General tolerances

This part is intended to simplify drawing indications and specifies general tolerances in four tolerance classes. It applies to the dimensions of workpieces that are produced by metal removal or are formed from sheet metal. It contains three tables and an informative annex with regard to concepts behind general tolerancing of dimensions.

Tolérances générales

La présente partie de l'ISO 2768 vise à simplifier les dessins techniques et spécifie les tolérances générales pour les dimensions linéaires et angulaires sans indication de tolérances selon quatre classes de tolérance. NOTE 1 -- Le concept du tolérancement général pour les dimensions linéaires et angulaires est décrit dans l'annexe A. Elle concerne les dimensions des pièces exécutées par enlèvement de métal ou des pièces exécutées en tôle. NOTES 2 Ces tolérances peuvent être applicables également à des matériaux autres que le métal. 3 Des Normes internationales analogues existent, par exemple l'ISO 8062 pour les pièces moulées, ou pourront être établies par la suite. La présente partie de l'ISO 2768 est applicable exclusivement aux dimensions sans indication de tolérances individuelles suivantes : a) dimensions linéaires (par exemple dimensions extérieures, dimensions intérieures, dimensions de décrochements, diamètres, rayons, distances, rayons extérieurs et hauteurs de chanfrein pour arêtes abattues); b) dimensions angulaires, y compris les dimensions angulaires qui habituellement ne sont pas indiquées, par exemple angles droits (90 °), à moins qu'il soit fait référence à l'ISO 2768-2, ou angles de polygones réguliers; c) dimensions linéaires et angulaires obtenues par usinage de pièces assemblées. La présente partie de l'ISO 2768 ne s'applique pas aux dimensions suivantes : a) dimensions linéaires et angulaires dont les tolérances générales sont définies par référence à d'autres normes de tolérances générales; b) dimensions auxiliaires indiquées entre parenthèses; c) dimensions théoriquement exactes indiquées dans un cadre rectangulaire.

Splošne tolerance - 1. del: Tolerance dolžinskih in kotnih mer brez posebnih tolerančnih oznak

General Information

Status
Published
Publication Date
01-Nov-1989
Current Stage
6060 - International Standard published
Completion Date
02-Nov-1989

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INTERNATIONAL
ISO
STANDARD 27684
First edition
1989-11-15
General tolerantes -
Part 1:
Tolerantes for linear and angular dimensions without
individual tolerante indications
Tolhrances ghhales -
Partie I : Tolhrances pour dimensions fin4aires et angulaires non affectdes de
tolhrances individuelles
Reference number
ISO 2768-1 : 1989 (E)
---------------------- Page: 1 ----------------------
ISO 2768-1 : 1989 (EI
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of

national Standards bodies (ISO member bedies). The work of preparing International

Standards is normally carried out through ISO technical committees. Esch 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, govern-

mental 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.

Draft International Standards adopted by the technical committees are circulated to

the member bodies for approval before their acceptance as International Standards by

the ISO Council. They are approved in accordance with ISO procedures requiring at

least 75 % approval by the member bodies voting.
ISO 2768- prepared
International Standard 1 was Technical Committee ISO/TC 3,
Limits and fits.

This first edition of ISO 2768-1, together with ISO 2768-2 : 1989, cancel and replace

ISO 2768 : 1973.

ISO 2768 consists of the following Parts, under the general title General tolerantes:

- Part 7 : Tolerantes for linear and angular dimensions withou t individual
tolerante indica tions

- Part 2: Geome trical tolerantes for fea tures without individual tolerante indi-

ca tions
Annex A of this part of ISO 2768 is for information only.
0 ISO 1989

All rights reserved. No patt of this pubiication may be reproduced or utilized in any form or by any

means, electronie or mechanical, including photocopying and microfilm, without Permission in

writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
---------------------- Page: 2 ----------------------
ISO27684 :1989 (E)
Introduction
All features on component Parts always have a size and a geometrical shape. For

the deviation of size and for the deviations of the geometrical characteristics (form,

orientation and location) the function of the part requires Iimitations which, when

exceeded, impair this function.

The tolerancing on the drawing should be complete to ensure that the elements of size

and geometry of all features are controlled, i.e. nothing shall be implied or left to judge-

ment in the Workshop or in the inspection department.

The use of general tolera for size and geometry simplifies the task of ensuring that

this prerequisite is met.
---------------------- Page: 3 ----------------------
This page intentionally left blank
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO2768-1 : 1989 (EI
General tolerantes -
Part 1 I
Tolerantes for linear and angular dimensions without individual _
tolerante indications
1 Scope 2 General
This part of ISO 2768 is intended to simplify drawing indica-
When selecting the tolerante class, the respective customary
tions and it specifies general tolerantes for linear and angular
Workshop accuracy has to be taken into consideration. If smal-

dimensions without individual tolerante indications in four tol- ler tolerantes are required or larger tolerantes are permissible

erance classes.
and more economical for any individual feature, such toleran-
ces should be indicated adjacent to the relevant nominal dimen-
NOTE 1 - The concepts behind the general tolerancing of linear and sion(s).
angular dimensions are described in annex A.
General tolerantes for linear and angular dimensions apply’

lt applies to the dimensions of Parts that are produced by metal when drawings or associated specifications refer to this patt of

removal or Parts that are formed from sheet metal. ISO 2768 in accordance with clauses 4 and 5. If there are gen-

eral toierances for other processes, as specified in other lnter-
national Standards, reference shall be made to them on the
NOTES
drawings or associated specifications. For a dimension
2 These tolerantes may be suitable for use with materials other than
between an unfinished and a finished surface, e.g. of cast or
metal.
forged Patts, for which no individual tolerante is directly indi-
cated, the larger of the two general tolerantes in question
3 Parallel International Standards exist or are planned, e.g. see
applies, e.g. for castings, see ISO 80621).
ISO 80621) for castings.
This patt of ISO 2768 only applies for the following dimensions
3 Normative references
which do not have an individual tolerante indication :
The following Standards contain provisions which, through
a) linear dimensions (e-g. extemal sizes, internal sizes,
reference in this text, constitute provisions of this patt of
step sizes, diameters, radii, distances, extemal radii and
ISO 2768. At the time of publication, the editions indicated
chamfer heights for broken edges);
were valid. All Standards are subject to revision, and Parties to
agreements based on this patt of ISO 2768 are encouraged to
b) angular dimensions, including angular dimensions
investigate the possibility of applying the most recent editions
usually not indicated, e.g. right angles No), unless ref-
of the Standards indicated below. Members of IEC and ISO
erence to ISO 2768-2 is made, or angles of uniform poly-
maintain registers of currently valid International Standards.
gons;
ISO 2768-2 : 1909, General tolerantes - Part 2: Geometrical
c) linear and angular dimensions produced by machining
tolerantes for features without individual tolerante indications.
assembled Parts.
ISO 8015 : 1985, Technical drawings - Fundamental toleran-
It does not apply for the following dimensions :
cing principle.
a) linear and angular dimensions which are covered by
reference to other Standards on general tolerantes;
4 General tolerantes
b) auxiliary dimensions indicated in brackets;
4.1 Linear dimensions

c) theoretically exact dimensions indicated in rectangular General tolerantes for linear dimensions are given in tables 1

f rames. and 2.
System of dimensional tolerantes.
3) ISO 8062 : 1984, Castings -
---------------------- Page: 5 ----------------------
ISO 2768-1 : 1989 (EI
“ISO 2768”;
4.2 Angular dimensions a)
General tolerantes specified in angular units control only the
b) the tolerante class in accordance with this part of
general orientation of lines or line elements of surfaces, but not
ISO 2768.
their form deviations.
EXAMPLE
The general orientat
...

SLOVENSKI STANDARD
SIST ISO 2768-1:199
01-QRYHPEHU-199
6SORãQHWROHUDQFHGHO7ROHUDQFHGROåLQVNLKLQNRWQLKPHUEUH]SRVHEQLK
WROHUDQþQLKR]QDN

General tolerances -- Part 1: Tolerances for linear and angular dimensions without

individual tolerance indications

Tolérances générales -- Partie 1: Tolérances pour dimensions linéaires et angulaires non

affectées de tolérances individuelles
Ta slovenski standard je istoveten z: ISO 2768-1:1989
ICS:
17.040.10 Tolerance in ujemi Limits and fits
SIST ISO 2768-1:199 en

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

---------------------- Page: 1 ----------------------
SIST ISO 2768-1:1995
---------------------- Page: 2 ----------------------
SIST ISO 2768-1:1995
INTERNATIONAL
ISO
STANDARD 27684
First edition
1989-11-15
General tolerantes -
Part 1:
Tolerantes for linear and angular dimensions without
individual tolerante indications
Tolhrances ghhales -
Partie I : Tolhrances pour dimensions fin4aires et angulaires non affectdes de
tolhrances individuelles
Reference number
ISO 2768-1 : 1989 (E)
---------------------- Page: 3 ----------------------
SIST ISO 2768-1:1995
ISO 2768-1 : 1989 (EI
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of

national Standards bodies (ISO member bedies). The work of preparing International

Standards is normally carried out through ISO technical committees. Esch 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, govern-

mental 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.

Draft International Standards adopted by the technical committees are circulated to

the member bodies for approval before their acceptance as International Standards by

the ISO Council. They are approved in accordance with ISO procedures requiring at

least 75 % approval by the member bodies voting.
ISO 2768- prepared
International Standard 1 was Technical Committee ISO/TC 3,
Limits and fits.

This first edition of ISO 2768-1, together with ISO 2768-2 : 1989, cancel and replace

ISO 2768 : 1973.

ISO 2768 consists of the following Parts, under the general title General tolerantes:

- Part 7 : Tolerantes for linear and angular dimensions withou t individual
tolerante indica tions

- Part 2: Geome trical tolerantes for fea tures without individual tolerante indi-

ca tions
Annex A of this part of ISO 2768 is for information only.
0 ISO 1989

All rights reserved. No patt of this pubiication may be reproduced or utilized in any form or by any

means, electronie or mechanical, including photocopying and microfilm, without Permission in

writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
---------------------- Page: 4 ----------------------
SIST ISO 2768-1:1995
ISO27684 :1989 (E)
Introduction
All features on component Parts always have a size and a geometrical shape. For

the deviation of size and for the deviations of the geometrical characteristics (form,

orientation and location) the function of the part requires Iimitations which, when

exceeded, impair this function.

The tolerancing on the drawing should be complete to ensure that the elements of size

and geometry of all features are controlled, i.e. nothing shall be implied or left to judge-

ment in the Workshop or in the inspection department.

The use of general tolera for size and geometry simplifies the task of ensuring that

this prerequisite is met.
---------------------- Page: 5 ----------------------
SIST ISO 2768-1:1995
This page intentionally left blank
---------------------- Page: 6 ----------------------
SIST ISO 2768-1:1995
INTERNATIONAL STANDARD ISO2768-1 : 1989 (EI
General tolerantes -
Part 1 I
Tolerantes for linear and angular dimensions without individual _
tolerante indications
1 Scope 2 General
This part of ISO 2768 is intended to simplify drawing indica-
When selecting the tolerante class, the respective customary
tions and it specifies general tolerantes for linear and angular
Workshop accuracy has to be taken into consideration. If smal-

dimensions without individual tolerante indications in four tol- ler tolerantes are required or larger tolerantes are permissible

erance classes.
and more economical for any individual feature, such toleran-
ces should be indicated adjacent to the relevant nominal dimen-
NOTE 1 - The concepts behind the general tolerancing of linear and sion(s).
angular dimensions are described in annex A.
General tolerantes for linear and angular dimensions apply’

lt applies to the dimensions of Parts that are produced by metal when drawings or associated specifications refer to this patt of

removal or Parts that are formed from sheet metal. ISO 2768 in accordance with clauses 4 and 5. If there are gen-

eral toierances for other processes, as specified in other lnter-
national Standards, reference shall be made to them on the
NOTES
drawings or associated specifications. For a dimension
2 These tolerantes may be suitable for use with materials other than
between an unfinished and a finished surface, e.g. of cast or
metal.
forged Patts, for which no individual tolerante is directly indi-
cated, the larger of the two general tolerantes in question
3 Parallel International Standards exist or are planned, e.g. see
applies, e.g. for castings, see ISO 80621).
ISO 80621) for castings.
This patt of ISO 2768 only applies for the following dimensions
3 Normative references
which do not have an individual tolerante indication :
The following Standards contain provisions which, through
a) linear dimensions (e-g. extemal sizes, internal sizes,
reference in this text, constitute provisions of this patt of
step sizes, diameters, radii, distances, extemal radii and
ISO 2768. At the time of publication, the editions indicated
chamfer heights for broken edges);
were valid. All Standards are subject to revision, and Parties to
agreements based on this patt of ISO 2768 are encouraged to
b) angular dimensions, including angular dimensions
investigate the possibility of applying the most recent editions
usually not indicated, e.g. right angles No), unless ref-
of the Standards indicated below. Members of IEC and ISO
erence to ISO 2768-2 is made, or angles of uniform poly-
maintain registers of currently valid International Standards.
gons;
ISO 2768-2 : 1909, General tolerantes - Part 2: Geometrical
c) linear and angular dimensions produced by machining
tolerantes for features without individual tolerante indications.
assembled Parts.
ISO 8015 : 1985, Technical drawings - Fundamental toleran-
It does not apply for the following dimensions :
cing principle.
a) linear and angular dimensions which are covered by
reference to other Standards on general tolerantes;
4 General tolerantes
b) auxiliary dimensions indicated in brackets;
4.1 Linear dimensions
c) theoretically exact dimensions indicated in rectangu
...

SLOVENSKI STANDARD
SIST ISO 2768-1:1999
01-marec-1999
6SORãQHWROHUDQFHGHO7ROHUDQFHGROåLQVNLKLQNRWQLKPHUEUH]SRVHEQLK
WROHUDQþQLKR]QDN

General tolerances -- Part 1: Tolerances for linear and angular dimensions without

individual tolerance indications

Tolérances générales -- Partie 1: Tolérances pour dimensions linéaires et angulaires non

affectées de tolérances individuelles
Ta slovenski standard je istoveten z: ISO 2768-1:1989
ICS:
17.040.10 Tolerance in ujemi Limits and fits
SIST ISO 2768-1:1999 en

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

---------------------- Page: 1 ----------------------
INTERNATIONAL
ISO
STANDARD 27684
First edition
1989-11-15
General tolerantes -
Part 1:
Tolerantes for linear and angular dimensions without
individual tolerante indications
Tolhrances ghhales -
Partie I : Tolhrances pour dimensions fin4aires et angulaires non affectdes de
tolhrances individuelles
Reference number
ISO 2768-1 : 1989 (E)
---------------------- Page: 2 ----------------------
ISO 2768-1 : 1989 (EI
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of

national Standards bodies (ISO member bedies). The work of preparing International

Standards is normally carried out through ISO technical committees. Esch 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, govern-

mental 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.

Draft International Standards adopted by the technical committees are circulated to

the member bodies for approval before their acceptance as International Standards by

the ISO Council. They are approved in accordance with ISO procedures requiring at

least 75 % approval by the member bodies voting.
ISO 2768- prepared
International Standard 1 was Technical Committee ISO/TC 3,
Limits and fits.

This first edition of ISO 2768-1, together with ISO 2768-2 : 1989, cancel and replace

ISO 2768 : 1973.

ISO 2768 consists of the following Parts, under the general title General tolerantes:

- Part 7 : Tolerantes for linear and angular dimensions withou t individual
tolerante indica tions

- Part 2: Geome trical tolerantes for fea tures without individual tolerante indi-

ca tions
Annex A of this part of ISO 2768 is for information only.
0 ISO 1989

All rights reserved. No patt of this pubiication may be reproduced or utilized in any form or by any

means, electronie or mechanical, including photocopying and microfilm, without Permission in

writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
---------------------- Page: 3 ----------------------
ISO27684 :1989 (E)
Introduction
All features on component Parts always have a size and a geometrical shape. For

the deviation of size and for the deviations of the geometrical characteristics (form,

orientation and location) the function of the part requires Iimitations which, when

exceeded, impair this function.

The tolerancing on the drawing should be complete to ensure that the elements of size

and geometry of all features are controlled, i.e. nothing shall be implied or left to judge-

ment in the Workshop or in the inspection department.

The use of general tolera for size and geometry simplifies the task of ensuring that

this prerequisite is met.
---------------------- Page: 4 ----------------------
This page intentionally left blank
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO2768-1 : 1989 (EI
General tolerantes -
Part 1 I
Tolerantes for linear and angular dimensions without individual _
tolerante indications
1 Scope 2 General
This part of ISO 2768 is intended to simplify drawing indica-
When selecting the tolerante class, the respective customary
tions and it specifies general tolerantes for linear and angular
Workshop accuracy has to be taken into consideration. If smal-

dimensions without individual tolerante indications in four tol- ler tolerantes are required or larger tolerantes are permissible

erance classes.
and more economical for any individual feature, such toleran-
ces should be indicated adjacent to the relevant nominal dimen-
NOTE 1 - The concepts behind the general tolerancing of linear and sion(s).
angular dimensions are described in annex A.
General tolerantes for linear and angular dimensions apply’

lt applies to the dimensions of Parts that are produced by metal when drawings or associated specifications refer to this patt of

removal or Parts that are formed from sheet metal. ISO 2768 in accordance with clauses 4 and 5. If there are gen-

eral toierances for other processes, as specified in other lnter-
national Standards, reference shall be made to them on the
NOTES
drawings or associated specifications. For a dimension
2 These tolerantes may be suitable for use with materials other than
between an unfinished and a finished surface, e.g. of cast or
metal.
forged Patts, for which no individual tolerante is directly indi-
cated, the larger of the two general tolerantes in question
3 Parallel International Standards exist or are planned, e.g. see
applies, e.g. for castings, see ISO 80621).
ISO 80621) for castings.
This patt of ISO 2768 only applies for the following dimensions
3 Normative references
which do not have an individual tolerante indication :
The following Standards contain provisions which, through
a) linear dimensions (e-g. extemal sizes, internal sizes,
reference in this text, constitute provisions of this patt of
step sizes, diameters, radii, distances, extemal radii and
ISO 2768. At the time of publication, the editions indicated
chamfer heights for broken edges);
were valid. All Standards are subject to revision, and Parties to
agreements based on this patt of ISO 2768 are encouraged to
b) angular dimensions, including angular dimensions
investigate the possibility of applying the most recent editions
usually not indicated, e.g. right angles No), unless ref-
of the Standards indicated below. Members of IEC and ISO
erence to ISO 2768-2 is made, or angles of uniform poly-
maintain registers of currently valid International Standards.
gons;
ISO 2768-2 : 1909, General tolerantes - Part 2: Geometrical
c) linear and angular dimensions produced by machining
tolerantes for features without individual tolerante indications.
assembled Parts.
ISO 8015 : 1985, Technical drawings - Fundamental toleran-
It does not apply for the following dimensions :
cing principle.
a) linear and angular dimensions which are covered by
reference to other Standards on general tolerantes;
4 General tolerantes
b) auxiliary dimensions indicated in brackets;
4.1 Linear dimensions

c) theoretically exact dimensions indicated in rectangular General tolerantes for linear dimensions are given in tables 1

f ram
...

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