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EN ISO 2692:2014
Geometrical product specifications (GPS) — Geometrical tolerancing — Maximum material requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR) (ISO 2692:2014)
прийнято як національний стандарт методом підтвердження за позначенням
ДСТУ EN ISO 2692:2018
(EN ISO 2692:2014, IDT; ISO 2692:2014, IDT)
Технічні вимоги до геометричних характеристик продукції (GPS). Визначення геометричних допусків. Вимоги щодо максимуму матеріалу (MMR), мінімуму матеріалу (LMR) та взаємодії (RPR)
English Version
Foreword
This document (EN ISO 2692:2014) 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text or by endorsement, at the latest by June 2015, and conflicting national standards shall be withdrawn at
the latest by June 2015.
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 ISO 2692:2006.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 2692:2014 has been approved by CEN as EN ISO 2692:2014 without any modification.
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Geometrical product specifications (GPS) — Geometrical tolerancing — Maximum material requirement (MMR),
least material requirement (LMR) and reciprocity requirement (RPR)
1 Scope
This International Standard defines the maximum material requirement, the least material requirement
and the reciprocity requirement. These requirements can only be applied to features of size.
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.
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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 1101:2012, Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form,
orientation, location and run-out
ISO 5459:2011, Geometrical product specifications (GPS) — Geometrical tolerancing — Datums and datum
systems
ISO 14405-1:2010, Geometrical product specifications (GPS) — Dimensional tolerancing — Part 1: Linear
sizes
ISO 14660-2:1999, Geometrical Product Specifications (GPS) — Geometrical features — Part 2: Extracted
median line of a cylinder and a cone, extracted median surface, local size of an extracted feature
ISO 17450-1:2011, Geometrical product specifications (GPS) — General concepts — Part 1: Model for
geometrical specification and verification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5459:2011, ISO 14405-1:2010,
ISO 14660-2:1999, ISO 17450-1:2011 and the following apply.
3.1
integral feature
geometrical feature belonging to the real surface of the workpiece or to a surface model
Note 1 to entry: An integral feature is intrinsically defined, e.g. skin of the workpiece.
Note 2 to entry: Adapted from ISO 17450-1:2011, definition 3.3.5.
3.2
feature of size
feature of linear size
geometrical feature, having one or more intrinsic characteristics, only one of which may be considered as
variable parameter, that additionally is a member of a “one parameter family”, and obeys the monotonic
containment property for that parameter
Note 1 to entry: Adapted from ISO 17450-1:2011, definition 3.3.1.5.1. See also ISO 22432:2011, definitions
3.2.5.1.1.1 and 3.2.5.1.1.2 for “one parameter family” and “monotonic containment property”.
EXAMPLE 1 A single cylindrical hole or shaft is a feature of linear size. Its linear size is its diameter.
EXAMPLE 2 Two opposite parallel plane surfaces are a feature of linear size. Its linear size is the distance
between the two parallel planes.
3.3
derived feature
geometrical feature, which does not exist physically on the real surface of the workpiece and which is not natively a nominal integral feature
Note 1 to entry: A derived feature can be established from a nominal feature, an associated feature, or an extracted feature. It is qualified respectively as a nominal derived feature, an associated derived feature, or an extracted
derived feature.
Note 2 to entry: The centre point, the median line and the median surface defined from one or more integral features are types of derived features
Note 3 to entry: Adapted from ISO 17450-1:2011, definition 3.3.6.
EXAMPLE 1 The median line of a cylinder is a derived feature obtained from the cylinder surface, which is an integral feature. The axis of the nominal cylinder is a nominal derived feature.
EXAMPLE 2 The median surface of two opposite parallel plane surfaces is a derived feature obtained from the two parallel plane surfaces, which constitute an integral feature. The median plane of the nominal two opposite parallel planes is a nominal derived feature.
3.4
maximum material condition
MMC
state of the considered extracted feature, where the feature of size is at that limit of size where the material of the feature is at its maximum everywhere, e.g. minimum hole diameter and maximum shaft diameter
Note 1 to entry: The term maximum material condition, MMC, is used in this International Standard to indicate, at ideal or nominal feature level (see ISO 17450-1), which limit of the requirement (upper or lower) is concerned.
Note 2 to entry: The size of the extracted feature at maximum material condition, MMC, can be defined by default, or by several special definitions of the size of the extracted feature (see ISO 14405-1).
Note 3 to entry: The maximum material condition, MMC, as defined in this International Standard, can be used unambiguously with any definition of size of the extracted feature.
3.5
maximum material size
MMS
lMMS
dimension defining the maximum material condition of a feature
Note 1 to entry: Maximum material size, MMS, can be defined by default or by one of several special definitions of the size of the extracted feature (see ISO 14405-1 and ISO 14660-2).
Note 2 to entry: In this International Standard, maximum material size, MMS is used as a numerical value, therefore no specific definition of the extracted size is needed to permit unambiguous use of maximum material size, MMS.
Note 3 to entry: See Annex A.
3.6
least material condition
LMC
state of the considered extracted feature, where the feature of size is at that limit of size where the material of the feature is at its minimum everywhere, e.g. maximum hole diameter and minimum shaft diameter
Note 1 to entry: The term least material condition, LMC, is used in this International Standard to indicate, at the ideal or nominal feature level (see ISO 17450-1), which limit of the requirement (upper or lower) is concerned.
Note 2 to entry: The size at least material condition, LMC, can be defined by default or by several special definitions of the size of extracted feature (see ISO 14405-1 and ISO 14660-2).
Note 3 to entry: The least material condition, LMC, as defined in this International Standard, can be used unambiguously with any definition of size of the extracted feature.
3.7
least material size
LMS
lLMS
dimension defining the least material condition of a feature
Note 1 to entry: Least material size, LMS, can be defined by default or by one of several special definitions of the size of the extracted feature (see ISO 14405-1 and ISO 14660-2).
Note 2 to entry: In this International Standard, least material size, LMS, is used as a numerical value, therefore no specific definition of the extracted size is needed to permit unambiguous use of least material size, LMS.
Note 3 to entry: See Annex A.
3.8
maximum material virtual size
MMVS
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