1、BSI Standards PublicationBS EN ISO 1938-1:2015Geometrical productspecifications (GPS) Dimensional measuringequipmentPart 1: Plain limit gauges of linear sizeBS EN ISO 1938-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO1938-1:2015. It partially supers
2、edes BS 969:2008.As detailed in the ISO Foreword, ISO 1938-1:2014 cancels and replaces ISO/R 1938:1971. The ISO Foreword further details that ISO 1938:2014 does not include requirements for setting plug gauges and setting ring gauges which were dealt with in ISO/R 1938:1971. However, as the UK commi
3、ttee did not implement ISO/R 1938:1971, attention is drawn to the fact that BS 4064 and BS 4065 apply for plain setting rings.The UK participation in its preparation was entrusted to TechnicalCommittee TDW/4, Technical Product Realization.A list of organizations represented on this committee can beo
4、btained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 72158 8ICS 17.040.10Compliance wi
5、th a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUR
6、OPISCHE NORM EN ISO 1938-1 November 2015 ICS 17.040.10 English Version Geometrical product specifications (GPS) - Dimensional measuring equipment - Part 1: Plain limit gauges of linear size (ISO 1938-1:2015) Spcification gomtrique des produits (GPS) - quipement de mesure dimensionnel - Partie 1: Cal
7、ibres lisses limite de taille linaire (ISO 1938-1:2015) Geometrische Produktspezifikation (GPS) - Matolerierung - Teil 1: Grenzlehren und Lehrung der Lngenmae (ISO 1938-1:2015) This European Standard was approved by CEN on 27 April 2015. CEN members are bound to comply with the CEN/CENELEC Internal
8、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 national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
9、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 notified to the CEN-CENELEC Management Centre has the same status as the official version
10、s. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pol
11、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation
12、in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 1938-1:2015 EBS EN ISO 1938-1:2015EN ISO 1938-1:2015 (E) 3 European foreword This document (EN ISO 1938-1:2015) has been prepared by Technical Committee ISO/TC 213 “Dimensional and geometrical product specifica
13、tions 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 of a national standard, either by publication of an identical
14、text or by endorsement, at the latest by May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016. Attention is 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 f
15、or identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Form
16、er Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 1938-1
17、:2015 has been approved by CEN as EN ISO 1938-1:2015 without any modification. BS EN ISO 1938-1:2015ISO 1938-1:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 23.1 Limits . 23.2 Gauge types 33.3 Characteristics and function of gauges 64 Abbreviated terms
18、and symbols 75 Design characteristics for gauges . 86 Metrological characteristics .106.1 General 106.2 Metrological characteristic relative to the type of limit gauge (GO gauge or NO GO gauge) 107 Maximum permissible limits on metrological characteristics 147.1 General 147.2 Limit gauges for intern
19、al features of size 157.3 Limit gauges for external features of size . 167.4 Values for calculation of MPL of limit gauges 188 Proving conformance with specification for limit gauges 219 Verification of dimensional specification of a workpiece with limit gauges 2110 Marking .23Annex A (informative)
20、General principles and application of limit gauging .24Annex B (informative) Description of the specific use of the various gauge types and the associated uncertainty 26Annex C (informative) Relation to the GPS matrix model 28Bibliography .30 ISO 2015 All rights reserved iiiContents PageBS EN ISO 19
21、38-1:2015ISO 1938-1:2015(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 interested
22、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 Commi
23、ssion (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 documents sh
24、ould 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 responsible for i
25、dentifying 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 for the conv
26、enience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Forewor
27、d - Supplementary informationThe committee responsible for this document is ISO/TC 213, Geometrical product specifications and verification.This first edition cancels and replaces ISO/R 1938:1971, which has been technically revised.ISO 1938 consists of the following parts, under the general title Ge
28、ometrical product specifications (GPS) Dimensional measuring equipment : Part 1: Plain limit gauges of linear size Part 2: Reference disk gaugesThis part of ISO 1938 does not include requirements for setting plug gauges and setting ring gauges, which were dealt with in ISO/R 1938:1971, 3.9.4.This pa
29、rt of ISO 1938 covers the concepts and principles developed in ISO 14978.iv ISO 2015 All rights reservedBS EN ISO 1938-1:2015ISO 1938-1:2015(E)IntroductionThis part of ISO 1938 is a geometrical product specification (GPS) standard and is to be regarded as a general GPS standard (see ISO 14638). It i
30、nfluences chain links E, F and G of the size chain of standards in the general GPS matrix. For more detailed information of the relation of this part of ISO 1938 to other standards and the GPS matrix model, see Annex C.The ISO/GPS matrix model given in ISO 14638 gives an overview of the ISO/GPS syst
31、em 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.The terms and concepts used in this first editi
32、on of ISO 1938-1 (compared to the former edition ISO/R 1938:1971) have been changed according to needs and terminology in the other GPS standards.This part of ISO 1938 deals with verification, using plain limit gauges, of linear sizes for features of size when the dimensional specifications are requ
33、ired (see ISO 14405-1), for rigid workpieces.NOTE Tables 4 and 5 use the modifiers given in ISO 14405-1 and ISO 1101. ISO 2015 All rights reserved vBS EN ISO 1938-1:2015BS EN ISO 1938-1:2015Geometrical product specifications (GPS) Dimensional measuring equipment Part 1: Plain limit gauges of linear
34、size1 ScopeThis part of ISO 1938 specifies the most important metrological and design characteristics of plain limit gauges of linear size.This part of ISO 1938 defines the different types of plain limit gauges used to verify linear dimensional specifications associated with linear size.This part of
35、 ISO 1938 also defines the design characteristics and the metrological characteristics for these limit gauges as well as the new or wear limits state Maximum Permissible Limits (MPLs) for the new state or wear limits state for these metrological characteristics.In addition, this part of ISO 1938 des
36、cribes the use of limit gauges. It covers linear sizes up to 500 mm.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references,
37、 the latest edition of the referenced document (including any amendments) applies.ISO 286-1:2010, Geometrical product specifications (GPS) ISO code system for tolerances on linear sizes Part 1: Basis of tolerances, deviations and fitsISO 1101:2012, Geometrical product specifications (GPS) Geometrica
38、l tolerancing Tolerances of form, orientation, location and run-outISO 14405-1:2010, Geometrical product specifications (GPS) Dimensional tolerancing Part 1: Linear sizesISO 14253-1:2013, Geometrical product specifications (GPS) Inspection by measurement of workpieces and measuring equipment Part 1:
39、 Decision rules for proving conformity or nonconformity with specificationsISO 14253-2:2011, Geometrical product specifications (GPS) Inspection by measurement of workpieces and measuring equipment Part 2: Guidance for the estimation of uncertainty in GPS measurement, in calibration of measuring equ
40、ipment and in product verificationISO 17450-1:2011, Geometrical product specifications (GPS) General concepts Part 1: Model for geometrical specification and verificationISO 17450-2:2012, Geometrical product specifications (GPS) General concepts Part 2: Basic tenets, specifications, operators, uncer
41、tainties and ambiguitiesISO/IEC Guide 98-3, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)ISO/IEC Guide 99, International vocabulary of metrology Basic and general concepts and associated terms (VIM)INTERNATIONAL STANDARD ISO 1938-1:2015(E) ISO 20
42、15 All rights reserved 1BS EN ISO 1938-1:2015ISO 1938-1:2015(E)3 Terms and definitionsFor the purpose of this document, the terms and definitions given in ISO 286-1, ISO 14405-1, ISO 17450-2, ISO/IEC Guide 98-3 and ISO/IEC Guide 99 and the following definitions apply.3.1 Limits3.1.1maximum material
43、limit of sizeMMLSlimit of size corresponding to the maximum material condition of feature of sizeNote 1 to entry: MMLS includes the numerical value for the size and the specified association criteria.Note 2 to entry: A number of different association criteria for size are given in ISO 14660-2 and IS
44、O 14405-1.3.1.2least material limit of sizeLMLSlimit of size corresponding to the least material condition of feature of sizeNote 1 to entry: LMLS includes the numerical value for the size and the specified association criteria.Note 2 to entry: A number of different association criteria for size are
45、 given in ISO 14660-2 and ISO 14405-1.3.1.3upper limit of sizeULSlargest permissible size of a feature of sizeNote 1 to entry: ULS is a numerical value.SOURCE: ISO 286-1:2010, 3.2.3.13.1.4lower limit of sizeLLSsmallest permissible size of a feature of sizeNote 1 to entry: LLS is a numerical value.SO
46、URCE: ISO 286-1:2010, 3.2.3.23.1.5upper specification limitUSLlimit of a specification for a metrological characteristic of a gauge having the largest value3.1.6lower specification limitLSLlimit of a specification for a metrological characteristic of a gauge having the smallest value2 ISO 2015 All r
47、ights reservedBS EN ISO 1938-1:2015ISO 1938-1:2015(E)3.2 Gauge types3.2.1limit gaugegauge designed and intended to verify only if workpiece characteristics are inside or outside the tolerance at one of its tolerance limitsNote 1 to entry: When a limit gauge is designed to verify an internal feature
48、of size (a hole for example), then it can be called internal limit gauge.Note 2 to entry: When a limit gauge is designed to verify an external feature of size (a shaft for example), then it can be called external limit gauge.Note 3 to entry: General application of limit gauge is given in Annex A.Not
49、e 4 to entry: A limit gauge may be physical or virtual.3.2.2plain limit gaugephysical limit gauge with only one or two gauge elements, each one simulating a perfect feature of size, whose size is derived from upper or lower specification limits of the size of a feature of sizeNote 1 to entry: When a plain limit gauge consists of only one element, it is qualified as simple (simple plain limit gauge: GO plain limit gauge or NO GO plain limit gauge).Note 2 to entry: When a plain limit gauge consists of two elements
