NF EN ISO 286-1
Geometrical product specification (GPS) - ISO code system for tolerances of linear sizes - Part 1 : basis of tolerances, deviations and fits
ISO 286-1:2010 establishes the ISO code system for tolerances to be used for linear sizes of features of the following types: a) cylinder; b) two parallel opposite surfaces.ISO 286-1:2010 defines the basic concepts and the related terminology for this code system. It provides a standardized selection of tolerance classes for general purposes from amongst the numerous possibilities.Additionally, it defines the basic terminology for fits between two features of size without constraints of orientation and location and explains the principles of “basic hole” and “basic shaft”.
ISO 286-1:2010 establishes the ISO code system for tolerances to be used for linear sizes of features of the following types: a) cylinder; b) two parallel opposite surfaces.
ISO 286-1:2010 defines the basic concepts and the related terminology for this code system. It provides a standardized selection of tolerance classes for general purposes from amongst the numerous possibilities.
Additionally, it defines the basic terminology for fits between two features of size without constraints of orientation and location and explains the principles of “basic hole” and “basic shaft”.
This part gives the bases of the ISO system of limits and fits together with the calculated values of the standard tolerances and fundamental deviations. It also gives terms and definitions together with associated symbols.
- Avant-proposiv
- Introductionv
-
1 Domaine d'application1
-
2 Références normatives1
-
3 Termes et définitions2
-
3.1 Terminologie de base2
-
3.2 Terminologie associée aux tolérances et aux écarts3
-
3.3 Terminologie associée aux ajustements6
-
3.4 Terminologie associée au système d'ajustement ISO9
-
4 Système de codification ISO pour les tolérances sur les tailles linéaires11
-
4.1 Concepts de base et désignations11
-
4.2 Désignation de la classe de tolérance (règles d'écriture)13
-
4.3 Détermination des écarts limites (règles de lecture)14
-
4.4 Choix des classes de tolérance26
-
5 Système ISO d'ajustement26
-
5.1 Généralités26
-
5.2 Généralités sur les ajustements27
-
5.3 Détermination d'un ajustement27
- Annexe A (informative) Information supplémentaire sur le système ISO de limites et d'ajustement et ancienne pratique29
- Annexe B (informative) Exemples d'utilisation de l'ISO 286-1 pour déterminer les ajustements et classes de tolérance31
- Annexe C (informative) Relation avec la matrice GPS36
- Bibliographie38
The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.
The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.
With Requirements, quickly access the main part of the normative text!

- With a single click, add a new language, the Requirements or Redline+ service and add one or more additional users.
- Whether you are in the process of acquiring a standard or it is already available in your personal space, the UPSELL service is available at every stage to help you understand it and implement it within your organization.
COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.
Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!
Request your free, no-obligation live demo
I discover COBAZ