EN ISO 286-2:2010

SLOVENSKI STANDARD
01-september-2010
1DGRPHãþD
SIST EN 20286-2:2000
SIST EN 20286-2:2000/prA1:2008
SIST ISO 286-2:1999
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Geometrical product specifications (GPS) - ISO code system for tolerances on linear
sizes - Part 2: Tables of standard tolerance classes and limit deviations for holes and
shafts (ISO 286-2:2010)
Geometrische Produktspezifikation (GPS) - ISO-Toleranzsystem für Längenmaße - Teil
2: Tabellen der Grundtoleranzgrade und Grenzabmaße für Bohrungen und Wellen (ISO
286-2:2010)
Spécification géométrique des produits (GPS) - Système de codification ISO pour les
tolérances sur les tailles linéaires - Partie 2: Tableaux des classes de tolérance
normalisées et des écarts limites des alésages et des arbres (ISO 286-2:2010)
Ta slovenski standard je istoveten z: EN ISO 286-2:2010
ICS:
17.040.10 Tolerance in ujemi Limits and fits
17.040.40 6SHFLILNDFLMDJHRPHWULMVNLK Geometrical Product
YHOLþLQL]GHOND*36 Specification (GPS)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 286-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2010
ICS 17.040.10 Supersedes EN 20286-2:1993
English Version
Geometrical product specifications (GPS) - ISO code system for
tolerances on linear sizes - Part 2: Tables of standard tolerance
classes and limit deviations for holes and shafts (ISO 286-
2:2010)
Spécification géométrique des produits (GPS) - Système Geometrische Produktspezifikation (GPS) - ISO-
de codification ISO pour les tolérances sur les tailles Toleranzsystem für Längenmaße - Teil 2: Tabellen der
linéaires - Partie 2: Tableaux des classes de tolérance Grundtoleranzgrade und Grenzabmaße für Bohrungen und
normalisées et des écarts limites des alésages et des Wellen (ISO 286-2:2010)
arbres (ISO 286-2:2010)
This European Standard was approved by CEN on 15 May 2010.

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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 286-2:2010: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 286-2:2010) has been prepared by Technical Committee ISO/TC 213 "Dimensional
and geometrical product specifications and verification" in collaboration with Technical Committee
CEN/TC 290 “Dimensional and geometrical product specification and verification” the secretariat of which is
held by AFNOR.
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 December 2010, and conflicting national standards shall be withdrawn
at the latest by December 2010.
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.
This document supersedes EN 20286-2:1993.
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 286-2:2010 has been approved by CEN as a EN ISO 286-2:2010 without any modification.

INTERNATIONAL ISO
STANDARD 286-2
Second edition
2010-06-15
Geometrical product specifications
(GPS) — ISO code system for tolerances
on linear sizes —
Part 2:
Tables of standard tolerance classes and
limit deviations for holes and shafts
Spécification géométrique des produits (GPS) — Système de
codification ISO pour les tolérances sur les tailles linéaires —
Partie 2: Tableaux des classes de tolérance normalisées et des écarts
limites des alésages et des arbres

Reference number
ISO 286-2:2010(E)
©
ISO 2010
ISO 286-2:2010(E)
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ii © ISO 2010 – All rights reserved

ISO 286-2:2010(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.3
3 Standard tolerances.3
4 Limit deviations for holes.4
5 Limit deviations for shafts.4
6 Presentation of Tables 2 to 32 .4
Annex A (informative) Graphical review of tolerance intervals for holes and shafts .45
Annex B (informative) Relationship to the GPS matrix model .50
Bibliography.52

ISO 286-2:2010(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 286-2 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 286-2:1988), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 286-2:1988/Cor.1:2006.
ISO 286 consists of the following parts, under the general title Geometrical product specifications (GPS) —
ISO code system for tolerances on linear sizes:
⎯ Part 1: Basis of tolerances, deviations and fits
⎯ Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts

iv © ISO 2010 – All rights reserved

ISO 286-2:2010(E)
Introduction
This part of ISO 286 is a geometrical product specification (GPS) standard and is to be regarded as a general
GPS standard (see ISO/TR 14638). It influences chain links 1 and 2 of the chain of standards on size in the
general GPS matrix.
For more detailed information on the relationship of this part of ISO 286 to the GPS matrix model, see
Annex B.
The need for limits and fits for machined workpieces was brought about mainly by the requirement for
interchangeability between mass-produced parts and the inherent inaccuracy of manufacturing methods,
coupled with the fact that “exactness” of size was found to be unnecessary for most workpiece features. In
order that the fit function could be satisfied, it was found sufficient to manufacture a given workpiece so that its
size lay within two permissible limits, i.e. a tolerance, this being the variation in size acceptable in manufacture
while ensuring the functional fit requirements of the product.
Similarly, where a specific fit condition is required between mating features of two different workpieces, it is
necessary to ascribe an allowance, either positive or negative, to the nominal size to achieve the required
clearance or interference. ISO 286 gives the internationally accepted code system for tolerances on linear
sizes. It provides a system of tolerances and deviations suitable for two types of feature: “cylinder” and “two
parallel opposite surfaces”. The main intention of this code system is the fulfilment of the function fit.
The terms “hole”, “shaft” and “diameter” are used to designate the types of feature of cylinders (e.g. for the
tolerancing of the diameter of a hole or shaft). For simplicity, they are also used for two parallel opposite
surfaces (e.g. for the tolerancing of the thickness of a key or the width of a slot).
The pre-condition for the application of the ISO code system for tolerances on linear sizes for the features
forming a fit is that the nominal sizes of the hole and the shaft are identical.
The previous edition of ISO 286-2 (published in 1988) had the envelope criterion as the default association
criterion for the size of a feature; however, ISO 14405-1 changes this default association criterion to the two-
point size criterion. This means that form is no longer controlled by the default specification of size.
In many cases, the diameter tolerances specified in this part of ISO 286 are not sufficient for effective control
of the intended function of the fit. The envelope criterion specified in ISO 14405-1 may be required. In
addition, the use of geometrical form tolerances and surface texture requirements may improve the control of
the intended function.
A general graphical representation of the relationship between the respective tolerance classes and their
deviations is given in Annex A.
INTERNATIONAL STANDARD ISO 286-2:2010(E)

Geometrical product specifications (GPS) — ISO code system
for tolerances on linear sizes —
Part 2:
Tables of standard tolerance classes and limit deviations for
holes a
...