1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 14405-2:2011Geometrical productspecifications (GPS) Dimensional tolerancingPart 2: Dimensions other than linear sizes(ISO 14405-2:2011)BS EN ISO 14405-2:2011 BRITISH ST
2、ANDARDNational forewordThis British Standard is the UK implementation of EN ISO14405-2:2011. It supersedes BS ISO 406:1987 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee TDW/4, Technical Product Realization.A list of organizations represented on this c
3、ommittee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 67292 7ICS 17.040.10Compliance with a British Standard cannot confer immunity fromlegal
4、 obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14405-2 December 2011 ICS 17.040.10 English Version Geo
5、metrical product specifications (GPS) - Dimensional tolerancing - Part 2: Dimensions other than linear sizes (ISO 14405-2:2011) Spcification gomtrique des produits (GPS) - Tolrancement dimensionnel - Partie 2: Dimensions autres que les tailles linaires (ISO 14405-2:2011) Geometrische Produktspezifik
6、ation (GPS) - Geometrische Tolerierung - Teil 2: Andere als lineare Mae (ISO 14405-2:2011) This European Standard was approved by CEN on 15 October 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta
7、tus of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, G
8、erman). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croa
9、tia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDI
10、ZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14405-2:2011: EBS EN ISO 14405-2:2011EN ISO 14405-2:
11、2011 (E) 3 Foreword This document (EN ISO 14405-2:2011) has been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specifications and verification“ in collaboration with Technical Committee CEN/TC 290 “Dimensional and geometrical product specification and verification”
12、the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2012, and conflicting national standards shall be withdrawn at the latest by June 2012. Attention is
13、 drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the fol
14、lowing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slo
15、vakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 14405-2:2011 has been approved by CEN as a EN ISO 14405-2:2011 without any modification. BS EN ISO 14405-2:2011ISO 14405-2:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduc
16、tion . v 1 Scope 1 2 Normative references 1 3 Terms and definitions . 2 4 Principles and rules for indication of dimensions and related tolerances . 3 5 Units used in drawings for dimensions 4 6 Indication of tolerances for linear and angular dimensions . 4 7 Illustrations of ambiguous tolerancing v
17、s. unambiguous geometrical tolerancing . 4 7.1 General . 4 7.2 Linear distance between two integral features 5 7.3 Linear distance between an integral and a derived feature 7 7.4 Linear distance between two derived features 8 7.5 Radius dimension 9 7.6 Linear distance between non-planar integral fea
18、tures 9 7.7 Linear distance in two directions 10 8 Angular tolerancing . 11 8.1 Plus/minus tolerancing applied to angular distance . 11 8.2 Examples of geometrical tolerancing applied to angular distance between two integral features . 12 8.3 Angular distance between an integral feature and a derive
19、d feature 13 Annex A (informative) Explanations and examples of the ambiguity caused by using tolerances for dimensions other than linear size 14 Annex B (informative) Relation to the GPS matrix model . 21 Bibliography 23 BS EN ISO 14405-2:2011ISO 14405-2:2011(E) iv ISO 2011 All rights reservedForew
20、ord 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 subject for which a techni
21、cal 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 (IEC) on all matters of e
22、lectrotechnical 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 committees are circulated to
23、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 held responsible for i
24、dentifying any or all such patent rights. ISO 14405-2 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product specifications and verification. This first edition of ISO 14405-2 cancels and replaces ISO 406:1987. ISO 14405 consists of the following parts, under the general
25、 title Geometrical product specifications (GPS) Dimensional tolerancing: Part 1: Linear sizes Part 2: Dimensions other than linear sizes BS EN ISO 14405-2:2011ISO 14405-2:2011(E) ISO 2011 All rights reserved vIntroduction This part of ISO 14405 is a geometrical product specification (GPS) standard a
26、nd is to be regarded as a general GPS standard (see ISO/TR 14638). In the general GPS matrix, it influences chain link 1 in the distance and radius chains of standards and chain links 1, 2 and 3 in the angle chain of standards. The ISO/GPS Masterplan given in ISO/TR 14638 gives an overview of the IS
27、O/GPS system of which this document is a part. The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and the default decision rules given in ISO 14253-1 apply to specifications made in accordance with this document, unless otherwise indicated. For dimensions other than linear siz
28、es, the requirement is ambiguous when applied to the real workpiece. It is the presence of form and angular deviations on all real workpieces that makes these requirements ambiguous, i.e. there is a specification ambiguity. It has to be realized that this specification ambiguity can only be avoided
29、for features of size toleranced in accordance with ISO 14405-1. For all other dimensions, geometrical tolerancing should be used in order to control the specification ambiguity. For more detailed information on the relation of this part of ISO 14405 to other standards and to the GPS matrix model, se
30、e Annex B. BS EN ISO 14405-2:2011BS EN ISO 14405-2:2011INTERNATIONAL STANDARD ISO 14405-2:2011(E) ISO 2011 All rights reserved 1Geometrical product specifications (GPS) Dimensional tolerancing Part 2: Dimensions other than linear sizes 1 Scope This part of ISO 14405 illustrates the use of geometrica
31、l tolerancing for dimensions that are not linear sizes to avoid the ambiguity that the use of tolerances on these dimensions causes. Both linear and angular dimensions, except size of features of size are covered. Dimensional tolerancing can be indicated by tolerancing or geometrical tolerancing. Th
32、e ambiguity caused by using tolerances for dimensions other than linear sizes (for individual tolerances and general tolerances according to, e.g. ISO 2768-1 and ISO 8062-3) is explained in Annex A. NOTE 1 The figures, as shown in this part of ISO 14405, merely illustrate the text and are not intend
33、ed to reflect actual usage. The figures are consequently simplified to indicate only the relevant principles. NOTE 2 For indications of size tolerances, see the following: ISO 14405-1 for linear size; ISO 2538 for wedges; ISO 3040 for cones. NOTE 3 The rules for geometrical tolerancing are given in
34、ISO 1101. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the cited editions apply. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 129-1:1), Tec
35、hnical drawings Indication of dimensions and tolerances Part 1: General principles ISO 286-1:2010, Geometrical product specifications (GPS) ISO code system for tolerances on linear sizes Part 1: Basis of tolerances, deviations and fits ISO 2538:1998, Geometrical Product Specifications (GPS) Series o
36、f angles and slopes on prisms ISO 1101:2), Geometrical Product Specifications (GPS) Geometrical tolerancing Tolerances of form, orientation, location and run-out 1) To be published. (Revision of ISO 129-1:2004) 2) To be published. (Revision of ISO 1101:2004) BS EN ISO 14405-2:2011ISO 14405-2:2011(E)
37、 2 ISO 2011 All rights reservedISO 8015:2011, Geometrical product specifications (GPS) Fundamentals Concepts, principles and rules ISO 13715:2000, Technical drawings Edges of undefined shape Vocabulary and indications ISO 14405-1:2010, Geometrical product specifications (GPS) Dimensional tolerancing
38、 Linear sizes ISO 14660-1:1999, Geometrical Product Specifications (GPS) Geometrical features Part 1: General terms and definitions ISO 14660-2:1999, Geometrical Product Specifications (GPS) Geometrical features Part 2: Extracted median line of a cylinder and a cone, extracted median surface, local
39、size of an extracted feature ISO 17450-1:3 ), Geometrical product specifications (GPS) General concepts Part 1: Model for geometrical specification and verification ISO 17450-2:4 ), Geometrical product specifications (GPS) General concepts Part 2: Basic tenets, specifications, operators, uncertainti
40、es and ambiguities 3 Terms and definitions For the purpose of this document, the terms and definitions given in ISO 129-1, ISO 1101, ISO 8015, ISO 13715, ISO 14405-1, ISO 14660-1, ISO 14660-2, ISO 17450-1, ISO 17450-2 and the following apply. The term “drawing” is used in this part of ISO 14405 as a
41、 synonym for the 2D drawing, the 3D model and other representations of the workpiece. 3.1 tolerancing tolerancing using dimension and indication of limit deviations, dimension limit values or unilateral dimension limit NOTE The sign should not be understood in a way that the limit deviations are alw
42、ays symmetrical to the nominal size. 3.2 linear size dimension in length units characterizing a feature of size 3.3 angular size dimension in angle units characterizing a feature of size 3.4 distance dimension between two geometrical features which are not considered as a feature of size NOTE 1 Dist
43、ance can be between two integral features or an integral feature and a derived feature or two derived features. NOTE 2 Linear distance and angular distance exist. 3.4.1 linear distance distance in length units 3) To be published. (Revision of ISO/TS 17450-1:2005) 4) To be published. (Revision of ISO
44、/TS 17450-2:2002) BS EN ISO 14405-2:2011ISO 14405-2:2011(E) ISO 2011 All rights reserved 33.4.2 angular distance distance in angle units 4 Principles and rules for indication of dimensions and related tolerances The general rules and principles for indicating tolerances given in ISO 14405-1 apply to
45、 this part of ISO 14405 and are the basis for tolerancing on mechanical engineering drawings. In all other cases, special rules apply. For rules on the indication of units, see Clause 5. For dimensions other than linear sizes, a requirement with tolerancing is ambiguous (specification ambiguity) whe
46、n applied to a real workpiece. This type of specification is not recommended; see Annex A. Specification ambiguity can only be avoided for linear sizes toleranced in accordance with ISO 14405-1. In order to control specification ambiguity, geometrical tolerancing shall be used. Unless otherwise spec
47、ified, e.g. by using CZ according to ISO 1101 or according to ISO 2692, tolerances on mechanical engineering drawings are independent requirements without any relationships to other requirements for the same feature(s). This is the independency principle (see ISO 8015). Several types of dimensions e
48、xist in the nominal model of the workpiece (see Table 1). Table 1 Types of dimensions Characterization, type and number of features Type of dimension Details in Dimension Linear dimension (length units) One feature Integral only features of size Linear size ISO 14405-1 Integral or derived Radius dim
49、ension 7.5, A.6, A.7 Integral or derived Arc length A.12 Two features Integral integral Facing the same direction Linear distance or step height 7.2, A.2 Facing the opposite direction Linear distance 7.2, 7.6, A.3, A.8 Integral derived Linear distance 7.3, 7.7, A.4, A.9 Derived derived Linear distance 7.4, A.5 Edge (transition region between two integral features) Integral Chamfer shape Chamfer height and angle A.11 Rounding shape Edge radius A.11 Angular dimens
