EN ISO 5459:2024

SLOVENSKI STANDARD
01-junij-2024
Specifikacija geometrijskih veličin izdelka - Geometrijsko toleriranje - Reference in
sistemi referenc (ISO/FDIS 5459:2024)
Geometrical product specifications (GPS) - Geometrical tolerancing - Datums and datum
systems (ISO/FDIS 5459:2024)
Geometrische Produktspezifikation (GPS) - Geometrische Tolerierung - Bezüge und
Bezugssysteme (ISO/FDIS 5459:2024)
Spécification géométrique des produits (GPS) - Tolérancement géométrique -
Références spécifiées et systèmes de références spécifiées (ISO/FDIS 5459:2024)
Ta slovenski standard je istoveten z: prEN ISO 5459
ICS:
17.040.10 Tolerance in ujemi Limits and fits
17.040.40 Specifikacija geometrijskih Geometrical Product
veličin izdelka (GPS) Specification (GPS)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

FINAL DRAFT
International
Standard
ISO/FDIS 5459
ISO/TC 213
Geometrical product specifications
Secretariat: BSI
(GPS) — Geometrical tolerancing —
Voting begins on:
Datums and datum systems
2024-04-03
Spécification géométrique des produits (GPS) — Tolérancement
Voting terminates on:
géométrique — Références spécifiées et systèmes de références
2024-06-26
spécifiées
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
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BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 5459:2024(en) © ISO 2024

FINAL DRAFT
ISO/FDIS 5459:2024(en)
International
Standard
ISO/FDIS 5459
ISO/TC 213
Geometrical product specifications
Secretariat: BSI
(GPS) — Geometrical tolerancing —
Voting begins on:
Datums and datum systems
Spécification géométrique des produits (GPS) — Tolérancement
Voting terminates on:
géométrique — Références spécifiées et systèmes de références
spécifiées
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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Published in Switzerland Reference number
ISO/FDIS 5459:2024(en) © ISO 2024

ii
ISO/FDIS 5459:2024(en)
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 5
5 Role of datums . 7
6 General concepts . 9
6.1 General .9
6.2 Intrinsic characteristics of surfaces associated with datum features .10
6.2.1 General .10
6.2.2 Single datum established from a single feature .11
6.2.3 Common datum established from two or more single features simultaneously .11
6.2.4 Datum systems established in a defined sequence from two or more single
features . 13
6.3 Single datums, common datums and datum systems . 13
6.3.1 General . 13
6.3.2 Single datums . 13
6.3.3 Common datums . .14
6.3.4 Datum systems. 15
7 Graphical language .18
7.1 General .18
7.2 Indication of datum features .18
7.2.1 Datum feature indicator .18
7.2.2 Datum feature identifier.19
7.2.3 Datum targets .19
7.3 Specification of datums and datum systems . 23
7.4 Indication and meaning of rules .24
7.4.1 General .24
7.4.2 Rules .24
8 Specification operators for datum .46
8.1 ISO default specification operator for datum . 46
8.2 Special specification operator for datum . 46
8.2.1 General . 46
8.2.2 Filtration specification elements for datum .47
8.2.3 Association specification elements for datum . 48
8.3 Drawing-default specification operator for datums . 49
Annex A (normative) Association for datums . .50
Annex B (informative) Invariance classes .60
Annex C (informative) Examples .62
Annex D (informative) Former practices .83
Annex E (informative) Examples of a datum system or a common datum established with
contacting features .87
Annex F (normative) Relations and dimensions of graphical symbols .93
Annex G (normative) Establishment of a datum coordinate system from a datum system .96
Annex H (informative) Filter symbols and attached nesting index .100
Annex I (informative) Issue of orientation and location constraints in datum systems .101

iii
ISO/FDIS 5459:2024(en)
Annex J (normative) Filtration of a datum feature which is nominally a plane .108
Annex K (informative) Relation to the GPS matrix model .111
Bibliography .112

iv
ISO/FDIS 5459:2024(en)
Foreword
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