1、BS EN ISO286-1:2010ICS 17.040.10; 21.020NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDGeometrical productspecifications (GPS) ISO code system fortolerances on linearsizesPart 1: Basis of tolerances, deviationsand fits (ISO 286-1:2010)BS EN ISO286-1:2010Incorpo
2、rating corrigendum August 2013BS EN ISO 286-1:2010ISBN 978 0 580 84035 7Amendments/corrigenda issued since publicationDate Comments31 August 2013 Implementation of ISO corrigendum August 2013This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31
3、May 2010. The British Standards Institution 2013. Published by BSI Standards Limited 2013National forewordThis British Standard is the UK implementation of EN ISO 286-1:2010. It is identical to ISO 286-1:2010, incorporating corrigendum August 2013. It supersedes BS EN 20286-1:1993 which is withdrawn
4、.The start and finish of text introduced or altered by corrigendum is indicated in the text by tags. Text altered by ISO corrigendum August 2013 is indicated in the text by .The UK participation in its preparation was entrusted to Technical Committee TDW/4, Technical Product Realization.A list of or
5、ganizations represented on this committee can be obtained on request to its secretary.The 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 cannot confer immunity from legal obligat
6、ions.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 286-1 April 2010 ICS 17.040.10 Supersedes EN 20286-1:1993English Version Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 1: Basis of tolerances, deviations and fits (ISO 286-1:2010) Spcific
7、ation gomtrique des produits (GPS) - Systme de codification ISO pour les tolrances sur les tailles linaires - Partie 1: Base des tolrances, carts et ajustements (ISO 286-1:2010) Geometrische Produktspezifikation (GPS) - ISO-Toleranzsystem fr Lngenmae - Teil 1: Grundlagen fr Toleranzen, Abmae und Pas
8、sungen (ISO 286-1:2010) This European Standard was approved by CEN on 6 February 2010. 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
9、 and bibliographical references concerning such national standards may be obtained on application to the CEN 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 respo
10、nsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hu
11、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Cen
12、tre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 286-1:2010: EBS EN ISO 286-1:2010EN ISO 286-1:2010 (E) 3 Foreword This document (EN ISO 286-1:2010) has been prepared by Technical Comm
13、ittee 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” the secretariat of which is held by AFNOR. This European Standard shall be given the status
14、 of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2010, and conflicting national standards shall be withdrawn at the latest by October 2010. Attention is drawn to the possibility that some of the elements of this document may be the subje
15、ct of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 20286-1:1993. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement thi
16、s 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, Slovakia, Slovenia, Spain, Sweden, Switzerland
17、 and the United Kingdom. Endorsement notice The text of ISO 286-1:2010 has been approved by CEN as a EN ISO 286-1:2010 without any modification. BS EN ISO 286-1:2010ISO 286-1:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and
18、 definitions .1 3.1 Basic terminology .2 3.2 Terminology related to tolerances and deviations 2 3.3 Terminology related to fits .5 3.4 Terminology related to the ISO fit system 9 4 ISO code system for tolerances on linear sizes.11 4.1 Basic concepts and designations .11 4.2 Designation of the tolera
19、nce class (writing rules) .13 4.3 Determination of the limit deviations (reading rules)14 4.4 Selection of tolerance classes .26 5 ISO fit system.26 5.1 General .26 5.2 Generics of fits 27 5.3 Determination of a fit.27 Annex A (informative) Further information about the ISO system of limits and fits
20、 and former practice.29 Annex B (informative) Examples of the use of ISO 286-1 to determine fits and tolerance classes .31 Annex C (informative) Relationship to the GPS matrix model .36 Bibliography38 BS EN ISO 286-1:2010ISO 286-1:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Int
21、roduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 3.1 Basic terminology .2 3.2 Terminology related to tolerances and deviations 3.3 rel ted to fits .5 3.4 rel ted to the ISO fit system 9 4 ISO code system for tolerances on linear sizes.11 4.1 Basic concepts and designations . 4
22、.2 Designation of the tolerance class (writing rules) .13 4.3 Determination of the limit deviations (reading rules)14 4.4 Selection of tolerance classes .26 5 ISO fit system.26 5.1 General . 5.2 nerics of fits 27 5.3 Determination of a fit. Annex A (informative) Further information about the ISO sys
23、tem of limits and fits and former practice.29 Annex B (informative) Examples of the use of ISO 286-1 to determine fits and tolerance classes .31 Annex C (informative) Relationship to the GPS matrix model .36 Bibliography38 ivBS EN ISO 286-1:2010ISO 286-1:2010(E) iv ISO 2010 All rights reservedForewo
24、rd 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 technic
25、al 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 el
26、ectrotechnical 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 t
27、he 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 id
28、entifying any or all such patent rights. ISO 286-1 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product specifications and verification. This second edition of ISO 286-1 cancels and replaces ISO 286-1:1988 and ISO 1829:1975, which have been technically revised. ISO 286
29、 consists of the following parts, under the general title Geometrical product specifications (GPS) ISO code system for tolerances on linear sizes: Part 1: Basis of tolerances, deviations and fits Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts BS EN ISO 286-1:20
30、10ISO 286-1:2010(E) ISO 2010 All rights reserved vIntroduction This International Standard is a geometrical product specification (GPS) standard and is to be regarded as a general GPS standard (see ISO/TR 14638). It influences chain links 1 and 2 of the chain of standards on size in the general GPS
31、matrix. For more detailed information on the relation of this part of ISO 286 to the GPS matrix model, see Annex C. The need for limits and fits for machined workpieces was brought about mainly by the requirement for interchange ability between mass produced parts and the inherent inaccuracy of manu
32、facturing methods, coupled with the fact that “exactness” of size was found to be unnecessary for the most workpiece features. In order that fit function could be satisfied, it was found sufficient to manufacture a given workpiece so that its size lay within two permissible li its, i.e. a tolerance,
33、 this being the variation in size acceptable in manufacture while ensuring the functional fit requirements of the product. Similarly, where a specific fit condition is required between mating features of two different workpieces, it is necessary to ascribe an allowance, either positive or negative,
34、to the nominal ize to achieve the required clearance or interference. This part of ISO 286 gives the internationally accepted code system for tolerances on linear sizes. It provides a system of tolerances and deviations suitable for two features of size types:“cylinder” and “two parallel opposite su
35、rfaces”. The main intention of this code system is the fulfilment of the function fit. The terms “hole”, “shaft” and “diameter” are used to designate features of size type cylinder (e.g. for the tolerancing of diameter of a hole or shaft). For simplicity, they are also used for two parallel opposite
36、 surfaces (e.g. for the tolerancing of thickness of a key or width of a slot). The pre-condition for the application of the ISO code system for tolerances on linear sizes for the features forming a fit is that the nominal sizes of the hole and the shaft are identical. The previous edition of ISO 286
37、-1 (published in 1988) had the envelope criterion as the default association criterion for the size of a feature of size; however, ISO 14405-1 changes this default association criterion to the two-point size criterion. This means that form is no longer controlled by the default specification of size
38、. In many cases, the diameter tolerances according to this part of ISO 286 are not sufficient for an effective control of the intended function of the fit. The envelope criterion according to ISO 14405-1 may be required. In addition, the use of geometrical form tolerances and surface texture require
39、ments may improve the control of the intended function. BS EN ISO 286-1:2010INTERNATIONAL STANDARD ISO 286-1:2010(E) ISO 2010 All rights reserved 1Geometrical product specifications (GPS) ISO code system for tolerances on linear sizes Part 1: Basis of tolerances, deviations and fits 1 Scope This par
40、t of ISO 286 establishes the ISO code system for tolerances to be used for linear sizes of features of the following types: a) cylinder; b) two parallel opposite surfaces. It defines the basic concepts and the related terminology for this code system. It provides a standardized selection of toleranc
41、e classes for general purposes from amongst the numerous possibilities. Additionally, it defines the basic terminology for fits between two features of size without constraints of orientation and location and explains the principles of “basic hole” and “basic shaft”. 2 Normative references The follo
42、wing 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 referenced document (including any amendments) applies. ISO 286-21), Geometrical product specifications (GPS) ISO
43、code system for tolerances on linear sizes Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts ISO 14405-1, Geometrical product specifications (GPS) Dimensional tolerancing Part 1: Linear sizes ISO 14660-1:1999, Geometrical Product Specifications (GPS) Geometrical f
44、eatures 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 size of an extracted feature 3 Terms and definitions For the purposes of this document
45、, the terms and definitions given in ISO 14405-1 and ISO 14660-1 and the following apply. It should be noted, however, that some of the terms are defined in a more restricted sense than in common usage. 1) To be published. (Revision of ISO 286-2:1988) ISO 286-2:2010, Geometrical product specificatio
46、ns (GPS) ISO code system for tolerances on linear sizes Part 2: Tables of standard tolerance classes and limit deviations for holes and shaftsBS EN ISO 286-1:2010ISO 286-1:2010(E) 2 ISO 2010 All rights reserved3.1 Basic terminology 3.1.1 feature of size geometrical shape defined by a linear or angul
47、ar dimension which is a size ISO 14660-1:1999, definition 2.2 NOTE 1 The feature of size can be a cylinder, a sphere, two parallel opposite surfaces. NOTE 2 In former editions of international standards, such as ISO 286-1 and ISO/R 1938, the meanings of the terms “plain workpiece” and “single featur
48、es” are close to that of “feature of size”. NOTE 3 For the purpose of ISO 286, only features of size type cylinder as well as type-two parallel opposite surfaces, defined by a linear dimension, apply. 3.1.2 nominal integral feature theoretically exact integral feature as defined by a technical drawi
49、ng or by other means ISO 14660-1:1999, definition 2.3 3.1.3 hole internal feature of size of a workpiece, including internal features of size which are not cylindrical NOTE See also Introduction. 3.1.4 basic hole hole chosen as a basis for a hole-basis fit system NOTE 1 See also 3.4.1.1. NOTE 2 For the purpose of the ISO code system, a basic hole is a hole for which the lower limit deviation is zero. 3.1.5 shaft external feature of size of a workpiece, including external features of size which are not cylind
