SIST EN ISO 129-1:2019
(Main)Technical product documentation (TPD) - Presentation of dimensions and tolerances - Part 1: General principles (ISO 129-1:2018)
Technical product documentation (TPD) - Presentation of dimensions and tolerances - Part 1: General principles (ISO 129-1:2018)
EN-ISO 129-1 establishes the general principles for presentation of dimensions and associated tolerances that apply to 2D technical drawings in all disciplines and trades but which can also be applied to 3D applications. This document does not cover the application of dimensional tolerances and their meaning. See ISO 14405-1 for tolerancing principles. This document can only be used to describe the nominal model of a drawing, not the non-ideal surface model (skin model) used for tolerancing purposes (for more information on tolerancing specifications, see the list of GPS standards listed as normative reference or as bibliography) Considering the ISO 14405 series, the presentation of tolerance indication is unambiguous when it is applied to a dimension which is a size and ambiguous when the dimension is not a size. All rules presented in this document are available for any type of drawing (see ISO 29845). In addition, this document introduces the concept of property indicators, developed length, between, surface indicators, flag notes and textual instructions.
Technische Produktdokumentation (TPD) - Angabe von Maßen und Toleranzen - Teil 1: Grundlagen (ISO 129-1:2018)
Dieses Dokument legt die allgemeinen Grundsätze für die Angabe von Maßen und den zugehörigen Toleranzen fest, die für technische 2D Zeichnungen in allen Bereichen und Branchen gelten, aber auch auf 3D Anwendungen angewendet werden können.
Dieses Dokument deckt nicht die Anwendung der Maßtoleranzen und deren Bedeutung ab. Siehe ISO 14405 1 für Tolerierungsprinzipien. Dieses Dokument kann nur zur Beschreibung des Nennmodells einer Zeichnung verwendet werden, nicht für das nicht ideale Oberflächenmodell (Hautmodell), das zu Tolerierungszwecken verwendet wird (für weitere Informationen zu Tolerierungsspezifikationen, siehe die Liste der GPS Normen, die als normative Verweisungen oder als Literaturhinweise aufgeführt sind).
Unter Berücksichtigung der Normenreihe ISO 14405, ist die Angabe der Toleranzindikation eindeutig, wenn sie auf ein Maß angewendet wird, das ein Größenmaß darstellt und mehrdeutig, wenn das Maß kein Größenmaß ist.
Alle in diesem Dokument genannten Regeln sind für jede Art von Zeichnung anwendbar (siehe ISO 29845).
Ergänzend führt dieses Dokument das Konzept der Eigenschaftsindikatoren, der entwickelten Länge, Zwischen, Flächenindikatoren, Kennzeichnungshinweise und textliche Anweisungen ein.
ANMERKUNG 1 Alle Bilder sind ausschließlich in der 2D Ansicht dargestellt.
ANMERKUNG 2 Zusätzliche Informationen und Einzelheiten für das Bauingenieurwesen sind ISO 6284 zu entnehmen.
Documentation technique de produits - Représentation des dimensions et tolérances - Partie 1: Principes généraux (ISO 129-1:2018)
ISO 129-1:218 établit les principes généraux pour la représentation des dimensions et des tolérances associées qui s'appliquent aux dessins techniques en deux dimensions dans toutes les disciplines et tous les métiers, mais qui peuvent également s'appliquer à des applications en trois dimensions.
ISO 129-1:218 ne couvre pas l'application de tolérances dimensionnelles et leur signification. Voir également l'ISO 14405‑1 pour les principes de tolérancement. Le présent document ne peut être utilisée que pour décrire le modèle nominal d'un dessin; elle ne peut pas être utilisée pour décrire le modèle de surface non idéal utilisé à des fins de tolérancement (pour plus d'informations sur les spécifications de tolérancement, voir la liste de normes GPS citées en tant que références normatives ou bibliographiques).
En ce qui concerne la série ISO 14405, la représentation de l'indication de tolérance ne présente aucune ambiguïté lorsqu'elle est appliquée à une dimension qui correspond à une alors qu'elle présente une ambiguïté lorsque la dimension ne correspond pas à une taille.
Toutes les règles présentées dans le présente document sont applicables à tout type de dessin (voir l'ISO 29845).
En outre, le présent document introduit le concept d'indicateurs de propriétés, de longueur développée, d'«entre», d'indicateurs de surface, de flag note et d'instructions textuelles.
NOTE 1 Toutes les figures sont représentées uniquement en 2D.
NOTE 2 Des informations et des détails supplémentaires sont donnés dans l'ISO 6284 pour la construction en génie civil.
Tehnična dokumentacija proizvodov - Predstavitev dimenzij in toleranc - 1. del: Splošna načela (ISO 129-1:2018)
Standard EN-ISO 129-1 določa splošna načela za predstavitev dimenzij in povezanih toleranc, ki se uporabljajo za tehnične risbe 2D v vseh disciplinah in strokah, vendar jih je mogoče uporabiti tudi pri risanju v tehniki 3D. Ta dokument ne zajema uporabe dimenzijskih toleranc in njihovega pomena. Za načela toleriranja glej standard ISO 14405-1. Ta dokument je mogoče uporabljati samo za opisovanje nominalnega modela risbe, ne pa tudi neidealnega površinskega modela (modela kože), ki se uporablja za namene toleriranja (za več informacij o specifikacijah toleriranja glej seznam standardov GPS, ki je naveden kot sklic na druge standarde ali kot literatura). Glede na skupino standardov ISO 14405 je predstavitev oznake tolerance nedvoumna, kadar se navezuje na dimenzijo, ki je velikost, in dvoumna, kadar dimenzija ni velikost. Vsa pravila v tem dokumentu so na voljo za katero koli vrsto risbe (glej standard ISO 29845). Poleg tega ta dokument uvaja koncept indikatorjev lastnosti, razvite dolžine med indikatorji površine, označevalnih opomb in besedilnih navodil.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 129-1:2019
01-december-2019
Tehnična dokumentacija proizvodov - Predstavitev dimenzij in toleranc - 1. del:
Splošna načela (ISO 129-1:2018)
Technical product documentation (TPD) - Presentation of dimensions and tolerances -
Part 1: General principles (ISO 129-1:2018)
Technische Produktdokumentation (TPD) - Angabe von Maßen und Toleranzen - Teil 1:
Grundlagen (ISO 129-1:2018)
Documentation technique de produits - Représentation des dimensions et tolérances -
Partie 1: Principes généraux (ISO 129-1:2018)
Ta slovenski standard je istoveten z: EN ISO 129-1:2019
ICS:
01.110 Tehnična dokumentacija za Technical product
izdelke documentation
SIST EN ISO 129-1:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 129-1:2019
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SIST EN ISO 129-1:2019
EN ISO 129-1
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 01.100.01
English Version
Technical product documentation (TPD) - Presentation of
dimensions and tolerances - Part 1: General principles (ISO
129-1:2018)
Documentation technique de produits - Représentation Technische Produktdokumentation (TPD) - Angabe
des dimensions et tolérances - Partie 1: Principes von Maßen und Toleranzen - Teil 1: Grundlagen (ISO
généraux (ISO 129-1:2018) 129-1:2018)
This European Standard was approved by CEN on 5 August 2019.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 129-1:2019 E
worldwide for CEN national Members.
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SIST EN ISO 129-1:2019
EN ISO 129-1:2019 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 129-1:2019
EN ISO 129-1:2019 (E)
European foreword
The text of ISO 129-1:2018 has been prepared by Technical Committee ISO/TC 10 "Technical product
documentation” of the International Organization for Standardization (ISO) and has been taken over as
EN ISO 129-1:2019 by CCMC.
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 April 2020, and conflicting national standards shall be
withdrawn at the latest by April 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN 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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 129-1:2018 has been approved by CEN as EN ISO 129-1:2019 without any modification.
3
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SIST EN ISO 129-1:2019
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SIST EN ISO 129-1:2019
INTERNATIONAL ISO
STANDARD 129-1
Second edition
2018-02
Technical product documentation
(TPD) — Presentation of dimensions
and tolerances —
Part 1:
General principles
Documentation technique de produits — Représentation des
dimensions et tolérances —
Partie 1: Principes généraux
Reference number
ISO 129-1:2018(E)
©
ISO 2018
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SIST EN ISO 129-1:2019
ISO 129-1:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
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SIST EN ISO 129-1:2019
ISO 129-1:2018(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Presentation of dimensions . 3
4.1 Presentation rules . 3
4.1.1 Dimensions . 3
4.1.2 Repeated dimensions . 3
4.1.3 Out of scale dimensions . 3
4.1.4 Auxiliary dimensions . 3
4.1.5 Theoretically exact dimensions . 3
4.1.6 Symmetrical dimensions . 4
4.1.7 Characters and presentation . 4
4.2 Positioning of dimensions . 4
4.3 Units of dimensions . 6
5 Elements of dimensioning — Usage . 6
5.1 General . 6
5.2 Property indicators . 7
5.3 Dimension line . 8
5.4 Terminators and origin presentation .11
5.4.1 Terminators .11
5.4.2 Origin presentation .12
5.5 Extension line .13
5.6 Leader line .17
5.7 Dimensional values .17
5.7.1 Presentation .17
5.7.2 Placement of dimensional values and symbols .17
5.7.3 Special placement of dimensional values and symbols .19
5.8 Alpha numerical characters and symbols representing dimensional values .20
5.8.1 Alpha numerical characters representing dimensional values .20
5.8.2 Symbols added to dimensional values .21
5.9 Tabular dimensioning .21
5.10 Complementary indication .22
6 Presentation of dimensional tolerances .22
6.1 General .22
6.2 Limit deviations .22
6.3 Limit dimensioning .24
7 Presentation of special dimensions .24
7.1 Arrangement of graphical and letter symbols with dimensional values .24
7.2 Diameters .26
7.3 Radii.26
7.3.1 General.26
7.3.2 Dimension location of radius centre .27
7.3.3 Semicircle features .28
7.3.4 Combined radii presentation .28
7.4 Spheres .29
7.5 Between .29
7.6 Arcs, chords and angles .30
7.7 Squares .32
7.8 Equally spaced and repeated features .33
7.8.1 Equally spaced features .33
© ISO 2018 – All rights reserved iii
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SIST EN ISO 129-1:2019
ISO 129-1:2018(E)
7.8.2 Repeated features .35
7.8.3 Tabulated repeated features .36
7.9 Symmetrical workpieces and views .37
7.10 Presentation of levels .39
7.11 Dimensions of out-of-scale represented features .40
7.12 Auxiliary dimensions .40
7.13 Theoretical exact dimensions .40
7.14 Dimensioning of curved features .40
7.14.1 Curved features defined by radii .40
7.14.2 Curved features defined by coordinate dimensions.41
7.15 Dimensioning of developed views .43
7.16 Dimensioning of thin parts .43
7.16.1 Thickness indication .43
7.16.2 Surface indication .44
7.17 Dimensioning of restricted areas .45
7.17.1 General Rules .45
7.17.2 Dimensioning of restricted areas on surfaces of revolution .45
7.17.3 Dimensioning of restricted areas on other than surfaces of revolution .46
8 Arrangements of dimensions .47
8.1 General .47
8.2 Chain dimensioning .47
8.3 Parallel dimensioning .47
8.4 Running dimensioning .48
8.4.1 General.48
8.4.2 Unidirectional and bidirectional running dimensions .48
8.5 Coordinate dimensioning .52
8.5.1 Cartesian coordinate dimensioning .52
8.5.2 Polar coordinate dimensioning .54
8.6 Combined dimensioning .55
9 Notes and special notations .56
9.1 Flag notes .56
9.2 Indication of textual instructions .58
Annex A (normative) Relations and dimensions of graphical symbols .60
Annex B (informative) Chamfers, countersinks, wedges, cones and screw threads .64
Annex C (informative) Former practice .67
Bibliography .68
iv © ISO 2018 – All rights reserved
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SIST EN ISO 129-1:2019
ISO 129-1:2018(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 voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 10, Technical product documentation.
This second edition cancels and replaces the first edition (ISO 129-1:2004), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— that this document does not cover the application of dimensioning tolerances has been clarified;
— property indicator, surface indicator, developed length and between symbols have been discussed;
— flag notes and textual instructions have been discussed;
— dimensioning repeated features and restricted areas have been clarified.
A list of all parts in the ISO 129 series can be found on the ISO website.
© ISO 2018 – All rights reserved v
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SIST EN ISO 129-1:2019
ISO 129-1:2018(E)
Introduction
This document is intended for all fields of application. See other parts of ISO 129 for information
pertaining to specific application areas.
The principles of tolerancing and the interpretation of tolerance presentations are given in the
ISO 14405 series.
Figures in this document illustrate the rules and are not intended to show complete representations. It
should be understood that third-angle projection could equally well have been used without prejudice
to the principles established.
vi © ISO 2018 – All rights reserved
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SIST EN ISO 129-1:2019
INTERNATIONAL STANDARD ISO 129-1:2018(E)
Technical product documentation (TPD) — Presentation of
dimensions and tolerances —
Part 1:
General principles
1 Scope
This document establishes the general principles for presentation of dimensions and associated
tolerances that apply to 2D technical drawings in all disciplines and trades but which can also be
applied to 3D applications.
This document does not cover the application of dimensional tolerances and their meaning. See
ISO 14405-1 for tolerancing principles. This document can only be used to describe the nominal model
of a drawing, not the non-ideal surface model (skin model) used for tolerancing purposes (for more
information on tolerancing specifications, see the list of GPS standards listed as normative reference or
as bibliography)
Considering the ISO 14405 series, the presentation of tolerance indication is unambiguous when it is
applied to a dimension which is a size and ambiguous when the dimension is not a size.
All rules presented in this document are available for any type of drawing (see ISO 29845).
In addition, this document introduces the concept of property indicators, developed length, between,
surface indicators, flag notes and textual instructions.
NOTE 1 All figures are shown in 2D views only.
NOTE 2 Additional information and details for construction engineering are given in ISO 6284.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 128-20, Technical drawings — General principles of presentation — Part 20: Basic conventions for lines
ISO 128-22, Technical drawings — General principles of presentation — Part 22: Basic conventions and
applications for leader lines and reference lines
ISO 128-24:2014, Technical drawings — General principles of presentation — Part 24: Lines on mechanical
engineering drawings
ISO 3098 (all parts), Technical product documentation — Lettering
ISO 10209, Technical product documentation — Vocabulary — Terms relating to technical drawings,
product definition and related documentation
ISO 14405 (all parts), Geometrical product specifications (GPS) — Dimensional tolerancing
ISO 81714-1, Design of graphical symbols for use in the technical documentation of products — Part 1:
Basic rules
© ISO 2018 – All rights reserved 1
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SIST EN ISO 129-1:2019
ISO 129-1:2018(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10209 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 Elements of dimensioning
3.1.1
centre line
line or set of two perpendicular lines used to represent a median feature, e.g. an axis or a centre plane
3.1.2
dimension line
straight or curved line with terminators at each end or origin and terminator at each end, indicating
the size of a feature or the extent of a feature or between two features, or between a feature and an
extension line (3.1.3), or between two extension lines
3.1.3
extension line
line which is an extension of a feature outline or of a centre line (3.1.1)
3.1.4
origin symbol
circle indicating the start of running dimensioning or coordinate dimensioning
3.2 Dimensions
3.2.1
angular dimension
angle of an angular feature of size or angle between two features
Note 1 to entry: In mechanical engineering drawings, angular dimensions are classified as angular sizes or
angular distances; see ISO 14405-2.
3.2.2
dimensional value
nominal numerical value expressed in a specific unit relevant to a linear or angular dimension (3.2.4, 3.2.1)
Note 1 to entry: The tolerance limits and/or permissible deviations are applied to the dimensional value.
3.2.3
developed length
initial length of material prior to forming, e.g. by bending
3.2.4
linear dimension
linear size of a feature of size or a linear distance bet
...
SLOVENSKI STANDARD
oSIST prEN ISO 129-1:2019
01-maj-2019
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Technical product documentation (TPD) - Presentation of dimensions and tolerances -
Part 1: General principles (ISO 129-1:2018)
Documentation technique de produits - Représentation des dimensions et tolérances -
Partie 1: Principes généraux (ISO 129-1:2018)
Ta slovenski standard je istoveten z: prEN ISO 129-1
ICS:
01.110 7HKQLþQDGRNXPHQWDFLMD]D Technical product
L]GHONH documentation
oSIST prEN ISO 129-1:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 129-1:2019
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oSIST prEN ISO 129-1:2019
INTERNATIONAL ISO
STANDARD 129-1
Second edition
2018-02
Technical product documentation
(TPD) — Presentation of dimensions
and tolerances —
Part 1:
General principles
Documentation technique de produits — Représentation des
dimensions et tolérances —
Partie 1: Principes généraux
Reference number
ISO 129-1:2018(E)
©
ISO 2018
---------------------- Page: 3 ----------------------
oSIST prEN ISO 129-1:2019
ISO 129-1:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 129-1:2019
ISO 129-1:2018(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Presentation of dimensions . 3
4.1 Presentation rules . 3
4.1.1 Dimensions . 3
4.1.2 Repeated dimensions . 3
4.1.3 Out of scale dimensions . 3
4.1.4 Auxiliary dimensions . 3
4.1.5 Theoretically exact dimensions . 3
4.1.6 Symmetrical dimensions . 4
4.1.7 Characters and presentation . 4
4.2 Positioning of dimensions . 4
4.3 Units of dimensions . 6
5 Elements of dimensioning — Usage . 6
5.1 General . 6
5.2 Property indicators . 7
5.3 Dimension line . 8
5.4 Terminators and origin presentation .11
5.4.1 Terminators .11
5.4.2 Origin presentation .12
5.5 Extension line .13
5.6 Leader line .17
5.7 Dimensional values .17
5.7.1 Presentation .17
5.7.2 Placement of dimensional values and symbols .17
5.7.3 Special placement of dimensional values and symbols .19
5.8 Alpha numerical characters and symbols representing dimensional values .20
5.8.1 Alpha numerical characters representing dimensional values .20
5.8.2 Symbols added to dimensional values .21
5.9 Tabular dimensioning .21
5.10 Complementary indication .22
6 Presentation of dimensional tolerances .22
6.1 General .22
6.2 Limit deviations .22
6.3 Limit dimensioning .24
7 Presentation of special dimensions .24
7.1 Arrangement of graphical and letter symbols with dimensional values .24
7.2 Diameters .26
7.3 Radii.26
7.3.1 General.26
7.3.2 Dimension location of radius centre .27
7.3.3 Semicircle features .28
7.3.4 Combined radii presentation .28
7.4 Spheres .29
7.5 Between .29
7.6 Arcs, chords and angles .30
7.7 Squares .32
7.8 Equally spaced and repeated features .33
7.8.1 Equally spaced features .33
© ISO 2018 – All rights reserved iii
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oSIST prEN ISO 129-1:2019
ISO 129-1:2018(E)
7.8.2 Repeated features .35
7.8.3 Tabulated repeated features .36
7.9 Symmetrical workpieces and views .37
7.10 Presentation of levels .39
7.11 Dimensions of out-of-scale represented features .40
7.12 Auxiliary dimensions .40
7.13 Theoretical exact dimensions .40
7.14 Dimensioning of curved features .40
7.14.1 Curved features defined by radii .40
7.14.2 Curved features defined by coordinate dimensions.41
7.15 Dimensioning of developed views .43
7.16 Dimensioning of thin parts .43
7.16.1 Thickness indication .43
7.16.2 Surface indication .44
7.17 Dimensioning of restricted areas .45
7.17.1 General Rules .45
7.17.2 Dimensioning of restricted areas on surfaces of revolution .45
7.17.3 Dimensioning of restricted areas on other than surfaces of revolution .46
8 Arrangements of dimensions .47
8.1 General .47
8.2 Chain dimensioning .47
8.3 Parallel dimensioning .47
8.4 Running dimensioning .48
8.4.1 General.48
8.4.2 Unidirectional and bidirectional running dimensions .48
8.5 Coordinate dimensioning .52
8.5.1 Cartesian coordinate dimensioning .52
8.5.2 Polar coordinate dimensioning .54
8.6 Combined dimensioning .55
9 Notes and special notations .56
9.1 Flag notes .56
9.2 Indication of textual instructions .58
Annex A (normative) Relations and dimensions of graphical symbols .60
Annex B (informative) Chamfers, countersinks, wedges, cones and screw threads .64
Annex C (informative) Former practice .67
Bibliography .68
iv © ISO 2018 – All rights reserved
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oSIST prEN ISO 129-1:2019
ISO 129-1:2018(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 voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 10, Technical product documentation.
This second edition cancels and replaces the first edition (ISO 129-1:2004), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— that this document does not cover the application of dimensioning tolerances has been clarified;
— property indicator, surface indicator, developed length and between symbols have been discussed;
— flag notes and textual instructions have been discussed;
— dimensioning repeated features and restricted areas have been clarified.
A list of all parts in the ISO 129 series can be found on the ISO website.
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ISO 129-1:2018(E)
Introduction
This document is intended for all fields of application. See other parts of ISO 129 for information
pertaining to specific application areas.
The principles of tolerancing and the interpretation of tolerance presentations are given in the
ISO 14405 series.
Figures in this document illustrate the rules and are not intended to show complete representations. It
should be understood that third-angle projection could equally well have been used without prejudice
to the principles established.
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oSIST prEN ISO 129-1:2019
INTERNATIONAL STANDARD ISO 129-1:2018(E)
Technical product documentation (TPD) — Presentation of
dimensions and tolerances —
Part 1:
General principles
1 Scope
This document establishes the general principles for presentation of dimensions and associated
tolerances that apply to 2D technical drawings in all disciplines and trades but which can also be
applied to 3D applications.
This document does not cover the application of dimensional tolerances and their meaning. See
ISO 14405-1 for tolerancing principles. This document can only be used to describe the nominal model
of a drawing, not the non-ideal surface model (skin model) used for tolerancing purposes (for more
information on tolerancing specifications, see the list of GPS standards listed as normative reference or
as bibliography)
Considering the ISO 14405 series, the presentation of tolerance indication is unambiguous when it is
applied to a dimension which is a size and ambiguous when the dimension is not a size.
All rules presented in this document are available for any type of drawing (see ISO 29845).
In addition, this document introduces the concept of property indicators, developed length, between,
surface indicators, flag notes and textual instructions.
NOTE 1 All figures are shown in 2D views only.
NOTE 2 Additional information and details for construction engineering are given in ISO 6284.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 128-20, Technical drawings — General principles of presentation — Part 20: Basic conventions for lines
ISO 128-22, Technical drawings — General principles of presentation — Part 22: Basic conventions and
applications for leader lines and reference lines
ISO 128-24:2014, Technical drawings — General principles of presentation — Part 24: Lines on mechanical
engineering drawings
ISO 3098 (all parts), Technical product documentation — Lettering
ISO 10209, Technical product documentation — Vocabulary — Terms relating to technical drawings,
product definition and related documentation
ISO 14405 (all parts), Geometrical product specifications (GPS) — Dimensional tolerancing
ISO 81714-1, Design of graphical symbols for use in the technical documentation of products — Part 1:
Basic rules
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ISO 129-1:2018(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 10209 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 Elements of dimensioning
3.1.1
centre line
line or set of two perpendicular lines used to represent a median feature, e.g. an axis or a centre plane
3.1.2
dimension line
straight or curved line with terminators at each end or origin and terminator at each end, indicating
the size of a feature or the extent of a feature or between two features, or between a feature and an
extension line (3.1.3), or between two extension lines
3.1.3
extension line
line which is an extension of a feature outline or of a centre line (3.1.1)
3.1.4
origin symbol
circle indicating the start of running dimensioning or coordinate dimensioning
3.2 Dimensions
3.2.1
angular dimension
angle of an angular feature of size or angle between two features
Note 1 to entry: In mechanical engineering drawings, angular dimensions are classified as angular sizes or
angular distances; see ISO 14405-2.
3.2.2
dimensional value
nominal numerical value expressed in a specific unit relevant to a linear or angular dimension (3.2.4, 3.2.1)
Note 1 to entry: The tolerance limits and/or permissible deviations are applied to the dimensional value.
3.2.3
developed length
initial length of material prior to forming, e.g. by bending
3.2.4
linear dimension
linear size of a feature of size or a linear distance between two features
Note 1 to entry: In mechanical engineering drawings, linear dimensions are classified as linear sizes or linear
distances; see ISO 14405-2.
3.2.5
property indicator
symbol used to define the shape of a feature or property of an entity composed by several features
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ISO 129-1:2018(E)
4 Presentation of dimensions
4.1 Presentation rules
4.1.1 Dimensions
Only the dimensions necessary to unambiguously define the nominal geometry (nominal model) shall
be presented. Each dimension shall be presented only once by using a dimension line, a dimension value
preceded, and if necessary, by a property indicator. When there is a need to repeat the presentation of a
dimension, auxiliary dimensions may be used.
Dimensional values indicated in decimal notation, shall use a comma as the decimal marker.
Unless otherwise specified, dimensions shall be indicated for the finished state of the dimensioned
feature.
The text of all dimensions, graphical symbols and annotations shall be indicated above the dimension
line and read from the bottom. When the text of a dimension, symbol or annotation is presented
vertically, it shall read from the right. The determination of orientation is based on the centre of the
dimension, symbol or annotation.
Dimensions alone are not sufficient to define the requirements of a product. Dimensions shall be used
with other specification techniques as applicable, e.g. general tolerances, geometrical tolerancing or
surface texture requirements.
4.1.2 Repeated dimensions
When a feature is repeated on the drawing, it is possible to simplify the indication of its dimension on
the drawing by indicating:
— on one instance of the feature, the nominal dimension (with a property indicator symbol if
appropriate), preceded by the associated number of repetition, followed by a multiplication symbol
(×) and a space (e.g. 2× ⌀18) (see Figure 10). To avoid confusion, it is possible to identify each member
of the repetition using a reference identifier (e.g. letter or symbol) (see Figure 64);
— a nominal dimension (with a property indicator symbol if appropriate) above a reference line, which
is attached to each member of the repetition (see Figures 49 and 50).
4.1.3 Out of scale dimensions
By default, a dimension line is drawn to the scale of the drawing. In exceptional cases, in 2D drawing
only, when the dimension value does not correspond to its dimension scale value (out-of-scale features),
the dimension value shall be marked by underlining the dimensional value (see 7.11 and Figure 70).
4.1.4 Auxiliary dimensions
A dimension value can be defined as a dimension for information purposes only. In this case, the
dimension value shall be placed into parenthesis, ( ). This kind of dimension is called an auxiliary
dimension (see 7.12 and Figures 65 and 66).
4.1.5 Theoretically exact dimensions
When a dimension value shall be considered as a theoretical exact dimension and not associated
with general ± tolerancing or not an auxiliary dimension, it shall be placed in a rectangular frame (in
accordance with ISO 1101, 7.13 and Figure 71).
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4.1.6 Symmetrical dimensions
When the design of a part has one or more symmetries, it is possible to represent a portion of the part
which can allow reconstructing the complete part by symmetry (see 7.9). In this case, the dimensions,
shown only on the portion and the dimension line between two symmetrical features, are indicated
from the feature shown on the portion with a termination and cross perpendicularly the axis of
symmetry without termination (see Figures 65 and 66).
4.1.7 Characters and presentation
Characters on drawings shall be in accordance with the ISO 3098 series.
There shall
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