FprEN ISO 2768

Geometrical product specifications (GPS) - Dimensional tolerancing - Tolerance limits for general specification of linear and angular sizes (ISO/FDIS 2768:2026)

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.

Allgemeintoleranzen

Spécification géométrique des produits (GPS) - Tolérancement dimensionnel - Limites de tolérance pour la spécification générale des tailles linéaires et angulaires (ISO/FDIS 2768:2026)

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.

Specifikacija geometrijskih veličin izdelka (GPS) - Tolerance dimenzij - Meje toleranc za splošno specifikacijo linearnih in kotnih velikosti (ISO/FDIS 2768:2026)

General Information

• Status: Not Published
• Publication Date: 31-Aug-2026
• ICS: 17.040.10 - Limits and fits
• ICS: 17.040.40 - Geometrical Product Specification (GPS)
• Technical Committee: CEN/SS I03 - Limits & Fits
• Drafting Committee: CEN/SS I03 - Limits & Fits
• Current Stage: 5020 - Submission to Vote - Formal Approval
• Start Date: 09-Apr-2026
• Completion Date: 09-Apr-2026
• Ref Project: kSIST FprEN ISO 2768:2026 - Geometrical product specifications (GPS) - Dimensional tolerancing -Tolerance limits for general specification of linear and angular sizes (ISO/FDIS 2768:2026)

Relations

• Consolidated By: ISO/FDIS 2768 - Geometrical product specifications (GPS) — Dimensional tolerancing — Tolerance limits for general specification of linear and angular sizes
• Effective Date: 12-Feb-2026
• Revises: EN 22768-1:1993 - General tolerances - Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1:1989)
• Effective Date: 19-Jan-2023

Overview

FprEN ISO 2768 sets out general dimensional tolerances for linear and angular sizes within the context of Geometrical Product Specifications (GPS). Developed by CEN and ISO/TC 213, it is designed to simplify drawing indications and enhance clarity in technical product documentation. The standard specifies tolerance limits across four classes (fine, medium, coarse, very coarse) and is particularly applicable to parts produced by metal removal or sheet metal forming processes.

This key standard aims to minimize ambiguity, streamline the specification of tolerances, and support widespread, consistent application in the mechanical and manufacturing industries. Its tables and annexes provide a practical framework for the general specification of dimensions, helping manufacturers, designers, and quality controllers maintain uniformity across a wide range of mechanical components.

Key Topics

• General Tolerance Classes: The standard defines four tolerance classes - fine (f), medium (m), coarse (c), and very coarse (v) - each intended for different levels of precision.
• Linear and Angular Sizes: FprEN ISO 2768 applies to nominal sizes above 0.5 mm for both linear and angular dimensions, making it relevant for the majority of mechanical parts and assemblies.
• Simplified Drawing Indications: By providing general tolerance values, the need to individually specify tolerances on every dimension in a drawing is reduced, promoting efficiency and reducing errors.
• Complementarity with ISO GPS Standards: The document references and is designed to work alongside other core standards such as ISO 8015 (GPS principles), ISO 14405 (dimensional tolerancing for linear and angular sizes), and ISO 22081 (general size specifications).
• Legacy and Industry Alignment: While based on principles from earlier standards (notably ISO 2768-1:1989), the revised approach reflects current best practices and removes ambiguities found in previous editions.

Applications

FprEN ISO 2768 is widely adopted in:

• Machined and Sheet Metal Parts: Applicable to a large array of mechanical parts manufactured through machining or metal forming.
• Design and Engineering Documentation: Beneficial for designers and drafters preparing technical documentation, as it reduces the need for repetitive or explicit tolerancing.
• Quality Assurance and Inspection: Standards-based tolerances provide clear criteria for acceptance and rejection during part inspection and verification, aligning with ISO GPS principles.
• Supplier Communication: Ensures consistent understanding of tolerance requirements across supply chains, aiding in global sourcing and manufacturing.

By establishing a uniform tolerancing framework, FprEN ISO 2768 supports product interchangeability, cost-effective manufacturing, and reduces the risk of disputes related to dimensional conformity.

Related Standards

For comprehensive application of geometrical product specifications and tolerancing, the following standards are closely related to FprEN ISO 2768:

• ISO 8015: Fundamentals, concepts, and rules for GPS
• ISO 14405-1 & ISO 14405-3: Dimensional tolerancing for linear and angular sizes
• ISO 22081: General geometrical and size specifications
• ISO 14638: GPS matrix model providing an overview of interconnected GPS standards
• ISO 13715: Technical product documentation for edges of undefined shape
• ISO 14253-1: Decision rules for verifying conformity to GPS specifications
• ISO 21204: Transition specification in GPS

These standards collectively ensure a robust framework for tolerancing and quality control in technical product documentation and manufacturing. Utilizing FprEN ISO 2768 alongside these documents maximizes repeatability, clarity, and interoperability in engineering projects.

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 2768:2025
01-december-2025
Specifikacija geometrijskih veličin izdelka (GPS) - Tolerance dimenzij - Meje
toleranc za splošno specifikacijo linearnih in kotnih velikosti (ISO/DIS 2768:2025)
Geometrical product specifications (GPS) - Dimensional tolerancing -Tolerance limits for
general specification of linear and angular sizes (ISO/DIS 2768:2025)
Allgemeintoleranzen
Spécification géométrique des produits (GPS) - Tolérancement dimensionnel - Limites
de tolérance pour la spécification générale des tailles linéaires et angulaires (ISO/DIS
2768:2025)
Ta slovenski standard je istoveten z: prEN ISO 2768
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 2768:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 2768:2025
oSIST prEN ISO 2768:2025
DRAFT
International
Standard
ISO/DIS 2768
ISO/TC 213
Geometrical product specifications
Secretariat: BSI
(GPS) — Dimensional tolerancing
Voting begins on:
— Tolerance limits for general
2025-08-25
specification of linear and angular
Voting terminates on:
sizes
2025-11-17
Spécification géométrique des produits (GPS) — Tolérancement
dimensionnel — Limites de tolérance pour la spécification
générale des tailles linéaires et angulaires
ICS: 17.040.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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.
Reference number
ISO/DIS 2768:2025(en)
oSIST prEN ISO 2768:2025
DRAFT
ISO/DIS 2768:2025(en)
International
Standard
ISO/DIS 2768
ISO/TC 213
Geometrical product specifications
Secretariat: BSI
(GPS) — Dimensional tolerancing
Voting begins on:
— Tolerance limits for general
specification of linear and angular
Voting terminates on:
sizes
Spécification géométrique des produits (GPS) — Tolérancement
dimensionnel — Limites de tolérance pour la spécification
générale des tailles linéaires et angulaires
ICS: 17.040.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 2768:2025(en)
ii
oSIST prEN ISO 2768:2025
ISO/DIS 2768:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 1
5 Tolerance limits . 2
5.1 Linear sizes .2
5.1.1 Tolerance limits selection for linear sizes.2
5.1.2 Tolerance limits for linear sizes .2
5.2 Angular sizes .3
5.2.1 Tolerance limits selection for angular sizes .3
5.2.2 Nominal integral line length for a cone or a frustum .3
5.2.3 Nominal integral line length for a wedge .3
5.2.4 Tolerance limits for angular sizes .5
Annex A (informative) Example of the use of this document in conjunction with ISO 22081. 6
Annex B (informative) Former practice . 7
Annex C (informative) Relation to the ISO GPS matrix model . 8
Bibliography . 9

iii
oSIST prEN ISO 2768:2025
ISO/DIS 2768:2025(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 2768-1:1989), which has been technically
revised.
The main changes are as follows:
— Editorial rework to make this document consistent with current ISO GPS standards
— Rules and text rework to make this document consistent with current ISO GPS standards
— Removal of Clause 6: Rejection rule from this document
— Restriction of the scope of this document to linear sizes and angular sizes to be consistent with
ISO 14405-1, ISO 14405-2 and ISO 14405-3
— Removal of tolerance limits for broken edges, radii and chamfers, from this document
— Extension of field of application to parts independent of material and manufacturing method
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
oSIST prEN ISO 2768:2025
ISO/DIS 2768:2025(en)
Introduction
This document is a geometrical product specification (ISO GPS) standard and is to be regarded as a
complementary ISO GPS standard (see ISO 14638). It influences chain link A of the chains of standards on size.
The ISO GPS matrix model given in ISO 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 the specifications made following this document, unless
otherwise indicated.
For more detailed information of the relation of this document to other standards and the ISO GPS matrix
model, see Annex C, Table C.1.
This document contains tables of tolerance limits for linear sizes and angular sizes.
ISO 2768:1973 was a general tolerance standard for parts produced by metal removal processes.
ISO 2768-1:1989 updated the tolerances and extended the tables covering a wider range of nominal sizes, and
introduced tolerance for chamfers and radii. It also changed the field of application by adding parts formed
from sheet metal. Significant changes have occurred in industry since the theses standards was released, for
example, machine performance, process capability, metrology or process planning. As the tolerance limits
contained in this document have not been updated, they are probably no longer representative of the current
state of the art in industry
However, it is observed that ISO 2768-1:1989 is still heavily used and that its usage is still widespread in
industry. ISO 2768-1:1989 is sometimes even used for parts made of non-metallic materials or manufactured
with process other than machining. However, those materials and manufacturing process were not part of
the assumptions made for the determination of the values contained herein.
This revised document intends
...