NF EN ISO 2692

NF EN ISO 2692

June 2021
Standard Current

Geometrical product specifications (GPS) - Geometrical tolerancing - Maximum material requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR)

This document defines the maximum material requirement (MMR), the least material requirement (LMR) and the reciprocity requirement (RPR). These requirements can only be applied to linear features of size of cylindrical type or two parallel opposite planes type. These requirements are often used to control specific functions of workpieces where size and geometry are interdependent, for example to fulfil the functions “assembly of parts” (for MMR) or “minimum wall thickness” (for LMR). However, the MMR and LMR can also be used to fulfil other functional design requirements.

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Main informations

Collections

National standards and national normative documents

Publication date

June 2021

Number of pages

64 p.

Reference

NF EN ISO 2692

ICS Codes

01.100.20   Mechanical engineering drawings
17.040.40   Geometrical Product Specification (GPS)

Classification index

E04-555

Print number

1

International kinship

ISO 2692:2021

European kinship

EN ISO 2692:2021
Sumary
Geometrical product specifications (GPS) - Geometrical tolerancing - Maximum material requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR)

This document defines the maximum material requirement (MMR), the least material requirement (LMR) and the reciprocity requirement (RPR). These requirements can only be applied to linear features of size of cylindrical type or two parallel opposite planes type.

These requirements are often used to control specific functions of workpieces where size and geometry are interdependent, for example to fulfil the functions “assembly of parts” (for MMR) or “minimum wall thickness” (for LMR). However, the MMR and LMR can also be used to fulfil other functional design requirements.

Replaced standards (1)
NF EN ISO 2692
March 2015
Standard Cancelled
Geometrical product specifications (GPS) - Geometrical tolerancing - Maximum material requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR)

<p>ISO 2692:2014 defines the maximum material requirement, the least material requirement and the reciprocity requirement. These requirements can only be applied to features of size.</p> <p>These requirements are used to control specific functions of workpieces where size and geometry are interdependent, e.g. to fulfil the functions "assembly of parts" (for maximum material requirement) or "minimum wall thickness" (for least material requirement). However, the maximum material requirement and least material requirement are also used to fulfil other functional design requirements.</p> <p>Considering this interdependence between size and geometry, the principle of independency defined in ISO 8015 does not apply when the maximum material requirement, least material requirement, or reciprocity requirement, are used.</p>

Table of contents
View the extract
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Exigence du maximum de matière (MMR) et exigence du minimum de matière (LMR)
  • 5 Exigence de réciprocité (RPR)
  • Annexe A (informative) Exemples de tolérancements avec ¿,¿ et
  • Annexe B (informative) Ancienne pratique
  • Annexe C (informative) Vue d'ensemble des concepts
  • Annexe D (informative) Utilisation de symboles pour les caractéristiques géométriques avec ¿ ou ¿
  • Annexe E (informative) Relation avec le modèle de matrice GPS
  • Bibliographie
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