SIST EN ISO 8062-3:2023
(Main)Geometrical product specifications (GPS) - Dimensional and geometrical tolerances for moulded parts - Part 3: General dimensional and geometrical tolerances and machining allowances for castings using ± tolerances for indicated dimensions (ISO 8062-3:2023)
Geometrical product specifications (GPS) - Dimensional and geometrical tolerances for moulded parts - Part 3: General dimensional and geometrical tolerances and machining allowances for castings using ± tolerances for indicated dimensions (ISO 8062-3:2023)
This document specifies the general conditions for the thermomechanical analysis of thermoplastics and thermosetting materials, filled or unfilled, in the form of sheet or moulded parts.
Thermomechanical analysis consists of the determination of deformations of a test specimen under constant load as a function of temperature and/or time.
Geometrische Produktspezifikationen (GPS) - Maß-, Form- und Lagetoleranzen für Formteile - Teil 3: Allgemeine Maß-, Form- und Lagetoleranzen und Bearbeitungszugaben für Gussstücke mit ± Toleranzen für die angegebenen Maße (ISO 8062-3:2023)
Dieses Dokument legt allgemeine Maß-, Form- und Lagetoleranzen sowie Grade für Bearbeitungszugaben für Gussstücke im Lieferzustand mit ± Toleranzen für die angegebenen Maße fest, die dem Käufer in Übereinstimmung mit ISO/TS 8062 2 geliefert werden. Es ist anwendbar für Maß-, Form- und Lagetoleranzen von nach verschiedenen Gießverfahren hergestellten Gussstücken aus allen metallischen Gusswerkstoffen und deren Legierungen.
Dieses Dokument gilt nicht für 3D CAD Modelle ohne Angabe von Maßen.
Dieses Dokument gilt sowohl für (im oder nahe am Zeichnungsschriftfeld der Zeichnung) angegebene allgemeine Maß-, Form- und Lagetoleranzen als auch für (direkt in der Zeichnung angegebene) individuelle Toleranzen und wo besonders in der Zeichnung auf Hinweise von Abschnitt 11 Bezug genommen wird, falls nichts anderes festgelegt ist.
Die in diesem Dokument enthaltenen Maßtoleranzen sind Toleranzen für Längenmaße.
Die in diesem Dokument enthaltenen Form- und Lagetoleranzen sind Toleranzen für:
— Geradheit;
— Ebenheit;
— Rundheit;
— Parallelität;
— Rechtwinkligkeit;
— Symmetrie;
— Koaxialität.
Dieses Dokument behandelt keine anderen Lagetoleranzen, Winkelmaßtoleranzen oder Zylindrizitätstoleranzen.
Dieses Dokument kann für die Auswahl von individuellen Toleranzwerten angewendet werden.
Spécification géométrique des produits (GPS) - Tolérances dimensionnelles et géométriques des pièces moulées - Partie 3: Tolérances dimensionnelles et géométriques générales et surépaisseurs d'usinage pour les pièces moulées utilisant des tolérances ± pour les dimensions indiquées (ISO 8062-3:2023)
Le présent document spécifie les tolérances dimensionnelles et géométriques générales ainsi que les classes de surépaisseur d'usinage pour les pièces moulées utilisant des tolérances ± pour les dimensions indiquées telles que livrées à l'acheteur conformément à l'ISO/TS 8062‑2. Il s'applique au tolérancement des dimensions et de la géométrie des pièces moulées en tous métaux et leurs alliages, produites par différents procédés de fabrication par moulage.
Le présent document ne s'applique pas aux modèles CAO 3D utilisés sans dimension indiquée.
Le présent document s'applique à la fois aux tolérances dimensionnelles et géométriques générales (auxquelles il est fait référence dans ou à proximité du cartouche du dessin), sauf spécification contraire et là où il est fait une mention particulière sur le dessin selon l'une des références de l'Article 11.
Les tolérances dimensionnelles couvertes par le présent document sont les tolérances pour des dimensions linéaires.
Les tolérances géométriques couvertes par le présent document sont des tolérances pour:
— la rectitude;
— la planéité;
— la circularité;
— le parallélisme;
— la perpendicularité;
— la symétrie;
— la coaxialité.
Le présent document ne couvre pas les autres tolérances de localisation, dimensionnelles angulaires ou de cylindricité.
Le présent document peut être utilisé pour le choix des valeurs de tolérance pour des indications individuelles.
Specifikacija geometrijskih veličin izdelka (GPS) - Dimenzijske in geometrijske tolerance zaformanih delov - 3. del: Splošne dimenzijske in geometrijske tolerance ter dodatki za strojno obdelavo ulitkov z uporabo ± toleranc za navedene dimenzije (ISO 8062-3:2023)
Ta dokument določa splošne pogoje za termomehansko analizo termoplastičnih ali termoaktivnih materialov s polnilom ali brez njega v obliki pločevine ali oblikovanih delov.
Termomehanska analiza vključuje ugotavljanje deformacij na preskusnem vzorcu pod stalno obremenitvijo kot funkcijo temperature in/ali časa.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 8062-3:2023
01-maj-2023
Specifikacija geometrijskih veličin izdelka (GPS) - Dimenzijske in geometrijske
tolerance zaformanih delov - 3. del: Splošne dimenzijske in geometrijske tolerance
ter dodatki za strojno obdelavo ulitkov z uporabo ± toleranc za navedene
dimenzije (ISO 8062-3:2023)
Geometrical product specifications (GPS) - Dimensional and geometrical tolerances for
moulded parts - Part 3: General dimensional and geometrical tolerances and machining
allowances for castings using ± tolerances for indicated dimensions (ISO 8062-3:2023)
Geometrische Produktspezifikationen (GPS) - Maß-, Form- und Lagetoleranzen für
Formteile - Teil 3: Allgemeine Maß-, Form- und Lagetoleranzen und
Bearbeitungszugaben für Gussstücke mit ± Toleranzen für die angegebenen Maße (ISO
8062-3:2023)
Spécification géométrique des produits (GPS) - Tolérances dimensionnelles et
géométriques des pièces moulées - Partie 3: Tolérances dimensionnelles et
géométriques générales et surépaisseurs d'usinage pour les pièces moulées utilisant
des tolérances ± pour les dimensions indiquées (ISO 8062-3:2023)
Ta slovenski standard je istoveten z: EN ISO 8062-3:2023
ICS:
17.040.10 Tolerance in ujemi Limits and fits
17.040.40 Specifikacija geometrijskih Geometrical Product
veličin izdelka (GPS) Specification (GPS)
SIST EN ISO 8062-3:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 8062-3:2023
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SIST EN ISO 8062-3:2023
EN ISO 8062-3
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2023
EUROPÄISCHE NORM
ICS 17.040.10 Supersedes EN ISO 8062-3:2007, EN ISO 8062-
3:2007/AC:2009
English Version
Geometrical product specifications (GPS) - Dimensional
and geometrical tolerances for moulded parts - Part 3:
General dimensional and geometrical tolerances and
machining allowances for castings using ± tolerances for
indicated dimensions (ISO 8062-3:2023)
Spécification géométrique des produits (GPS) - Geometrische Produktspezifikationen (GPS) - Maß-,
Tolérances dimensionnelles et géométriques des Form- und Lagetoleranzen für Formteile - Teil 3:
pièces moulées - Partie 3: Tolérances dimensionnelles Allgemeine Maß-, Form- und Lagetoleranzen und
et géométriques générales et surépaisseurs d'usinage Bearbeitungszugaben für Gussstücke mit ± Toleranzen
pour les pièces moulées utilisant des tolérances ± pour für die angegebenen Maße (ISO 8062-3:2023)
les dimensions indiquées (ISO 8062-3:2023)
This European Standard was approved by CEN on 30 December 2022.
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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8062-3:2023 E
worldwide for CEN national Members.
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SIST EN ISO 8062-3:2023
EN ISO 8062-3:2023 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 8062-3:2023
EN ISO 8062-3:2023 (E)
European foreword
This document (EN ISO 8062-3:2023) has been prepared by Technical Committee ISO/TC 213
"Dimensional and geometrical product specifications and verification" in collaboration with Technical
Committee CEN/TC 190 “Foundry technology” the secretariat of which is held by DIN.
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 September 2023, and conflicting national standards
shall be withdrawn at the latest by September 2023.
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.
This document supersedes EN ISO 8062-3:2007.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 8062-3:2023 has been approved by CEN as EN ISO 8062-3:2023 without any
modification.
3
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SIST EN ISO 8062-3:2023
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SIST EN ISO 8062-3:2023
INTERNATIONAL ISO
STANDARD 8062-3
Second edition
2023-02
Geometrical product specifications
(GPS) — Dimensional and geometrical
tolerances for moulded parts —
Part 3:
General dimensional and geometrical
tolerances and machining allowances
for castings using ± tolerances for
indicated dimensions
Spécification géométrique des produits (GPS) — Tolérances
dimensionnelles et géométriques des pièces moulées —
Partie 3: Tolérances dimensionnelles et géométriques générales
et surépaisseurs d'usinage pour les pièces moulées utilisant des
tolérances ± pour les dimensions indiquées
Reference number
ISO 8062-3:2023(E)
© ISO 2023
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(E)
Contents Page
Foreword .iv
Introduction . vi
1 S c op e . 1
2 N ormative references . 1
3 Terms and definitions . 2
4 Abbr ev i at ed t er m s . 3
5 Tap er . 3
6 D raft angles (taper) . 4
7 T olerance grades . .7
7.1 G eneral . 7
7.2 D imensional casting tolerance grades (DCTG) . 7
7.3 G eometrical casting tolerance grades (GCTG) . 9
7.3.1 General . 9
7. 3 . 2 Nom i n a l d i men s ion s . 9
7. 3 . 3 Dat u m s . 9
8 S urface mismatch (SMI) .12
9 W all thickness.12
10 Re quired machining allowances (RMA) .12
10.1 G eneral .12
10.2 R equired machining allowance grades (RMAG) . 13
11 Indication on drawings .13
11.1 I ndication of general DCTs . 13
11.2 I ndication of machining allowances . 14
11.3 I ndication of geometrical casting tolerances (GCTs) . 14
12 R ejection .15
Annex A (informative) Dimensional and geometrical tolerances for castings .16
Annex B (informative) Required machining allowance grades (RMAG).19
Annex C (informative) Concept of general tolerancing of characteristics.20
Annex D (informative) Datums for general geometrical tolerances .22
Annex E (informative) Application of general geometrical tolerances for castings .26
Annex F (informative) Relation to the GPS matrix model .33
Bibliography .34
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(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 of 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
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product
specifications and verification, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 190, Foundry technology, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 8062-3:2007), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 8062-3:2007/Cor 1:2009.
The main changes are as follows:
— clarified in title and scope that this document specifies general dimensional and geometrical
tolerances as well as machining allowance grades for castings using ± tolerances for indicated
dimensions;
— definitions for the terms “draft angle”, “external draft value” and “internal draft angle” have been
added;
— Clause 4 and Clause 5 , including Tables 2 to 6, have been added and subsequent clauses and tables
have been renumbered;
— in Table 7 the linear dimensional casting tolerance grade DCTG 16 has been changed to DCTG 15wt
to clarify the concept of wall thickness;
— the nominal dimension to be used in the tables indicating casting tolerances for straightness,
flatness, roundness, parallelism, perpendicularity, symmetry and coaxiality (Tables 8 to 11) has
been changed;
— Clause 12 on rejection has been clarified;
— the correction according to ISO 8062-3:2007/Cor 1:2009 has been added in Table A.3, footnote b;
— the examples given in Annex E have been corrected;
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(E)
— inconsistencies have been clarified.
A list of all parts in the ISO 8062 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(E)
Introduction
This document is a geometrical product specification (GPS) standard and is regarded as a
complementary process-specific tolerance standard (see ISO 14638). It influences chain links A and B
on size and A, B and C on distance in the ISO GPS standards matrix model (see Annex F) but is not in full
accordance with the ISO GPS rules.
For more detailed information on the relation of this document to other standards and the GPS matrix
model, see Annex F.
This document defines a system of tolerance grades and machining allowance grades for cast metals
and their alloys. Guidance on its application is given in ISO/TS 8062-2.
It is noted that the dimensional specifications introduced by the application of this document can be
ambiguous when applied to a dimension which is not a size (see ISO 14405-2).
The tolerances specified for a casting may determine the casting method. It is therefore recommended,
before the design or the order is finalized, that the customer liaises with the foundry to discuss:
a) the proposed casting design and accuracy required;
b) machining requirements;
c) moulding method, for example with or without core;
d) location of the parting surfaces and the necessary draft angles;
e) the number of castings to be manufactured;
f) the casting equipment involved;
g) the consequences of the equipment wearing out during its life cycle;
h) datum system according to ISO 5459;
i) casting alloy;
j) any special requirements, for instance individual dimensional and geometrical tolerances, fillet
radii, tolerances and individual machining allowances;
NOTE Tolerance grades which can be achieved for various methods and metals are described in
Annex A, because dimensional and geometrical accuracy of a casting is related to production factors.
k) dimensional tolerances for long series and mass production, where development, adjustment and
maintenance of casting equipment make it possible to achieve close tolerances;
l) dimensional tolerances for short series and single production;
m) geometrical tolerances.
Information on typical required machining allowance grades is given in Annex B.
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SIST EN ISO 8062-3:2023
INTERNATIONAL STANDARD ISO 8062-3:2023(E)
Geometrical product specifications (GPS) — Dimensional
and geometrical tolerances for moulded parts —
Part 3:
General dimensional and geometrical tolerances and
machining allowances for castings using ± tolerances for
indicated dimensions
1 S cope
This document specifies general dimensional and geometrical tolerances as well as machining
allowance grades for castings using ± tolerances for indicated dimensions as delivered to the purchaser
according to ISO/TS 8062-2. It is applicable for tolerancing of dimensions and geometry of castings in
all cast metals and their alloys produced by various casting manufacturing processes.
This document does not apply to 3D CAD models used without indicated dimensions.
This document applies to both general dimensional and general geometrical tolerances (referred to in
or near the title block of the drawing), unless otherwise specified and where specifically referred to on
the drawing by one of the references in Clause 11.
The dimensional tolerances covered by this document are tolerances for linear dimensions.
The geometrical tolerances covered by this document are tolerances for:
— straightness;
— flatness;
— roundness;
— parallelism;
— perpendicularity;
— symmetry;
— coaxiality.
This document does not cover other position tolerances, angular dimensional tolerances or cylindricity
tolerances.
This document can be used for the selection of tolerance values for individual indications.
2 Normat ive 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 129-1, Technical product documentation (TPD) — Presentation of dimensions and tolerances — Part 1:
General principles
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(E)
ISO 1101, Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form,
orientation, location and run-out
1)
ISO 1302, Geometrical Product Specifications (GPS) — Indication of surface texture in technical product
documentation
ISO 5459, Geometrical product specifications (GPS) — Geometrical tolerancing — Datums and datum
systems
ISO 8062-1, Geometrical product specifications (GPS) — Dimensional and geometrical tolerances for
moulded parts — Part 1: Vocabulary
ISO 10135, Geometrical product specifications (GPS) — Drawing indications for moulded parts in technical
product documentation (TPD)
ISO 10579, Geometrical product specifications (GPS) — Dimensioning and tolerancing — Non-rigid parts
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1101, ISO 5459, ISO 8062-1
and ISO 10135 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
draft angle
taper
value of inclination (angle) that is added to a geometrical feature of a pattern or mould to ensure the
removal of the pattern or moulded part from the mould
3.2
external draft value
draft angle (3.1) on a surface that has no opposite surface in the direction outward of the part
Note 1 to entry: See Figure 1.
3.3
internal draft angle
draft angle (3.1) on a surface that has an opposite surface in the direction outward of the part
Note 1 to entry: See Figure 1.
1) Cancelled and replaced by ISO 21920-1.
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(E)
Key
length of the external feature
L
1
length of the internal feature
L
2
external draft angle
α
e
internal draft angle
α
i
Figure 1 — External and internal draft angles
4 Abbreviated terms
For the purposes of this document, the abbreviated terms given in Table 1 apply.
Table 1 — Abbreviated terms
Abbreviation Full term
DCT dimensional casting tolerance
DCTG dimensional casting tolerance grade
GCT geometrical casting tolerance
GCTG geometrical casting tolerance grade
RMA required machining allowance
RMAG required machining allowance grade
SG spheroidal graphite
SMI surface mismatch
TM taper minus
TP taper plus
5 Taper
The parting surface shall be indicated by the symbols and according to ISO 10135.
There are three possibilities to indicate taper:
a) the taper is already included in the nominal model;
b) the taper is indicated by the symbol ;
c) the taper is indicated by the symbol .
In case a), the general profile surface tolerance zone is located symmetrically to the nominal surface.
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(E)
In case b), the general profile surface tolerance zone is located symmetrically to the surface when the
taper is added to the nominal model.
In case c), the general profile surface tolerance zone increases steadily, as shown in Figure 2.
a) Draft angle increasing the ideal model fea- b) Draft angle increasing the tolerance of fea-
ture(s) ture(s)
Key
1 tolerance constant 0,3
2 ideal shape gradually increased ∅40 → ∅40,8
3 tolerance gradually increased 0,3 → 0,7
4 ideal shape constant ∅40
Figure 2 — Taper, tolerance zones
Unless otherwise indicated, taper plus (TP) shall apply. The exception to this rule is for features with
the maximum material requirement specified, where taper minus (TM) shall apply.
6 Dr aft angles (taper)
If indicated in the general drawing indication, see Clause 11, and if not otherwise individually indicated,
the draft angles (taper) in accordance with Tables 2 to 6 apply.
They apply to the longer feature in the direction of taper. For the shorter feature, if any, taper to fit
applies, see ISO 10135. The taper applies as continuously increasing the tolerance (not increasing the
nominal shape).
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(E)
Table 2 — Draft angles for hand moulding casting
Nominal height Grade A (DA) Grade B (DB)
range of feature for
External Internal External Internal
draft value
> 0 ≤ 4 6,9° (0,4 mm) 8,3° (0,5 mm) 8,8° (0,6 mm) 10,7° (0,7 mm)
> 4 ≤ 6,3 6,5° (0,6 mm) 7,5° (0,7 mm) 5,2° (0,7 mm) 9,3° (0,8 mm)
> 6,3 ≤ 10 4,8° (0,7 mm) 5,4° (0,8 mm) 5,7° (0,8 mm) 7,5° (1,0 mm)
> 10 ≤ 16 3,2° (0,7 mm) 4,1° (0,9 mm) 4,7° (1,0 mm) 5,7° (1,3 mm)
> 16 ≤ 25 2,6° (0,9 mm) 3,0° (1,1 mm) 3,2° (1,1 mm) 4,4° (1,6 mm)
> 25 ≤ 40 2,2° (1,1 mm) 2,9° (1,6 mm) 3,0° (1,5 mm) 4,1° (2,2 mm)
> 40 ≤ 63 1,9° (1,5 mm) 2,4° (2,1 mm) 2,6° (2,1 mm) 3,3° (2,8 mm)
> 63 ≤ 100 1,4° (1,8 mm) 2,0° (2,6 mm) 2,0° (2,4 mm) 2,7° (3,6 mm)
> 100 ≤ 160 1,0° (2,2 mm) 1,5° (3,2 mm) 1,4° (3,0 mm) 2,0° (4,3 mm)
> 160 ≤ 250 0,8° (2,8 mm) 1,2° (4,0 mm) 1,2° (4,0 mm) 1,6° (5,5 mm)
> 250 ≤ 400 0,7° (3,1 mm) 0,9° (5,0 mm) 0,9° (4,5 mm) 1,3° (6,8 mm)
> 400 ≤ 630 0,5° (4,7 mm) 0,8° (6,5 mm) 0,7° (6,3 mm) 1,0° (8,7 mm)
> 630 ≤ 1 000 0,5° (7,0 mm) 0,7° (9,0 mm) 0,7° (9,5 mm) 0,9° (12,5 mm)
> 1 000 ≤ 1 600 0,4° (9,0 mm) 0,5° (11,5 mm) 0,5° (11,5 mm) 0,7° (14,5 mm)
Table 3 — Draft angles for machine moulding casting
Nominal height range Grade A (DA) Grade B (DB)
of feature for draft
External Internal External Internal
value
> 0 ≤ 4 5,8° (0,4 mm) 6,8° (0,5 mm) 7,4° (0,5 mm) 8,6° (0,6 mm)
> 4 ≤ 6,3 5,3° (0,5 mm) 6,0° (0,5 mm) 6,7° (0,6 mm) 7,5° (0,7 mm)
> 6,3 ≤ 10 3,9° (0,5 mm) 4,4° (0,6 mm) 4,7° (0,7 mm) 6,0° (0,8 mm)
> 10 ≤ 16 2,7° (0,6 mm) 3,2° (0,7 mm) 3,9° (0,9 mm) 4,5° (1,0 mm)
> 16 ≤ 25 2,2° (0,8 mm) 2,5° (0,9 mm) 2,8° (1,0 mm) 3,5° (1,2 mm)
> 25 ≤ 40 2,0° (1,1 mm) 2,4° (1,3 mm) 2,7° (1,5 mm) 3,3° (1,8 mm)
> 40 ≤ 63 1,6° (1,4 mm) 1,9° (1,7 mm) 2,0° (1,8 mm) 2,6° (2,2 mm)
> 63 ≤ 100 1,2° (1,7 mm) 1,6° (2,1 mm) 1,6° (2,2 mm) 2,2° (3,0 mm)
> 100 ≤ 160 1,0° (2,3 mm) 1,3° (2,8 mm) 1,3° (2,9 mm) 1,8° (3,9 mm)
> 160 ≤ 250 0,9° (3,0 mm) 1,1° (3,9 mm) 1,2° (4,1 mm) 1,6° (5,4 mm)
> 250 ≤ 400 0,8° (4,3 mm) 1,0° (5,4 mm) 1,1° (5,8 mm) 1,4° (7,4 mm)
> 400 ≤ 630 0,7° (6,2 mm) 0,9° (7,7 mm) 0,9° (7,9 mm) 1,1° (9,8 mm)
> 630 ≤ 1 000 0,5° (7,0 mm) 0,7° (9,0 mm) 0,7° (9,5 mm) 0,9° (12,5 mm)
> 1 000 ≤ 1 600 0,4° (9,0 mm) 0,5° (11,5 mm) 0,5° (11,5 mm) 0,7° (14,5 mm)
Table 4 — Draft angles for permanent moulding casting
Grade A (DA) Grade B (DB)
Nominal height range of
feature for draft
External Internal External Internal
value
draft value draft value draft value 2 draft value 2
— ≤ 4 8,5° (0,3 mm) 11,3° (0,4 mm) 11,3° (0,4 mm) 11,3° (0,4 mm)
> 4 ≤ 6,3 3,3° (0,3 mm) 5,6° (0,5 mm) 5,6° (0,5 mm) 5,6° (0,5 mm)
> 6,3 ≤ 10 3,5° (0,5 mm) 4,9° (0,7 mm) 4,9° (0,7 mm) 5,6° (0,8 mm)
> 10 ≤ 16 3,1° (0,7 mm) 1,4° (1,0 mm) 3,5° (0,8 mm) 5,3° (1,2 mm)
> 16 ≤ 25 2,8° (1,0 mm) 3,9° (1,4 mm) 3,4° (1,2 mm) 4,5° (1,6 mm)
5
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SIST EN ISO 8062-3:2023
ISO 8062-3:2023(E)
TTabablele 4 4 ((ccoonnttiinnueuedd))
Grade A (DA) Grade B (DB)
Nominal height range of
feature for draft
External Internal External Internal
value
draft value draft value draft value 2 draft value 2
> 25 ≤ 40 2,5° (1,4 mm) 3,5° (2,0 mm) 3,2° (1,8 mm) 4,1° (2,3 mm)
> 40 ≤ 63 2,2° (2,0 mm) 2,8° (2,5 mm) 2,8° (2,5 mm) 3,6° (3,2 mm)
> 63 ≤ 100 1,8° (2,5 mm) 2,8° (4,0 mm) 2,5°
...
SLOVENSKI STANDARD
oSIST prEN ISO 8062-3:2019
01-september-2019
Specifikacija geometrijskih veličin izdelka (GPS) - Dimenzijske in geometrijske
tolerance zaformanih delov - 3. del: Splošne dimenzijske in geometrijske tolerance
ter dodatki za obdelavo ulitkov (ISO/DIS 8062-3:2019)
Geometrical product specifications (GPS) - Dimensional and geometrical tolerances for
moulded parts - Part 3: General dimensional and geometrical tolerances and machining
allowances for castings (ISO/DIS 8062-3:2019)
Geometrische Produktspezifikationen (GPS) - Maß-, Form- und Lagetoleranzen für
Formteile - Teil 3: Allgemeine Maß-, Form- und Lagetoleranzen und
Bearbeitungszugaben für Gussstücke (ISO/DIS 8062-3:2019)
Spécification géométrique des produits (GPS) - Tolérances dimensionnelles et
géométriques des pièces moulées - Partie 3: Tolérances dimensionnelles et
géométriques générales et surépaisseurs d'usinage pour les pièces moulées (ISO/DIS
8062-3:2019)
Ta slovenski standard je istoveten z: prEN ISO 8062-3
ICS:
17.040.10 Tolerance in ujemi Limits and fits
17.040.40 Specifikacija geometrijskih Geometrical Product
veličin izdelka (GPS) Specification (GPS)
oSIST prEN ISO 8062-3:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 8062-3:2019
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oSIST prEN ISO 8062-3:2019
DRAFT INTERNATIONAL STANDARD
ISO/DIS 8062-3
ISO/TC 213 Secretariat: BSI
Voting begins on: Voting terminates on:
2019-06-18 2019-09-10
Geometrical product specifications (GPS) — Dimensional
and geometrical tolerances for moulded parts —
Part 3:
General dimensional and geometrical tolerances and
machining allowances for castings
Spécification géométrique des produits (GPS) — Tolérances dimensionnelles et géométriques des pièces
moulées —
Partie 3: Tolérances dimensionnelles et géométriques générales et surépaisseurs d'usinage pour les pièces
moulées
ICS: 17.040.10
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 8062-3:2019(E)
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 SUPPORTING DOCUMENTATION. ISO 2019
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oSIST prEN ISO 8062-3:2019
ISO/DIS 8062-3:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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
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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 2019 – All rights reserved
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oSIST prEN ISO 8062-3:2019
ISO/DIS 8062-3:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols . 2
5 Tolerance grades . 2
5.1 General . 2
5.2 Dimensional casting tolerance grades (DCTG) . 2
5.3 Geometrical casting tolerance grades (GCTG) . 3
5.3.1 General. 3
5.3.2 Nominal dimensions . 4
5.3.3 Datums. 4
6 Surface mismatch (SMI) . 6
7 Wall thickness . 7
8 Required machining allowances (RMA) . 7
8.1 General . 7
8.2 Required machining allowance grades (RMAG). 7
9 Indication on drawings . 8
9.1 Indication of general dimensional casting tolerances . 8
9.2 Indication of machining allowances . 9
9.3 Indication of geometrical casting tolerances . 9
10 Rejection .10
Annex A (informative) Casting tolerances and geometrical tolerances .11
Annex B (informative) Required machining allowance grades (RMAG).14
Annex C (informative) Concept of general tolerancing of characteristics .15
Annex D (informative) Datums for general geometrical tolerances.17
Annex E (informative) Application of general geometrical tolerances for castings .21
Annex F (informative) Relation to the GPS matrix model .29
Bibliography .30
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oSIST prEN ISO 8062-3:2019
ISO/DIS 8062-3:2019(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 of 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 www .iso
.org/iso/foreword .html.
This document was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product
specifications and verification.
This second edition cancels and replaces the first edition (ISO 8062-3:2007), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— clarification of inconsistencies.
A list of all parts in the ISO 8062- series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
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oSIST prEN ISO 8062-3:2019
ISO/DIS 8062-3:2019(E)
Introduction
This document is a geometrical product specification (GPS) standard and is regarded as a
complementary process-specific tolerance standard (see ISO 14638). It influences chain link A, B and C
of the chain of standards on mouldings.
For more detailed information on the relation of this standard to other standards and the GPS matrix
model, see Annex F.
This part of ISO 8062 defines a system of tolerance grades and machining allowance grades for cast
metals and their alloys. Guidance on its application is given in ISO/TS 8062-2.
It is noted that the dimensional specifications introduced by the application of ISO 8062-3 can be
ambiguous, when it is applied to a dimension which is not a size (see ISO 14405-2).
The specified system applies if the manufacturer provides a pattern or die equipment or accepts
responsibility for proving it.
The tolerances specified for a casting may determine the casting method. It is therefore recommended,
before the design or the order is finalized, that the customer liaises with the foundry to discuss:
a) the proposed casting design and accuracy required;
b) machining requirements;
c) method of casting;
d) location of the parting surfaces and the necessary draft angles;
e) the number of castings to be manufactured;
f) the casting equipment involved;
g) the consequences of the wear out of the equipment during its life cycle;
h) datum system according to ISO 5459;
i) casting alloy;
j) any special requirements, for instance, individual dimensional and geometrical tolerances, fillet
radii, tolerances and individual machining allowances;
Because the dimensional and geometrical accuracy of a casting is related to production factors,
tolerance grades which can be achieved for various methods and metals are described in Annex A.
k) dimensional tolerances for long series and mass production, where development, adjustment and
maintenance of casting equipment make it possible to achieve close tolerances;
l) dimensional tolerances for short series and single production;
m) geometrical tolerances.
Information on typical required machining allowance grades is given in Annex B.•
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oSIST prEN ISO 8062-3:2019
DRAFT INTERNATIONAL STANDARD ISO/DIS 8062-3:2019(E)
Geometrical product specifications (GPS) — Dimensional
and geometrical tolerances for moulded parts —
Part 3:
General dimensional and geometrical tolerances and
machining allowances for castings
1 Scope
This part of ISO 8062 specifies general dimensional and geometrical tolerances as well as machining
allowance grades for castings as delivered to the purchaser in accordance with ISO 8062-2. It is
applicable for tolerancing of dimensions and geometry of castings in all cast metals and their alloys
produced by various casting manufacturing processes.
This part of ISO 8062 applies to both general dimensional and general geometrical tolerances (referred
to in or near the title block of the drawing), unless otherwise specified and where specifically referred
to on the drawing by one of the references in clause 9.
The dimensional tolerances covered by this part of ISO 8062 are tolerances for linear dimensions.
The geometrical tolerances covered by this part of ISO 8062 are: Tolerances for straightness, flatness,
roundness, parallelism, perpendicularity, symmetry and coaxiality.
This part of ISO 8062 can be used for the selection of tolerance values for individual indications.
NOTE This part of ISO 8062 does not apply to 3D CAD models used without indicated dimensions.
2 Normative references
The following 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 129-1, Technical product documentation (TPD) — Presentation of dimensions and tolerances — Part 1:
General principles
ISO 1101, Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form,
orientation, location and run-out
ISO 1302, Geometrical Product Specifications (GPS) — Indication of surface texture in technical product
documentation
ISO 5459, Geometrical product specifications (GPS) — Geometrical tolerancing — Datums and datum systems
ISO 8015, Geometrical product specifications (GPS) — Fundamentals — Concepts, principles and rules
ISO 8062-1, Geometrical product specifications (GPS) — Dimensional and geometrical tolerances for
moulded parts — Part 1: Vocabulary
ISO 10135, Geometrical product specifications (GPS) — Drawing indications for moulded parts in technical
product documentation (TPD)
ISO 10579, Geometrical product specifications (GPS) — Dimensioning and tolerancing — Non-rigid parts
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3 Terms and definitions
For the purpose of this part of ISO 8062, the terms and definitions given in ISO 8062-1, ISO 1101,
ISO 5459 and ISO 10135 apply.
4 Symbols
For the purposes of this International Standard, the symbols of Table 1 apply.
Table 1 — Symbols
Symbol Interpretation Reference
DCT Dimensional casting tolerance 5.2
DCTG Dimensional casting tolerance grade 5.2
GCT Geometrical casting tolerance 5.3
GCTG Geometrical casting tolerance grade 5.3
RMA Required machining allowance 8
RMAG Required machining allowance grade 8
TP Taper + ISO 10135
TM Taper - ISO 10135
SMI Surface mismatch ISO 10135
5 Tolerance grades
5.1 General
Individual general dimensional and geometrical tolerances shall be indicated according to the relevant
GPS standards on dimensional and geometrical tolerancing.
If using general tolerances, it is necessary to investigate whether for functional reasons smaller
tolerances or for economical reasons larger tolerances are needed (see Annex C). In both cases,
individual tolerances are to be indicated.
For drawings where the tolerances according to this part of ISO 8062 apply in a specified restrained
condition only, ISO 10579 shall be referred to on the drawing.
5.2 Dimensional casting tolerance grades (DCTG)
16 dimensional casting tolerance grades are defined and designated DCTG 1 to DCTG 16 (see Table 2).
NOTE 1 For wall thicknesses, see clause 7.
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oSIST prEN ISO 8062-3:2019
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Table 2 — Linear dimensional casting tolerances (DCT)
All dimensions in millimetres
Nominal
dimensions
Linear dimensional tolerance
related to
a)
for dimensional casting tolerance grade (DCTG)
the mould-
ed part
up to
and
DCTG DCTG DCTG DCTG DCTG DCTG DCTG DCTG DCTG DCTG DCTG DCTG DCTG DCTG DCTG DCTG
above in-
b)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
clud-
ing
- 10 0,09 0,13 0,18 0,26 0,36 0,52 0,74 1 1,5 2 2,8 4,2 - - - -
10 16 0,1 0,14 0,2 0,28 0,38 0,54 0,78 1,1 1,6 2,2 3 4,4 - - - -
16 25 0,11 0,15 0,22 0,3 0,42 0,58 0,82 1,2 1,7 2,4 3,2 4,6 6 8 10 12
25 40 0,12 0,17 0,24 0,32 0,46 0,64 0,9 1,3 1,8 2,6 3,6 5 7 9 11 14
40 63 0,13 0,18 0,26 0,36 0,5 0,7 1 1,4 2 2,8 4 5,6 8 10 12 16
63 100 0,14 0,2 0,28 0,4 0,56 0,78 1,1 1,6 2,2 3,2 4,4 6 9 11 14 18
100 160 0,15 0,22 0,3 0,44 0,62 0,88 1,2 1,8 2,5 3,6 5 7 10 12 16 20
160 250 - 0,24 0,34 0,5 0,7 1 1,4 2 2,8 4 5,6 8 11 14 18 22
250 400 - - 0,4 0,56 0,78 1,1 1,6 2,2 3,2 4,4 6,2 9 12 16 20 25
400 630 - - - 0,64 0,9 1,2 1,8 2,6 3,6 5 7 10 14 18 22 28
630 1000 - - - - 1 1,4 2 2,8 4 6 8 11 16 20 25 32
1000 1600 - - - - - 1,6 2,2 3,2 4,6 7 9 13 18 23 29 37
1600 2500 - - - - - - 2,6 3,8 5,4 8 10 15 21 26 33 42
2500 4000 - - - - - - - 4,4 6,2 9 12 17 24 30 38 49
4000 6300 - - - - - - - - 7 10 14 20 28 35 44 56
6300 10000 - - - - - - - - - 11 16 23 32 40 50 64
a) For wall thicknesses in grade DCTG 1 to DCTG 15, one grade coarser applies (see clause 7).
b) Grade DCTG 16 exists only for wall thicknesses of castings generally specified to DCTG 15.
NOTE 2 Annex A gives recommendations for the application of the above tolerance grades.
As the default conditions for dimensions, the casting tolerance shall be symmetrically disposed with
respect to the nominal dimension, i. e. with one half on the positive side and one half on the negative side.
If agreed between manufacturer and purchaser for specific reasons, the casting tolerance may
be asymmetric. In such a case the casting tolerance shall be stated individually, in accordance with
ISO 129-1, following the nominal dimensions of the final moulded part.
NOTE 3 In pressure die casting an asymmetric tolerance disposition is often applied because of special
technical reasons.
NOTE 4 In case of a draft angle the nominal dimension is modified by the draft angle (TP or TM).
5.3 Geometrical casting tolerance grades (GCTG)
5.3.1 General
Seven geometrical casting tolerance grades (GCTG) are defined and designated GCTG 2 to GCTG 8 (see
Tables 3 to 6).
NOTE GCT values are not given for grade GCTG 1. This grade is reserved for finer values which may be
required in the future.
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ISO/DIS 8062-3:2019(E)
General tolerances on form (straightness, flatness, roundness) and on orientation (parallelism,
perpendicularity) do not apply to features with draft. These features need individual indicated
tolerances according to the function and to the manufacturer’s advice.
Other geometrical tolerances than those given in tables 3 to 6 (e. g. profile, position, common zone
flatness) are to be indicated individually.
Therefore, it is recommended to acquire the information about the design of the mould regarding the
location of the parting surfaces and the amount of draft applied to the features from the manufacturer
in order to complete the drawing, see Introduction.
5.3.2 Nominal dimensions
The nominal dimension to be used in Tables 3 to 6 shall be the longest nominal dimension of the
considered integral feature of the moulded part, disregarding the nominal dimension of not individually
indicated fillets and chamfers.
NOTE 1 Integral feature (see ISO 17450-1) means the real surface which can be touched physically. The
longest nominal dimension in case of a cylinder is diameter or length, in case of rectangular planar surface it is
the longest side.
NOTE 2 This definition is not applicable for 3D shapes.
5.3.3 Datums
5.3.3.1 Datums for general orientation tolerances
For general orientation tolerances according to ISO 8062-3 a datum system is to be specified on the
drawing and to be identified by the indication “ISO 8062-3 DS” in or near the title block of the drawing
as shown in Figure 1.
Figure 1 — Drawing indication for the datum system for general orientation tolerances
according to ISO 8062-3
NOTE This datum system does not apply to general geometrical tolerances on coaxiality and symmetry, see
5.3.3.2 and 5.3.3.3.
5.3.3.2 Datums for general coaxiality tolerances
For datums of general coaxiality tolerances the following applies:
— if one cylindrical feature (internal or external) extends over the whole length of all other cylindrical
coaxial features this feature axis applies as the (single) datum, see Annex D Figure D.1;
— otherwise a common datum applies, composed of the axes of the two most separated features on the
considered drawing centre line, see Annex D Figure D.2; if more than one possibility exist (e. g. inner
or outer features), the feature with the largest diameter applies, see Annex D Figure D.3.
The general tolerances for coaxiality apply also to the datum features themselves, if a common datum
applies.
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5.3.3.3 Datums for general symmetry tolerances
For datums of general symmetry tolerances the following applies:
— if one feature of size (internal or external), composed of two parallel opposite planes, extends over
the whole length of all other co-symmetrical features this feature median plane applies as the
(single) datum, see Annex D Figure D.4;
— otherwise a common datum applies, composed of the median planes of the two most separated
features on the considered drawing centre line (plane), see Annex D Figure D.5; if more than one
possibility exist, the feature with the largest size applies, see Annex D Figure D.6. One of the two
datum features may be cylindrical, see Annex D Figure D.7.
The general tolerances for symmetry apply also to the datum features themselves, if a common datum
applies.
Table 3 — Casting tolerances for straightness
All dimensions in millimetres
Nominal dimension
Straightness tolerance
of the considered
for geometrical casting tolerance grade (GCTG)
integral feature
up to and
above GCTG 2 GCTG 3 GCTG 4 GCTG 5 GCTG 6 GCTG 7 GCTG 8
including
10 10 0,08 0,12 0,18 0,27 0,4 0,6 0,9
30 30 0,12 0,18 0,27 0,4 0,6 0,9 1,4
100 100 0,18 0,27 0,4 0,6 0,9 1,4 2
300 300 0,27 0,4 0,6 0,9 1,4 2 3
1000 1000 0,4 0,6 0,9 1,4 2 3 4,5
3000 3000 - - - 3 4 6 9
6000 6000 - - - 6 8 12 18
10000 - - - 12 16 24 36
Table 4 — Casting tolerances for flatness
All dimensions in millimetres
Longest nominal
dimension of the Flatness tolerance
considered inte- for geometrical casting tolerance grade (GCTG)
gral feature
up to and
above GCTG 2 GCTG 3 GCTG 4 GCTG 5 GCTG 6 GCTG 7 GCTG 8
including
10 10 0,12 0,18 0,27 0,4 0,6 0,9 1,4
30 30 0,18 0,27 0,4 0,6 0,9 1,4 2
100 100 0,27 0,4 0,6 0,9 1,4 2 3
300 300 0,4 0,6 0,9 1,4 2 3 4,5
1000 1000 0,6 0,9 1,4 2 3 4,5 7
3000 3000 - - - 4 6 9 14
6000 6000 - - - 8 12 18 28
10000 - - - 16 24 36 56
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Table 5 — Casting tolerances for roundness, parallelism, perpendicularity and symmetry
All dimensions in millimetres
Longest nominal
dimension of the Tolerance
considered integral for geometrical casting tolerance grade (GCTG)
feature
Up to and
above GCTG 2 GCTG 3 GCTG 4 GCTG 5 GCTG 6 GCTG 7 GCTG 8
including
10 10 0,18 0,27 0,4 0,6 0,9 1,4 2
30 30 0,27 0,4 0,6 0,9 1,4 2 3
100 100 0,4 0,6 0,9 1,4 2 3 4,5
300 300 0,6 0,9 1,4 2 3 4,5 7
1000 1000 0,9 1,4 2 3 4,5 7 10
3000 3000 - - - 6 9 14 20
6000 6000 - - - 12 18 28 40
10000 - - - 24 36 56 80
Table 6 — Casting tolerances for coaxiality
All dimensions in millimetres
Longest nominal
dimension of the Coaxiality tolerance
considered integral for geometrical casting tolerance grade (GCTG)
feature
up to and
above GCTG 2 GCTG 3 GCTG 4 GCTG 5 GCTG 6 GCTG 7 GCTG 8
including
10 10 0,27 0,4 0,6 0,9 1,4 2 3
30 30 0,4 0,6 0,9 1,4 2 3 4,5
100 100 0,6 0,9 1,4 2 3 4,5 7
300 300 0,9 1,4 2 3 4,5 7 10
1000 1000 1,4 2 3 4,5 7 10 15
3000 3000 - - - 9 14 20 30
6000 6000 - - - 18 28 40 60
10000 - - - 36 56 80 120
Other geometrical tolerances are to be indicated by individually indicated geometrical tolerances.
6 Surface mismatch (SMI)
As default condition, the surface mismatch A is controlled indirectly by the control of the linear
dimensions according to Table 2, see Figure 2, therefore the surface mismatch may vary between zero
and the value given in Table 2 depending on the actual local sizes of the feature.
On features without draft, surface mismatch is also controlled and therefore included in form tolerances
for straightness, flatness and roundness given in Tables 3 to 5.
NOTE This is an overruling of the principle of independency. This is because it is often not known whether a
parting line exists and, if so, whether the particular feature is affected.
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Key
A Surface mismatch
B Minimum dimension
C Maximum dimension
Figure 2 — Limitation of surface mismatch by linear dimension
If it is necessary to restrict further the value of the surface mismatch, the maximum permissible surface
mismatch, SMI, shall be stated individually according to ISO 10135.
7 Wall thickness
As the default condition, the tolerance for wall thickness in grades DCTG 1 to DCTG 15 shall be one grade
coarser than the general tolerance for other dimensions; for example, if there is a general tolerance on a
drawing of DCTG 10, the tolerance on wall thicknesses shall be DCTG 11.
8 Required machining allowances (RMA)
8.1 General
As a general condition, the specified required machining allowance grades, RMAG, according to this
part of ISO 8062 (see clause 9) applies for the entire final moulded part, i. e. only one value is specified
for all surfaces to be machined, and this value shall be selected from the appropriate dimension range
according to the largest overall dimension (see Table 7).
In sand casting, top surfaces may need more machining allowance than other surfaces. For these
surfaces coarser RMA grades can be selected. Individual machining allowances shall be indicated
according to ISO 1302.
8.2 Required machining allowance grades (RMAG)
10 grades of required machining allowance grades are defined and designated RMAG A to RMAG K (see
Table 7).
NOTE Grades recommended for particular alloys and manufacturing methods are shown in Table B.1 for
information only.
© ISO 2019 – All rights reserved 7
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oSIST prEN ISO 8062-3:2019
ISO/DIS 8062-3:2019(E)
Table 7 — Required machining allowance
All dimensions in millimetres
Largest overall Machinin
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