Geometrical product specifications (GPS) - General concepts - Part 3: Toleranced features (ISO 17450-3:2016)

ISO 17450-3:2016 gives default definitions for the extracted features (integral or derived) of workpieces, which are toleranced features in GPS specifications (dimensional, geometrical, or surface texture specifications). This part of ISO 17450 defines default geometrical features used to define GPS characteristics.

Geometrische Produktspezifikation (GPS) - Grundlagen - Teil 3: Tolerierte Geometrieelemente (ISO 17450-3:2016)

Dieser Teil von ISO 17450 enthält defaultmäßige Festlegungen für die extrahierten Geometrieelemente (integrale oder abgeleitete) von Werkstücken, die in GPS-Spezifikationen (Maßspezifikation, geometrische Spezifikation oder Spezifikation der Oberflächenbeschaffenheit) als tolerierte Geometrieelemente angesehen werden.

Spécification géométrique des produits (GPS) - Concepts généraux - Partie 3: Éléments tolérancés (ISO 17450-3:2016)

ISO 17450-3:2016 donne les définitions par défaut pour les éléments (intégraux ou dérivés) extraits des pièces, qui sont des éléments tolérancés dans les spécifications GPS (spécifications dimensionnelles, géométriques, ou d'état de surface). La présente partie de l'ISO 17450 définit les éléments géométriques par défaut utilisés pour définir les caractéristiques GPS.

Specifikacija geometrijskih veličin izdelka (GPS) - Splošni pojmi - 3. del: Tolerirane značilnosti (ISO 17450-3:2016)

Ta del standarda ISO 17450 določa pridobljene značilnosti (sestavne ali izpeljane) obdelovancev, ki jih je mogoče obravnavati v specifikaciji geometrijskih veličin izdelka (GPS) (dimenzijska specifikacija, geometrijska specifikacija, specifikacija površinske strukture). Določa pogoje za privzete definicije, npr. kadar na risbi niso podani modifikatorji z razširjeno oznako značilnosti.

General Information

Status
Published
Publication Date
21-Jun-2016
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
22-Jun-2016
Completion Date
22-Jun-2016

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SLOVENSKI STANDARD
SIST EN ISO 17450-3:2016
01-september-2016
1DGRPHãþD
SIST EN ISO 14660-2:2002
SIST ISO 14660-2:2002

6SHFLILNDFLMDJHRPHWULMVNLKYHOLþLQL]GHOND *36 6SORãQLSRMPLGHO7ROHULUDQH

]QDþLOQRVWL ,62
Geometrical product specifications (GPS) - General concepts - Part 3: Toleranced
features (ISO 17450-3:2016)
Geometrische Produktspezifikation (GPS) - Grundlagen - Teil 3: tolerierte
Geometrieelemente (ISO 17450-3:2016)

Spécification géométrique des produits (GPS) - Concepts généraux - Partie 3: Éléments

tolérancés (ISO 17450-3:2016)
Ta slovenski standard je istoveten z: EN ISO 17450-3:2016
ICS:
17.040.40 6SHFLILNDFLMDJHRPHWULMVNLK Geometrical Product
YHOLþLQL]GHOND *36 Specification (GPS)
SIST EN ISO 17450-3:2016 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 17450-3:2016
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SIST EN ISO 17450-3:2016
EN ISO 17450-3
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2016
EUROPÄISCHE NORM
ICS 17.040.01
English Version
Geometrical product specifications (GPS) - General
concepts - Part 3: Toleranced features (ISO 17450-3:2016)

Spécification géométrique des produits (GPS) - Geometrische Produktspezifikation (GPS) - Grundlagen

Concepts généraux - Partie 3: Éléments tolérancés (ISO - Teil 3: Tolerierte Geometrieelemente (ISO 17450-

17450-3:2016) 3:2016)
This European Standard was approved by CEN on 19 December 2015.

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 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, 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 versions.

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, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17450-3:2016 E

worldwide for CEN national Members.
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SIST EN ISO 17450-3:2016
EN ISO 17450-3:2016 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 17450-3:2016
EN ISO 17450-3:2016 (E)
European foreword

This document (EN ISO 17450-3:2016) 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” 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 December 2016, and conflicting national standards

shall be withdrawn at the latest by December 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 for 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, Former 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 17450-3:2016 has been approved by CEN as EN ISO 17450-3:2016 without any

modification.
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SIST EN ISO 17450-3:2016
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SIST EN ISO 17450-3:2016
INTERNATIONAL ISO
STANDARD 17450-3
First edition
2016-06-01
Geometrical product specifications
(GPS) — General concepts —
Part 3:
Toleranced features
Spécification géométrique des produits (GPS) — Concepts
généraux —
Partie 3: Éléments tolérancés
Reference number
ISO 17450-3:2016(E)
ISO 2016
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SIST EN ISO 17450-3:2016
ISO 17450-3:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland

All 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 from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2016 – All rights reserved
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SIST EN ISO 17450-3:2016
ISO 17450-3:2016(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General ............................................................................................................................................................................................................................ 2

5 Default rules for establishing geometrical features ........................................................................................................ 5

5.1 General ........................................................................................................................................................................................................... 5

5.2 Integral feature ....................................................................................................................................................................................... 6

5.2.1 General...................................................................................................................................................................................... 6

5.2.2 Extracted integral line ................................................................................................................................................. 6

5.2.3 Extracted integral point ............................................................................................................................................. 6

5.2.4 Opposing point pair ........................................................................................................................................... ............ 6

5.3 Median feature ........................................................................................................................................................................................ 9

5.3.1 General...................................................................................................................................................................................... 9

5.3.2 Median point ....................................................................................................................................................................12

5.3.3 Median line ........................................................................................................................................................................15

5.3.4 Median surface ...............................................................................................................................................................16

Annex A (informative) Relation in the GPS matrix model ...........................................................................................................18

Bibliography .............................................................................................................................................................................................................................19

© ISO 2016 – All rights reserved iii
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SIST EN ISO 17450-3:2016
ISO 17450-3:2016(E)
Foreword

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 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 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 documents 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 responsible 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 for the convenience 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 ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 213, Dimensional and geometrical product

specifications and verifications.

This first edition of ISO 17450-3 cancels and replaces ISO 14660-2:1999, which has been technically

revised.

ISO 17450 consists of the following parts, under the general title Geometrical product specification

(GPS) — General concepts:
— Part 1: Model for geometrical specification and verification
— Part 2: Basic tenets, specifications, operators, uncertainties and ambiguities
— Part 3: Toleranced features

— Part 4: Geometrical characteristics for quantifying form, orientation, location and run-out deviations

iv © ISO 2016 – All rights reserved
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SIST EN ISO 17450-3:2016
ISO 17450-3:2016(E)
Introduction

This part of ISO 17450 is a geometrical product specifications (GPS) standard and is to be regarded as a

fundamental GPS standard (see ISO 14638). It influences all chain links of all chains of standards in the

general GPS matrix model.

The ISO/GPS matrix model given in ISO 14638 gives an overview of the ISO/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 more detailed information of the relation of this part of ISO 17450 to the GPS matrix model, see

Annex A.
© ISO 2016 – All rights reserved v
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SIST EN ISO 17450-3:2016
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SIST EN ISO 17450-3:2016
INTERNATIONAL STANDARD ISO 17450-3:2016(E)
Geometrical product specifications (GPS) — General
concepts —
Part 3:
Toleranced features
1 Scope

This part of ISO 17450 gives default definitions for the extracted features (integral or derived) of

workpieces, which are toleranced features in GPS specifications (dimensional, geometrical, or surface

texture specifications). This part of ISO 17450 defines default geometrical features used to define GPS

characteristics.
2 Normative references

The 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, the latest edition of the referenced document (including any amendments) applies.

ISO 17450-1, Geometrical product specifications (GPS) — General concepts — Part 1: Model for geometrical

specification and verification

ISO 22432, Geometrical product specifications (GPS) — Features utilized in specification and verification

ISO 25378, Geometrical product specification (GPS) — Characteristics and conditions — Definitions

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 17450-1, ISO 22432, ISO 25378

and the following apply.
3.1
opposing point pair

collection of two points established simultaneously, the separation of which is a local size of a

feature of size

Note 1 to entry: The distance between the two points constituting an opposing point pair is a two point size (see

ISO 14405-1).

Note 2 to entry: In the case of a feature of size defined as “two opposed planes”, the median point of the two

points constituting an extracted opposing point pair belongs to its median extracted surface.

3.2
elementary toleranced feature

smallest part of a complete geometrical feature for which a GPS characteristic is defined

EXAMPLE 1 For an unrestricted flatness specification, a global GPS characteristic is defined for the complete

integral feature, which in this case is an elementary toleranced feature.

EXAMPLE 2 For a straightness specification, a local GPS characteristic may be defined for each line feature in

a given direction in the complete integral feature. Each of these line features is the intersection between a planar

feature and the complete integral feature and is an elementary toleranced feature. The complete integral feature

is the toleranced feature.
© ISO 2016 – All rights reserved 1
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SIST EN ISO 17450-3:2016
ISO 17450-3:2016(E)
3.3
toleranced feature
complete toleranced feature

set of one or more geometrical features, for which a GPS characteristic is defined or a collection of

elementary toleranced features

Note 1 to entry: “Toleranced feature” without a qualifier is a complete feature, not an elementary feature.

Note 2 to entry: A toleranced feature is a set of geometrical features on which a GPS specification is defined.

3.4
median centre
centre point calculated as the centre of an opposing point pair

Note 1 to entry: A centre of an associated sphere is a directly associated median point (see ISO 22432 and 5.3.2.1)

and not a median centre.
4 General

A GPS characteristic (see ISO 25378) is a basic characteristic (an intrinsic characteristic or a location or

an orientation situation characteristic).

— The size of a deviated feature (see ISO 22432), which is nominally a feature of size is an intrinsic

characteristic (see ISO 17450-1), which is used for dimensional specification (see ISO 14405).

— The value calculated from the local distances between a deviated feature and a reference feature

(see ISO 22432) is a situation characteristic (see ISO 17450-1), which is used for geometrical

specification (see ISO 1101) or for surface texture characteristic (see ISO 25378 and ISO 1302).

A deviated feature is obtained from an input feature (see ISO 25378) by using or not using the operation

of filtration and/or association.

By default, the input integral feature is defined by an extraction of an infinite number of points from the

real feature. In verification, the extracted integral feature does not contain an infinite number of points.

By default, the input feature is a single feature, see ISO 22432.

By default, a boundary belongs to both adjacent single extracted integral features.

If the complete extracted integral feature is a line, then the complete extracted line is defined by the

intersection of the complete extracted integral surface feature with an intersection feature.

The intersection plane is a full plane (see Figure 1 and Figure 2) or a half plane (see Figure 3). The

intersection plane can be explicitly or implicitly defined by GPS specification with or without a specific

location. When the intersection has no specific location, then it belongs to a set of planes containing an

axis or a set of parallel planes or a set of planes oriented from an associated feature.

2 © ISO 2016 – All rights reserved
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SIST EN ISO 17450-3:2016
ISO 17450-3:2016(E)
Key
1 tolerance feature: complete extracted feature
2 associated feature
3 intersection plane which is established parallel to the associated surface
4 elementary toleranced feature: complete extracted section line

Figure 1 — Example of intersection plane used to establish an elementary toleranced feature

Key
1 complete extracted feature
2 associated feature
3 situation feature of the associated feature (in this case, its axis)
4 elementary toleranced feature: complete extracted section line
5 intersection plane perpendicular to the axis of the associated feature

Figure 2 — Example of intersection plane constrained in orientation used to establish an

elementary toleranced feature
© ISO 2016 – All rights reserved 3
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SIST EN ISO 17450-3:2016
ISO 17450-3:2016(E)
Key
1 toleranced feature: complete extracted feature
2 associated feature
3 situation feature of the associated feature (in this case, its axis)
4 intersection plane including the situation feature of the associated feature
5 elementary toleranced feature: complete extracted section line

Figure 3 — Example of intersection plane, as a half plane, used to establish an elementary

toleranced feature

If the input feature is a restricted feature, then its boundaries are defined from the single feature’s

boundaries with other features. The nominal location of the boundaries of the restricted feature shall be

given in the specification. To identify a location intrinsically defined on a single integral feature, a primary

datum is defined from the single integral feature. The location is defined from this primary datum.

To identify a location on a single integral feature defined in a given distance from an adjacent feature,

a primary datum is first defined from the single integral feature. Subsequently, a secondary datum as a

single datum or a common datum is defined from one or more adjacent features from which the location

is defined. The location is defined in thi
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