SIST-TS CEN ISO/TS 8062-2:2014

SLOVENSKI STANDARD
01-marec-2014
Specifikacija geometrijskih veličin izdelka (GPS) - Dimenzijske in geometrijske
tolerance za formane dele - 2. del: Pravila (ISO/TS 8062-2:2013, popravljena
različica 2013-11-01)
Geometrical Product Specifications (GPS) - Dimensional and geometrical tolerances for
moulded parts - Part 2: Rules (ISO/TS 8062-2:2013, Corrected version 2013-11-01)
Geometrische Produktspezifikationen (GPS) - Maß-, Form- und Lagetoleranzen für
Formteile - Teil 2: Regeln (ISO/TS 8062-2:2013, korrigierte Fassung 2013-11-01)
Spécification géométrique des produits (GPS) - Tolérances dimensionnelles et
géométriques des pièces moulées - Partie 2: Règles d'utilisation (ISO/TS 8062-2:2013,
Version corrigée 2013-11-01)
Ta slovenski standard je istoveten z: CEN ISO/TS 8062-2:2013
ICS:
17.040.10 Tolerance in ujemi Limits and fits
17.040.40 Specifikacija geometrijskih Geometrical Product
veličin izdelka (GPS) Specification (GPS)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CEN ISO/TS 8062-2
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
October 2013
ICS 17.040.10
English Version
Geometrical Product Specifications (GPS) - Dimensional and
geometrical tolerances for moulded parts - Part 2: Rules (ISO/TS
8062-2:2013, Corrected version 2013-11-01)
Spécification géométrique des produits (GPS) - Tolérances Geometrische Produktspezifikationen (GPS) - Maß-, Form-
dimensionnelles et géométriques des pièces moulées - und Lagetoleranzen für Formteile - Teil 2: Regeln (ISO/TS
Partie 2: Règles d'utilisation (ISO/TS 8062-2:2013, Version 8062-2:2013, korrigierte Fassung 2013-11-01)
corrigée 2013-11-01)
This Technical Specification (CEN/TS) was approved by CEN on 21 May 2010 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TS 8062-2:2013 E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (CEN ISO/TS 8062-2:2013) 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO/TS 8062-2:2013, Corrected version 2013-11-01 has been approved by CEN as CEN ISO/TS
8062-2:2013 without any modification.

TECHNICAL ISO/TS
SPECIFICATION 8062-2
First edition
2013-07-01
Corrected version
2013-11-01
Geometrical product specifications
(GPS) — Dimensional and geometrical
tolerances for moulded parts —
Part 2:
Rules
Spécification géométrique des produits (GPS) — Tolérances
dimensionnelles et géométriques des pièces moulées —
Partie 2: Règles d’utilisation
Reference number
ISO/TS 8062-2:2013(E)
©
ISO 2013
ISO/TS 8062-2:2013(E)
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO/TS 8062-2:2013(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols . 3
5 Designation on drawings . 5
6 Drawing type indicator . 5
6.1 Single and combined drawings . 5
6.2 Final moulded part drawings . 5
6.3 Intermediate machined moulded part drawings . 6
6.4 Final machined moulded part drawings . 6
6.5 Identifier for machining by the supplier . 6
7 Drawing indications . 7
7.1 Surface texture symbols . 7
7.2 Part condition identifiers . 7
7.3 Required machining allowance, RMA .11
8 Indication of general tolerances .12
8.1 General tolerances according to ISO 8062-3 .12
8.2 General surface profile tolerance .12
9 Types of specifications .12
9.1 General .12
9.2 Specification of final moulded-part condition .12
9.3 Specification of intermediate machined moulded-part conditions .13
9.4 Specification of final machined moulded-part condition .14
10 Tolerancing .15
10.1 General .15
10.2 Tolerancing of final moulded parts .15
10.3 Tolerancing of intermediate machined moulded parts.15
10.4 Tolerancing of final machined moulded part .16
Annex A (normative) Proportions and dimensions of graphical symbols .20
Annex B (informative) Accumulation method, relationship between moulded part and machined
moulded part .22
Annex C (informative) Calculation of moulded part nominal dimensions of features to
be machined .27
Annex D (informative) Examples for the multiple tolerancing method .29
Annex E (informative) Drawing examples .42
Annex F (informative) Task assignment .52
Annex G (informative) Relation to the GPS matrix model .55
Bibliography .57
ISO/TS 8062-2:2013(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. 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. 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.
The committee responsible for this document is ISO/TC 213, Dimensional and geometrical product
specifications and verification.
ISO 8062 consists of the following parts, under the general title Geometrical product specifications
(GPS) — Dimensional and geometrical tolerances for moulded parts:
— Part 1: Vocabulary
— Part 2: Rules [Technical Specification]
— Part 3: General dimensional and geometrical tolerances and machining allowances for castings
The following part is under preparation:
— Part 4: General tolerances for castings (according to the GPS rules)
This corrected version of ISO 8062:2013 incorporates a change in 7.2.2, Figure 8.
iv © ISO 2013 – All rights reserved

ISO/TS 8062-2:2013(E)
Introduction
This part of ISO 8062 is to be regarded as a complementary process-specific tolerance geometrical
production specification (GPS) standard (see ISO/TR 14638). It influences chain links 1, 2 and 3 of the
chain of standards on mouldings.
The ISO/GPS Masterplan given in ISO/TR 14638 gives an overview of the ISO/GPS system of which this
document is a part. The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and
the default decision rules given in ISO 14253-1 apply to specifications made in accordance with this
document, unless otherwise indicated.
For more detailed information about the relation of this part of ISO 8062 to other standards and the GPS
matrix model, see Annex F.
This part of ISO 8062 takes into account experiences with the application of previous standards
(e.g. ISO 8062:1994, ASME Y14-8M:1996, and ISO 1101).
The tolerancing methods in this part of ISO 8062 are not yet fully developed within the new approach of
geometrical product specifications (GPS) according to ISO 17450. The requirements for castings (mainly
due to the uncertainty in the calculation of the shrinking of the casting) remain incompatible with
the GPS standards. Therefore, this Technical Specification has been issued in order to gather further
experience in the tolerancing of castings.
It is intended that the next version of this document will include more realistic ways of calculating the
nominal dimension d of the final moulded part by elaborating GPS-conformant ways of combining
C
linear dimensions and tolerance zones.
This document is intended to cover all types of moulded parts. However, most of the examples refer to
castings.
When the methods of this part of ISO 8062 are used in 3D models, provisions have to be made in order
to distinguish between theoretically exact dimensions (TEDs) and linear and angular dimensions with
plus/minus tolerances.
TECHNICAL SPECIFICATION ISO/TS 8062-2:2013(E)
Geometrical product specifications (GPS) — Dimensional
and geometrical tolerances for moulded parts —
Part 2:
Rules
1 Scope
This part of ISO 8062 gives the rules for geometrical dimensioning and tolerancing of final moulded
parts and parts machined out of moulded parts. It also gives rules and conventions for the indications of
these requirements in technical product documentation and specifies the proportions and dimensions
of the graphical symbols to be used.
This part of ISO 8062 provides symbols which may be used to identify the relative completeness of
the moulded features and parts. These graphical symbols should not be confused with the graphical
symbols for surface texture according to ISO 1302, which are notably larger.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 129-1, Technical drawings — Indication 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 2692, Geometrical product specifications (GPS) — Geometrical tolerancing — Maximum material
requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR)
ISO 5458, Geometrical Product Specifications (GPS) — Geometrical tolerancing — Positional tolerancing
ISO 5459, Geometrical product specifications (GPS) — Geometrical tolerancing — Datums and datum systems
ISO 7083, Technical drawings — Symbols for geometrical tolerancing — Proportions and dimensions
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 8062-3:2007, Geometrical product specifications (GPS) — Dimensional and geometrical tolerances for
moulded parts — Part 3: General dimensional and geometrical tolerances and machining allowances for castings
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
ISO 13715, Technical drawings — Edges of undefined shape — Vocabulary and indications
ISO/TS 8062-2:2013(E)
ISO 14405-2,Geometrical product specifications (GPS) — Dimensional tolerancing — Part 2: Dimensions
other than linear sizes
ISO 17450-1,Geometrical product specifications (GPS) — General concepts — Part 1: Model for geometrical
specification and verification
ISO 81714-1, Design of graphical symbols for use in the technical documentation of products — Part 1: Basic rules
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8062-1, ISO 1101, ISO 5459,
ISO 17450-1 and the following apply.
3.1
moulded feature
feature which has not been machined on a moulded part
3.2
intermediate machined feature
feature of a moulded part which has undergone machining and which subsequently
will be machined to its final condition
Note 1 to entry: An intermediate machined feature is typically a roughly machined moulded feature (3.1).
Note 2 to entry: An intermediate machined feature can be used as a datum for subsequent machining of the
moulded part.
3.3
final machined feature
feature of a moulded part which has been machined to its final condition
3.4
final moulded part
moulded part after fettling (if any)
Note 1 to entry: A final moulded part only consists of features which are moulded and have not been finished
except by fettling.
3.5
intermediate machined moulded part
moulded part which has undergone some machining and which subsequently will be machined further
Note 1 to entry: An intermediate machined moulded part consists of at least one moulded feature (3.1) to be
subsequently machined or at least one intermediate machined feature (3.2). In addition, it consists of moulded
features not to be machined (if any) and final machined features (3.3) (if any).
Note 2 to entry: An intermediate machined moulded part can be produced from a final moulded part or from
another intermediate machined moulded part.
3.6
final machined moulded part
moulded part which has been machined to its final condition
Note 1 to entry: A final machined moulded part consists of final machined features (3.3) and can include moulded features
(3.1) not to be machined. A final machined moulded part cannot include intermediate machined moulded features.
Note 2 to entry: A final machined moulded part can be produced from a final moulded part (3.4) or from an
intermediate machined moulded part (3.5).
2 © ISO 2013 – All rights reserved

ISO/TS 8062-2:2013(E)
3.7
moulded-part condition
manufacturing stage of a moulded part
Note 1 to entry: Listed in chronological order of manufacturing, a moulded part can be in a final moulded-part (3.4)
condition, intermediate machined moulded-part (3.5) condition or final machined moulded-part (3.6) condition.
Note 2 to entry: Only one final moulded-part condition exists.
Note 3 to entry: Various intermediate machined moulded-part conditions can exist.
Note 4 to entry: Only one final machined moulded-part condition can exist.
Note 5 to entry: A moulded part does not need to exist in an intermediate machined moulded-part condition
before the final machined moulded-part condition.
Note 6 to entry: Heat treatment or straightening (correction of unintended distortion) can be carried out in any
moulded-part condition.
3.8
single drawing
drawing of a moulded part giving requirements for one moulded-part condition only
3.9
combined drawing
drawing of a moulded part giving requirements for more than one moulded-
part condition
4 Symbols
See Table 1 for the letter symbols and Table 2 for the graphical symbols used in this document.
ISO/TS 8062-2:2013(E)
Table 1 — Letter symbols
Term, quantity Letter symbol
Required machining allowance A
RMA
Nominal dimension of the final moulded part d
C
Nominal dimension of the final machined moulded part d
M
Dimensional or size tolerance t
D
Machining tolerance t
M
Dimensional tolerance for the final machined moulded part t
DMT
Form tolerance t
F
Form tolerance for the final machined moulded part t
FMT
Form tolerance for the final moulded part
Specific form tolerance of geometrical casting tolerance (GCT) for the final moulded part
t
FCT
(casting)
Casting form tolerance
Dimensional tolerance for the final moulded part (casting) t
DCT
Geometrical tolerance for the final moulded part (casting) t
GCT
Cutting depth for machining c
Parallelism tolerance for the final moulded part (casting) t
PARC
Flatness tolerance for the final moulded part (casting) t
FLAC
Casting tolerance t
C
Positional tolerance t
POS
Orientation contribution value c
inclin
Length of datum l
d
Length of toleranced feature l
t
Surface profile tolerance t
PROF
Maximum material virtual size S
MMVS
Least material virtual size S
LMVS
Theoretical exact dimension TED
4 © ISO 2013 – All rights reserved

ISO/TS 8062-2:2013(E)
Table 2 — Graphical symbols
Graphical sym- Reference docu-
Name of symbol Clause
bol ment
Drawing identifier for final moulded part 6.2 ISO/TS 8062-2
Drawing identifier for intermediate machined moulded part 6.3 ISO/TS 8062-2
Drawing identifier for final machined moulded part 6.4 ISO/TS 8062-2
a
Identifier for machining by the supplier 6.5 ISO/TS 8062-2
Part condition identifier for final moulded part 7.2 ISO/TS 8062-2
Part condition identifier for intermediate machined
7.2 ISO/TS 8062-2
moulded part
Part condition identifier for final machined moulded part 7.2 ISO/TS 8062-2
Surface texture — removal of material not permitted 7.1.2 ISO 1302
Surface texture — removal of material required 7.1.3 ISO 1302
a
When there is a change in the allocation of the supplier, a change of the documentation may be necessary to reflect
this.
See Annex A for the proportions and dimensions of the graphical symbols referenced in this part of ISO 8062.
5 Designation on drawings
When drawing indications according to this part of ISO 8062 apply, the drawing shall be designated in
or near the drawing title block:
ISO/TS 8062-2
However, this reference is not required if general tolerances or required machining allowances according
to other parts of ISO 8062 are referenced.
6 Drawing type indicator
6.1 Single and combined drawings
The requirements for the three types of moulded-part conditions (final moulded, intermediate and final
machined) can be specified on a combined drawing or separately on single drawings as appropriate.
If use of the symbology in this document makes a combined drawing difficult to read, use single
drawings instead.
Information, as to which part condition or conditions the stated specifications on the drawing apply,
shall be indicated on the drawing in accordance with the following clauses; therefore the drawing shall
indicate which part condition(s) the stated specification applies to.
On combined drawings, only the outline of the most advanced part condition for which the drawing is
valid shall be illustrated. Requirements for the most advanced condition and for the preceding moulded-
part condition in question shall be stated.
6.2 Final moulded part drawings
If the drawing specifies requirements on a final moulded part, the graphical symbol given in Figure 1
shall be indicated in or near the drawing title block.
ISO/TS 8062-2:2013(E)
Figure 1 — Graphical symbol for a final moulded part drawing
6.3 Intermediate machined moulded part drawings
If the drawing specifies requirements on an intermediate machined moulded part, the graphical symbol
given in Figure 2 shall be indicated in or near the drawing title block.
Figure 2 — Graphical symbol for an intermediate machined moulded part drawing
If more than one intermediate machined moulded-part condition exist on the drawing, they shall be
numbered and indicated after the symbol (see Figure 3).
a) b) c)
Figure 3 — Examples of numbered intermediate machined moulded parts
If stating general tolerances on a single drawing of an intermediate machined moulded part, e.g. by
referencing ISO 8062-3 or by stating particular general tolerances, these general tolerances apply to the
moulded features in the intermediate machined moulded-part condition only.
6.4 Final machined moulded part drawings
If the drawing states requirements on a final machined moulded part, the graphical symbol given in
Figure 4 shall be indicated in or near the title block.
Figure 4 — Graphical symbol for final machined moulded part drawing
If stating general tolerances according to ISO 8062, e.g. by referencing ISO 8062-3 for castings, on a
drawing of a final machined moulded part, these general tolerances apply to the moulded surfaces in the
final machined moulded-part condition only.
6.5 Identifier for machining by the supplier
If there is, for some special reason, a need to identify which part condition specifications a supplier
is expected to meet, this can be indicated by the symbol as shown in Figure 5 after the drawing type
indicator (see Figure 6).
Figure 5 — Symbol for machining by the supplier
6 © ISO 2013 – All rights reserved

ISO/TS 8062-2:2013(E)
a) Combined drawing b) Single drawing c) Single drawing
Figure 6 — Example of SUP indication used together with the drawing type indicator near the
drawing title block
In any case, the contract shall clearly state which part condition and which specification the supplier
is expected to meet, irrespective of other part conditions and specifications appearing on the drawing.
7 Drawing indications
7.1 Surface texture symbols
On combined drawings, each surface shall be indicated with only one surface texture symbol according
to the condition of the surface in question on the most advanced part condition stated on the drawing.
7.2 Part condition identifiers
7.2.1 General
Three part condition identifiers are used for identifying which part condition a specification applies to
(see Figure 7).
for final moulded for intermediate machined for final machined
Figure 7 — Part condition identifiers
The part condition identifier may be omitted on single drawings.
The use of part condition identifiers is necessary on combined drawing to state requirements to
different part conditions (final moulded, intermediate machined moulded, final machined moulded), see
Figure E.7. More than one intermediate machined moulded-part condition may be specified. This being
the case, the intermediate machined moulded-part condition is enumerated in consecutive sequence
according to the manufacturing processes.
When a specification is given without a part condition identifier, this specification applies to all part
conditions stated on the drawing.
On combined drawings, requirements on features that remain as moulded in the most advanced part
condition according to the drawing may also be given. If not otherwise specified, this type of specification
applies to all part conditions according to the drawing, see Figure 8.
ISO/TS 8062-2:2013(E)
When a specification is given with an intermediate part condition, this specification applies for all
subsequent part conditions if not otherwise specified.
7.2.2 Surface texture
On combined drawings, surface texture requirements shall be indicated for each part condition using
the symbols as shown in Figure 8.
Drawing indication:
Meaning condition
final moulded
intermediate machined 1
intermediate machined 2
final machined
Figure 8 — Example of a surface texture indication on a combined drawing and its
interpretation
8 © ISO 2013 – All rights reserved

ISO/TS 8062-2:2013(E)
7.2.3 Linear dimensions
The part condition to which the linear dimension applies shall be indicated by a part condition identifier
as shown in Figure 9, if necessary.
b)  Intermediate machined c)  Final machined moulded
a)  Final moulded part
moulded part part
Figure 9 — Examples of nominal dimensions
7.2.4 Linear dimensions and individually indicated dimensional tolerances
The part condition to which the linear dimension with its tolerance applies shall be indicated by a part
condition identifier as shown in Figure 10, if necessary.
a)  Final moulded part b)  Intermediate machined c)  Final machined moulded
moulded part part
Figure 10 — Examples of nominal dimensions with individual tolerances
7.2.5 Theoretically exact dimensions
The part condition to which the theoretically exact dimension applies shall be indicated by a part
condition identifier as shown in Figure 11, if necessary.
a)  Final moulded part b)  Intermediate machined c)  Final machined moulded
moulded part part
Figure 11 — Examples of theoretically exact dimensions
ISO/TS 8062-2:2013(E)
7.2.6 Geometrical tolerances and datums
The part condition to which the geometrical tolerance applies, shall be indicated by a part condition
identifier as shown in Figure 12, if necessary.
a)  Final moulded part b)  Final machined c)  Final machined d)  Intermediate
moulded part moulded part machined moulded
part
Figure 12 — Examples of geometrical tolerances with datum references
The part condition identifier shall be indicated after the tolerance frame. If the datum exists in different
part conditions than those specified by the surface texture symbol, the datum applies in that part
condition stated together with the tolerance value (see Figures 13 and 14).
If the datum is specified to a planar feature in the final moulded-part condition and the feature has
a taper, the datum applies without the taper, i.e. the actual taper shall be removed mechanically or
virtually. If possible, planar surfaces with tapers should not be used as datums.
Key
1 final moulded part 3 datum A of final moulded part
2 intermediate machined moulded part 4 datum A of intermediate machined moulded part
Figure 13 — Example of a datum indication in different part conditions with different datums
10 © ISO 2013 – All rights reserved

ISO/TS 8062-2:2013(E)
Key
1 final moulded part 3 datum A of final moulded part
2 intermediate machined moulded part 4 datum A of intermediate machined moulded part
Figure 14 — Example of a datum indication in different part conditions with same datum
When a geometrical tolerance specification is given without a part condition identifier, this specification
applies to all part conditions stated on the drawing.
7.3 Required machining allowance, RMA
7.3.1 General
All required machining allowance values, A , are nominal values, and have no tolerance.
RMA
7.3.2 General required machining allowance
If a general required machining allowance is to apply to all surfaces to be machined on the final moulded
part, it shall be stated in or near the drawing title block according to ISO 8062-3, e.g.
General tolerances ISO 8062-3  RMA 6 (RMAG H)
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 of the final moulded part.
ISO 8062-3 contains standardized required machining allowances.
7.3.3 Individual required machining allowance
If a special required machining allowance is to apply to an individual surface, it shall be indicated
individually before the surface texture symbol according to ISO 1302 (see Figure 15).
Figure 15 — Individual required machining allowance
An individual required machining allowance overrules a general required machining allowance.
ISO/TS 8062-2:2013(E)
In sand casting, top surfaces sometimes need more machining allowance than other features. For these
surfaces, coarser required-machining-allowance grades can be selected and then indicated individually.
8 Indication of general tolerances
8.1 General tolerances according to ISO 8062-3
On drawings, the callout of general tolerances, e.g. according to ISO 8062-3, applies only to those part
conditions stated by the drawing type indicator.
On combined drawings where the drawing type indicator for final moulded is stated and the general
tolerance according to ISO 8062-3 is referenced, all non-individually indicated dimensions on the final
moulded-part condition are to be calculated according to the accumulation method, see Annex B.
General tolerances for moulded parts shall be indicated in or near the drawing title block, if applicable.
See Figures E.3, E.4, E.5.
8.2 General surface profile tolerance
See Figure 16.
Figure 16 — Example of the indication of general surface profile tolerance
The general surface profile tolerance applies to all surfaces which are not explicitly dimensioned with
linear and angular dimensions with plus/minus tolerance.
The geometry of all the surfaces to which the general surface profile tolerance applies shall be specified
with the theoretically exact dimension (TED) in its entirety, and shall be considered as a single pattern.
NOTE When using a general surface profile tolerance for the final moulded part, the reference to the general
tolerances according to ISO 8062-3 for the same part condition cannot be used because of a contradiction.
9 Types of specifications
9.1 General
The geometry of the part in its different conditions shall be specified completely. This can be done by
using the following specification methods.
9.2 Specification of final moulded-part condition
9.2.1 The final moulded-part condition can be specified directly on a single final moulded part drawing
according to ISO 10135. This method shall be used if the final moulded part is not to be machined.
If the final moulded part is to be machined, the specification of the final moulded part can be given on a
combined drawing
— indirectly, by using the accumulation method, or
— directly, by using the multiple tolerancing method.
12 © ISO 2013 – All rights reserved

ISO/TS 8062-2:2013(E)
9.2.2 When using the accumulation method, the final moulded part is specified indirectly on the
drawing in the following way:
— the machined moulded part is specified directly in total;
— appropriate dimensional tolerance grade (DCTG) according to ISO 8062-3 is specified;
— appropriate geometrical tolerance grade (GCTG) according to ISO 8062-3 is specified;
— appropriate required machining allowance grade (RMAG) according to ISO 8062-3 is specified;
— drawing type indicator for final moulded part is indicated;
— drawing type indicator for final machined moulded part is indicated.
As a result, the drawing is a combined drawing indirectly giving the specifications on the final moulded
part. In this case, unless otherwise specified, the linear dimensions, which are not individually indicated
on the final moulded part drawing, are to be calculated. The dimensional and the geometrical tolerances
which are not individually indicated on the final moulded part drawing are given by ISO 8062-3.
This specification method can lead to large excess material, but simplifies the specification of the final
moulded part.
9.2.3 When using the multiple tolerancing method, the final moulded part is specified directly on the
drawing in the following way:
— the most advanced machined moulded part, illustrated on the drawing, is specified in total;
— the final moulded part is specified directly in total;
— drawing type indicator for final moulded part is stated.
The specification of the final moulded part and the machined moulded parts should mainly be done
by using appropriate geometrical tolerances according to ISO 1101. For sizes (e.g. diameters, widths
of slots, tabs), wall thicknesses, fillets and chamfers, dimensional tolerancing (+/− tolerancing) may be
used instead.
9.2.4 The tolerances according to ISO 1101 may be specified as general tolerances (with or without
individual tolerances) or as individual tolerances only.
ISO 8062-3 may be used as a guidance to select appropriate individual tolerance values.
This specification method can lead to smaller excess material than the accumulation method, but needs
complete specification of the final moulded part directly on the drawing.
9.2.5 Surface profile (profile of any surface) tolerances may be used
— either for all surfaces, or
— for all surfaces except those belonging to features of size (diameters and widths), fillets and chamfers.
Features of size may be toleranced by dimensional tolerances together with positional tolerances
and, if appropriate, with maximum material requirement or least material requirement (see
ISO 2692). Fillets and chamfers may be toleranced with linear dimensions.
9.3 Specification of intermediate machined moulded-part conditions
The specification of the intermediate machined moulded part can be given on a single drawing of the
intermediate machined moulded part only or on a combined drawing which includes this intermediate
machined moulded part and the final moulded-part condition or other intermediate moulded parts or
the final machined moulded-part condition.
ISO/TS 8062-2:2013(E)
The intermediate machined moulded part is specified directly on the drawing in the following way:
— the most advanced intermediate machined moulded part, illustrated on the drawing, is specified in
total;
— drawing type indicator for intermediate machined moulded part is stated.
The intermediate machined surfaces with their theoretically exact dimensions and their surface profile
(profile of any surface) tolerances relative to the datum or datum system should be specified either
with a general surface profile tolerance or, if more appropriate, with individual tolerances. For sizes
(e.g. diameters, widths of slots, tabs), wall thicknesses, fillets and chamfers, dimensional tolerancing
(+/− tolerancing) may be used instead.
Surface profile (profile of any surface) tolerances may be used
— either for all surfaces, or
— for all surfaces except those belonging to features of size (diameters and widths). Features of size
may be toleranced by dimensional tolerances together with positional tolerances and, if appropriate,
with material modifiers requirement or least material requirement (see ISO 2692).
All moulded surfaces remaining as moulded shall be specified according to ISO 10135.
NOTE A former common practice indicated the nominal linear and angular dimensions together with a
minimum and maximum machining allowance on the intermediate machined moulded part for the final machining.
This created ambiguities in the interpretation of the permissible dimensional and geometrical deviations of the
intermediate machined moulded part. The method described in th
...