follows:Rp 1/4An Rc series taper thread tap with designation 1 shall be marked as follows:Rc 1Where tools comply in all respects with the relevant International Standards, the symbo
25、l ISO may be appended to the mark at the discretion of the manufacturer.Figure 1 Tap for parallel threads G series and Rp series2 ISO 2017 All rights reservedBS ISO 2284:2017ISO 2284:2017(E)Table 1 Taps for parallel threads G series and Rp seriesDimensions in millimetresThread designationNumber of t
26、hreads in 25,4 mmd nom.Pitch d1h9l +2 1LSquarea h11l21/16 28 7,7230,9075,6 14 52 4,5 71/8 28 9,728 8 15 59 6,3 91/4 19 13,1571,33710 19 67 8 113/8 19 16,662 12,5 21 75 10 131/2 14 20,9551,814162687 12,5 16(5/8) 14 22,911 18 91 14 183/4 14 26,441 20 28 96 16 20( 7/8) 14 30,201 22,4 29 102 18 221 11 3
27、3,2492,30925 33 109 20 241 1/4 11 41,91 31,5 36 119 25 281 1/2 11 47, 80335,537 12528 31(1 3/4) 11 53,746 39 1322 11 59,6144041 14031,5 34(2 1/4) 11 65,71 42 1422 1/2 11 75,184 45 45 153 35,5 383 11 87, 884 50 48 164 40 423 1/2 11 100,33 63 50 173 50 514 11 113,03 71 53 185 56 56NOTE The sizes shown
28、 in parentheses are to be avoided whenever possible. ISO 2017 All rights reserved 3BS ISO 2284:2017ISO 2284:2017(E)Figure 2 Tap for taper threads Rc seriesTable 2 Taps for taper threads Rc seriesDimensions in millimetresThread designationNumber of threads in 25,4 mmd nom.Pitch d1h9l +2 1Ll1max.Squar
29、ea h11l21/16 28 7,7230,9075,6 14 5210,14,5 71/8 28 9,728 8 15 59 6,3 91/4 19 13,1571,33710 19 67 15 8 113/8 19 16,662 12,5 21 75 15,4 10 131/2 14 20,9551,81416 26 87 20,5 12,5 163/4 14 26,441 20 28 96 21,8 16 201 11 33,2492,30925 33 109 26 20 241 1/4 11 41,91 31,5 36 119 28,3 25 281 1/2 11 47, 803 3
30、5,5 37 125 28,3 28 312 11 59,614 40 41 140 32,7 31,5 342 1/2 11 75,184 45 45 153 37,1 35,5 383 11 87, 884 50 48 164 40,2 40 423 1/2 11 100,33 63 50 173 41,9 50 514 11 113,03 71 53 185 46,2 56 564 ISO 2017 All rights reservedBS ISO 2284:2017ISO 2284:2017(E)Annex A (informative) Bases for calculation
31、of the dimensionsA.1 GeneralThis document has been prepared on the basis of empirical formulae extracted from standards and existing practice in various countries, and by taking ISO 529 into consideration.A.2 Threaded lengthThe threaded length consists of the entering length and the full thread leng
32、th. We therefore have Formula (A.1):5 p + 3,08 d0,55(A.1)The first term of this formula corresponds to the maximum entering length of threads.A.3 Shank lengthThe shank length consists of the “free” length (outside the tap holder) of the shank, that length supposed to be absorbed by the clamp of the
33、tapping machine and the length of the driving square; we therefore have Formula (A.2):(6,3 d0,45) + (10 d10,25) + l2(A.2)The first term of this formula corresponds to the free length, the second to the length absorbed by the clamp and the third to the length of the square. ISO 2017 All rights reserv
34、ed 5BS ISO 2284:2017ISO 2284:2017(E)Annex B (informative) Relationship between designations in this document and the ISO 13399 seriesFor the relationship between the designations in this document and preferred symbols according to the ISO 13399 series, see Table B.1.Table B.1 Relationship between de
35、signations in this document and the ISO 13399 seriesSymbol in this documentReference in this documentProperty name in the ISO 13399 seriesSymbol in the ISO 13399 seriesReference in the ISO 13399 seriesThreadTable 1 Table 2thread diameter, inch fractionTDFR 726E3EACB6BE4Number of threads in 25,4 mmTa
36、ble 1 Table 2threads per inch TPI 71D1A6AAC8707d1Table 1 Table 2connection diameter machine sideDCONMS 71EBDBF5060E6d1h9Table 1 Table 2tolerance class connection diameter machine sideTCDCONMS 72719B2BD8041lTable 1 Table 2thread cutting part length THL 71E02C65BB9DALTable 1 Table 2overall length OAL
37、71D078EB7C086PitchTable 1 Table 2thread pitch TP 71CEAEC08D4B06 ISO 2017 All rights reservedBS ISO 2284:2017ISO 2284:2017(E)Bibliography1 ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation2 ISO 228-1, Pipe threads where pressure-t
38、ight joints are not made on the threads Part 1: Dimensions, tolerances and designation3 ISO 529, Short machine taps and hand taps4 ISO 13399 (all parts), Cutting tool data representation and exchange ISO 2017 All rights reserved 7BS ISO 2284:2017ISO 2284:2017(E) ISO 2017 All rights reservedICS 25.10
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