EN ISO 2692:2006
(Main)Geometrical product specifications (GPS) - Geometrical tolerancing - Maximum material requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR) (ISO 2692:2006)
Geometrical product specifications (GPS) - Geometrical tolerancing - Maximum material requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR) (ISO 2692:2006)
ISO 2692:2006 defines the maximum material requirement, the least material requirement and the reciprocity requirement, and specifies their applications.
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) and 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.
Geometrische Produktspezifikation (GPS) - Form- und Lagetolerierung - Maximum-Material-Bedingung (MMR), Minimum-Material-Bedingung (LMR) und Reziprozitätsbedingung (RPR) (ISO 2692:2006)
Diese Internationale Norm definiert die Maximum-Material-Bedingung, die Minimum-Material-Bedingung und die Reziprozitätsbedingung und legt ihre Anwendungen fest.
Diese Anforderungen dienen zur Steuerung bestimmter Funktionen von Werkstücken, bei denen eine Abhängigkeit von Maß und Geometrie vorhanden ist, z. B. zur Erfüllung der Funktionen zusammengebauter Teile (für die Maximum-Material-Bedingung) und zur Erfüllung der Funktion Mindest-Wandstärke (für Minimum-Material-Bedingung). Die Maximum-Material-Bedingung und die Minimum-Material-Bedingung werden jedoch auch zur Erfüllung anderer funktionaler Anforderungen genutzt.
Spécification géométrique des produits (GPS) - Tolérancement géométrique - Exigence du maximum de matière (MMR), exigence du minimum de matière (LMR) et exigence de réciprocité (RPR) (ISO 2692:2006)
L'ISO 2692:2006 définit l'exigence du maximum de matière, l'exigence du minimum de matière et l'exigence de réciprocité, et en précise les applications.
L'objectif de ces exigences est de contrôler les fonctions spécifiques de pièces où la taille et la géométrie sont interdépendantes, afin d'assurer, par exemple, l'assemblage des pièces (dans le cas de l'exigence du maximum de matière) et une épaisseur de paroi minimale (dans le cas de l'exigence du minimum de matière). Cependant, l'exigence du maximum de matière et l'exigence du minimum de matière peuvent être employées pour respecter d'autres exigences fonctionnelles de conception.
Specifikacija geometrijskih veličin izdelka – Toleriranje geometrijskih veličin – Zahteva po maksimalnem materialu, zahteva po minimalnem materialu in zahteva po materialni usklajenosti (ISO 2692:2006)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2007
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Geometrical product specifications (GPS) - Geometrical tolerancing - Maximum material
requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR)
(ISO 2692:2006)
Geometrische Produktspezifikation (GPS) - Form- und Lagetolerierung - Maximum-
Material-Bedingung (MMR), Minimum-Material-Bedingung (LMR) und
Reziprozitätsbedingung (RPR) (ISO 2692:2006)
Spécification géométrique des produits (GPS) - Tolérancement géométrique - Exigence
du maximum de matiere (MMR), exigence du minimum de matiere (LMR) et exigence de
réciprocité (RPR) (ISO 2692:2006)
Ta slovenski standard je istoveten z: EN ISO 2692:2006
ICS:
01.100.20 Konstrukcijske risbe Mechanical engineering
drawings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 2692
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2006
ICS 01.100.20
English Version
Geometrical product specifications (GPS) - Geometrical
tolerancing - Maximum material requirement (MMR), least
material requirement (LMR) and reciprocity requirement (RPR)
(ISO 2692:2006)
Spécification géométrique des produits (GPS) - Geometrische Produktspezifikation (GPS) - Form- und
Tolérancement géométrique - Exigence du maximum de Lagetolerierung - Maximum-Material-Bedingung (MMR),
matière (MMR), exigence du minimum de matière (LMR) et Minimum-Material-Bedingung (LMR) und
exigence de réciprocité (ISO 2692:2006) Reziprozitätsbedingung (RPR) (ISO 2692:2006)
This European Standard was approved by CEN on 25 November 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, 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.
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© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2692:2006: E
worldwide for CEN national Members.
Foreword
This document (EN ISO 2692:2006) 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 June 2007, and conflicting national
standards shall be withdrawn at the latest by June 2007.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
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.
Endorsement notice
The text of ISO 2692:2006 has been approved by CEN as EN ISO 2692:2006 without any
modifications.
INTERNATIONAL ISO
STANDARD 2692
Second edition
2006-12-15
Geometrical product specifications
(GPS) — Geometrical tolerancing —
Maximum material requirement (MMR),
least material requirement (LMR) and
reciprocity requirement (RPR)
Spécification géométrique des produits (GPS) — Tolérancement
géométrique — Exigence du maximum de matière (MMR), exigence du
minimum de matière (LMR) et exigence de réciprocité (RPR)
Reference number
ISO 2692:2006(E)
©
ISO 2006
ISO 2692:2006(E)
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ii © ISO 2006 – All rights reserved
ISO 2692:2006(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Maximum material requirement, MMR and least material requirement, LMR. 5
4.1 General. 5
4.2 Maximum material requirement, MMR. 5
4.3 Least material requirement, LMR. 7
5 Reciprocity requirement, RPR. 9
5.1 General. 9
5.2 Reciprocity requirement and maximum material requirement . 9
5.3 Reciprocity requirement and least material requirement. 9
Annex A (informative) Examples of tolerancing with Ⓜ, Ⓛ and Ⓡ. 10
Annex B (informative) Concept diagram. 29
Annex C (informative) Relation to the GPS matrix model. 30
Bibliography . 31
ISO 2692:2006(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 2692 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 2692:1988), which has been technically revised.
It also incorporates the Amendment ISO 2692:1988/Amd.1:1992.
iv © ISO 2006 – All rights reserved
ISO 2692:2006(E)
Introduction
0.1 General
This International Standard is a Geometrical product specification (GPS) standard and is to be regarded as a
general GPS standard (see ISO/TR 14638). It influences the chain links 1, 2 and 3 of the chain of standards
on size of linear “features of size” and form, orientation or location of derived features based on “features of
size”.
For more detailed information of the relation of this International Standard to the GPS matrix model, see
Annex C.
This International Standard covers some frequently occurring workpiece functional cases in design and
tolerancing. The “maximum material requirement”, MMR, covers “assembleability” and the “least material
requirement”, LMR, covers, for example, “minimum wall thickness” of a part. Each requirement (MMR and
LMR) combines two independent tolerance requirements into one collective requirement, which more
accurately simulates the intended function of the workpiece. In some cases of both MMR and LMR, the
“reciprocity requirement”, RPR, can be added.
0.2 Information about maximum material requirement, MMR
The assembly of parts depends on the combined effect of:
a) the size (of one or more extracted features of size), and
b) the geometrical deviation of the (extracted) features and their derived features, such as the pattern of bolt
holes in two flanges and the bolts securing them.
The minimum assembly clearance occurs when each of the mating features of size is at its maximum material
size (e.g. the largest bolt size and the smallest hole size) and when the geometrical deviations (e.g. the form,
orientation and location deviations) of the features of size and their derived features (median line or median
surface) are also at their maximum. Assembly clearance increases to a maximum when the sizes of the
assembled features of size are furthest from their maximum material sizes (e.g. the smallest shaft size and the
largest hole size) and when the geometrical deviations (e.g. the form, orientation and location deviations) of
the features of size and their derived features are zero. It therefore follows that if the sizes of one mating part
do not reach their maximum material size, the indicated geometrical tolerance of the features of size and their
derived features may be increased without endangering the assembly to the other part.
This assembly function is controlled by the maximum material requirement. The collective requirement is
indicated on drawings by the symbol Ⓜ.
0.3 Information about least material requirement, LMR
The least material requirement is designed to control, for example, the minimum wall thickness, thereby
preventing breakout (due to pressure in a tube), the maximum width of a series of slots, etc. It is indicated on
drawings by the symbol Ⓛ. The least material requirement is also characterised by a collective requirement
for the size of a feature of size, the geometrical deviation of the feature of size (form deviations) and the
location of its derived feature.
ISO 2692:2006(E)
0.4 Information about reciprocity requirement, RPR
The reciprocity requirement is an additional requirement, which may be used together with the maximum
material requirement and the least material requirement in cases where it is permitted — taking into account
the function of the toleranced feature(s) — to enlarge the size tolerance when the geometrical deviation on the
actual workpiece does not take full advantage of, respectively, the maximum material virtual condition or the
least material virtual condition.
The reciprocity requirement is indicated on the drawing by the symbol Ⓡ.
0.5 General information about terminology and figures
The terminology and tolerancing concepts in this International Standard have been updated to conform to
GPS terminology, notably that in ISO 286-1:1998, ISO 14405:—, ISO 14660-1:1999, ISO 14660-2:1999 and
ISO/TS 17450-1:2005.
vi © ISO 2006 – All rights reserved
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