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1、BRITISH STANDARD BS EN ISO 6789:2003 Incorporating Corrigendum No. 1 Assembly tools for screws and nuts Hand torque tools Requirements and test methods for design conformance testing, quality conformance testing and recalibration procedure The European Standard EN ISO 6789:2003 has the status of a B
2、ritish Standard ICS 25.140.30 ? BS EN ISO 6789:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 11 April 2003 BSI 4 August 2003 ISBN 0 580 41574 0 National foreword This British Standard is the official English language version of EN ISO
3、6789:2003. It is identical with ISO 6789:2003. It supersedes BS EN 26789:1994 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MTE/15/13, Assembly tools for screws and nuts, pliers and nippers, which has the responsibility to: A list of organizations r
4、epresented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence In
5、dex”, 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 does not of itself co
6、nfer 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 developments and promul
7、gate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 15, an inside back cover and a back cover. The BSI copyright date displayed in this documen
8、t indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments 14608 Corrigendum No. 1 4 August 2003 Replacing the EN ISO foreword page EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6789 April 2003 ICS 25.140.30Supersedes EN 26789:1994 English ver
9、sion Assembly tools for screws and nuts - Hand torque tools - Requirements and test methods for design conformance testing, quality conformance testing and recalibration procedure (ISO 6789:2003) Outils de manoeuvre pour vis et crous - Outils dynamomtriques commande manuelle - Exigences et mthodes d
10、essai pour vrifier la conformit de conception, la conformit de qualit et la procdure de rtalonnage (ISO 6789:2003) Schraubwerkzeuge - Handbettigte Drehmoment- Werkzeuge - Anforderungen und Prfverfahren fr die Typprfung, Annahmeprfung und das Rekalibrierverfahren (ISO 6789:2003) This European Standar
11、d was approved by CEN on 24 March 2003. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such
12、 national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and
13、 notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia,
14、 Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN natio
15、nal Members. Ref. No. EN ISO 6789:2003 E CORRECTED 2003-07-16 Foreword This document (EN ISO 6789:2003) has been prepared by Technical Committee ISO/TC 29 “Small tools“ in collaboration with CMC. This European Standard shall be given the status of a national standard, either by publication of an ide
16、ntical text or by endorsement, at the latest by October 2003, and conflicting national standards shall be withdrawn at the latest by October 2003. This document supersedes EN 26789:1994. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countrie
17、s are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text o
18、f ISO 6789:2003 has been approved by CEN as EN ISO 6789:2003 without any modifications. EN ISO 6789:2003 Reference number ISO 6789:2003(E) INTERNATIONAL STANDARD ISO 6789 Third edition 2003-04-01 Assembly tools for screws and nuts Hand torque tools Requirements and test methods for design conformanc
19、e testing, quality conformance testing and recalibration procedure Outils de manuvre pour vis et crous Outils dynamomtriques commande manuelle Exigences et mthodes dessai pour vrifier la conformit de conception, la conformit de qualit et la procdure de rtalonnage EN ISO 6789:2003 IS:9876 O3002(E) DP
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24、fo yr ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o gro ii EN ISO 6789:2003 iii Contents Page Forewordiv Introduction v 1 Scope1 2 Normative references .1 3 Terms and definitions.1 4 Classifi
25、cation.2 5 Requirements 2 5.1 Design conformance testing2 5.2 Quality conformance testing4 5.3 Recalibration .4 6 Calibration5 6.1 Calibration device .5 6.2 Calibration temperature5 6.3 Calibration conditions5 6.4 Calibration sequence8 6.5 Calibration examples8 7 Marking.11 Annex A (normative) Indic
26、ating torque tools: Type I12 Annex B (normative) Setting torque tools: Type II13 Bibliography .15 EN ISO 6789:2003 iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Stan
27、dards is 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 t
28、ake part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) 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
29、is to prepare International Standards. Draft International Standards adopted by the technical committees 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 possibil
30、ity 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 rights. ISO 6789 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 10, Assembly tools for screw and nuts, pliers and
31、nippers. This third edition cancels and replaces the second edition (ISO 6789:1992), which has been technically revised, in particular by the addition of a new Clause 3, subclauses 5.1, 5.2 and 5.3, Figure 3 and Figure B.7. Further, Figures 1 and 2 have been revised. EN ISO 6789:2003 v Introduction
32、The revision of the previous edition of ISO 6789 became necessary, because the requirements of ISO 9001, concerning the procedure of the control of test devices, as well as the introduction of calibration services, unambiguously need guidelines in ISO 6789 for calibration and recalibration of hand t
33、orque tools. Further, information about recalibration has been included in the present new issue. EN ISO 6789:2003 INTENRATIONAL TSANDADR IS:9876 O3002(E) Assembly tools for screws and nuts Hand torque tools Requirements and test methods for design conformance testing, quality conformance testing an
34、d recalibration procedure 1 Scope This International Standard specifies the requirements for, and describes the test methods and marking of, hand torque tools used for controlled tightening of bolted connections. It applies to torque tools in accordance with Clause 4, in particular to indicating and
35、 setting torque wrenches in accordance with numbers 258 and 259 of ISO 1703:1983. 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 references, the latest edition of the
36、referenced document (including any amendments) applies. GUM, Guide for evaluation of uncertainty in measurement 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 design conformance testing those requirements to be met during design or modificat
37、ion of hand torque tools (see 5.1) 3.2 quality conformance testing those requirements to be met during manufacture of hand torque tools (see 5.2) 3.3 calibration set of operations that establish, under specified conditions, the relationship between values of quantities indicated by a measuring instr
38、ument or measuring system, or values represented by a material measure or a reference material, and the corresponding values realized by standards VIM:1993, definition 6.11 NOTE For the specific purposes of this International Standard, the following definition may apply: set of operations that estab
39、lish, under specified conditions, the relationship between values indicated or signalled by a torque tool, and the corresponding values indicated by a calibration device 3.4 recalibration those requirements to be met during calibration of hand torque tools after a defined period of use (see 5.3) EN
40、ISO 6789:2003 1 3.5 indicating torque tool (Type I) tool that indicates by means of a mechanical scale, dial or electronic display, the value of torque exerted by the tool at the output drive 3.6 setting torque tool (Type II) tool that is pre-set to a certain torque value, so that, when the prescrib
41、ed value of torque is exerted by the tool at the output drive, a signal is released (e.g. audibly, visibly, perceptibly) 3.6.1 adjustable graduated torque tool (Type II, Class A, Class D and Class G) tool designed to be adjusted by the user, which has a scale or a display to assist adjustment 3.6.2
42、adjustable non-graduated torque tool (Type II, Class C and Class F) tool designed to be adjusted by the user with the aid of a calibration device 3.6.3 torque tool with fixed adjustment (Type II, Class B and Class E) tool not designed to be adjusted by the user, i.e. having a single setting 3.7 cali
43、bration device device used for the calibration of torque tools 4 Classification The hand torque tools to which this International Standard applies are classified as follows: a) Type I: Indicating torque tools (see Annex A) Class A: wrench, torsion or flexion bar Class B: wrench, rigid housing, with
44、scale or dial or display Class C: wrench, rigid housing and electronic measurement Class D: screwdriver, with scale or dial or display Class E: screwdriver, with electronic measurement b) Type II: Setting torque tools (see Annex B) Class A: wrench, adjustable, graduated or with display Class B: wren
45、ch, fixed adjustment Class C: wrench, adjustable, non-graduated Class D: screwdriver, adjustable, graduated or with display Class E: screwdriver, fixed adjustment Class F: screwdriver, adjustable, non-graduated Class G: wrench, flexion bar, adjustable, graduated 5 Requirements 5.1 Design conformance
46、 testing 5.1.1 General The manufacturer shall test samples of wrenches in order to verify they are in conformity with 5.1.2 to 5.1.7. EN ISO 6789:2003 2 5.1.2 Assignment of the driving square The size of the driving square is a function of the maximum torque value of the respective torque tool. The
47、assignment is carried out according to the values given in Table 1. Table 1 Assignment of the driving square Maximum torque value Driving square nominal sizea Nm mm 0030 6,3 0135 10 0340 12,5 1 000 20 2 100 25 a In accordance with ISO 1174-1. 5.1.3 Specified measuring range The requirements and test
48、 methods in this International Standard cover a specified measuring range from 20 % to 100 % of the maximum torque value of the respective tool. The scales of torque tools of Type I shall be marked with a zero position. 5.1.4 Scales The increment between two graduation marks of a scale shall not exc
49、eed 5 % of the maximum value. 5.1.5 Tolerances 5.1.5.1 Indicating torque tools (Type I) Permissible deviation of the torque value indicated by the tool, from the simultaneous indication of the calibration device, shall be as given in Table 2. Table 2 Permissible deviation (Type I) Maximum torque value Classa u 10 Nm 10 Nm A and D 6 % B, C and E 6 % 4 % a In the case of torque tools with electronic measurement (Class C