NBN EN ISO 2692:2021

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

ACTIVE

About this standard

Languages
English and French
Type
NBN
Standards committee
CEN/TC 290
Status
ACTIVE
Publication date
28 June 2021
Replaces
NBN EN ISO 2692:2015
ICS Code
01.100.20 (Mechanical engineering drawings)
Withdrawn Date

About this training

Summary

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.