SIST EN ISO 5458:2000
(Main)Geometrical product specifications (GPS) - Geometrical tolerancing - Positional tolerancing (ISO 5458:1998)
Geometrical product specifications (GPS) - Geometrical tolerancing - Positional tolerancing (ISO 5458:1998)
This International Standard describes the principle of positional tolerancing f for the location of regular and irregular features. However for clarity, only regular-shaped features such as holes, bolts, studs or pins, parallel-sided slots, keys and keyways have been shown. Positional tolerancing may also be applied to the location of a point, a straight line, or a plane surface. However, profile tolerancing must be used when lines are not intended to be straight or surfaces are not intended to lie in a plane, see ISO 1660.
Geometrische Produktspezifikation (GPS) - Form- und Lagetolerierung Positionstolerierung (ISO 5458:1998)
Diese Internationale Norm beschreibt die Positionstolerierung. Diese Tolerierungsmethode ist anwendbar für den Ort eines Punktes, eine nominell gerade Linie und eine nominell ebene Fläche, z.B. Kugelmittelpunkt, Achse einer Bohrung oder einer Welle und die Mittelfläche eines Schlitzes. Anmerkung: Wenn Linien nicht gerade sein sollen oder Flächen nicht in einer Ebene liegen sollen, ist die Profiltolerierung nach ISO 1660 anwendbar.
Spécification géométrique des produits (GPS) - Tolérance géométrique - Tolérance de localisation (ISO 5458:1998)
La présente Norme internationale décrit le tolérancement de localisation. Cette méthode de tolérancement s'applique à la position d'un point, d'une ligne nominalement droite ou d'une surface nominalement plane, par exemple le centre d'une sphère, l'axe d'un alésage ou d'un arbre, la surface médiane d'une rainure.
NOTE Le tolérancement de profil est utilisé dans le cas de lignes nominalement non rectilignes ou de surfaces nominalement non planes, voir l'ISO 1660.
Specifikacija geometrijskih veličin izdelka - Toleriranje geometrije - Toleriranje pozicij (ISO 5458:1998)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2000
6SHFLILNDFLMDJHRPHWULMVNLKYHOLþLQL]GHOND7ROHULUDQMHJHRPHWULMH7ROHULUDQMH
SR]LFLM ,62
Geometrical product specifications (GPS) - Geometrical tolerancing - Positional
tolerancing (ISO 5458:1998)
Geometrische Produktspezifikation (GPS) - Form- und Lagetolerierung
Positionstolerierung (ISO 5458:1998)
Spécification géométrique des produits (GPS) - Tolérance géométrique - Tolérance de
localisation (ISO 5458:1998)
Ta slovenski standard je istoveten z: EN ISO 5458:1998
ICS:
01.100.01 7HKQLþQRULVDQMHQDVSORãQR Technical drawings in
general
17.040.10 Tolerance in ujemi Limits and fits
17.040.40 6SHFLILNDFLMDJHRPHWULMVNLK Geometrical Product
YHOLþLQL]GHOND *36 Specification (GPS)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 5458
Second edition
1998-12-15
Geometrical Product Specifications
(GPS) — Geometrical tolerancing —
Positional tolerancing
Spécification géométrique des produits (GPS) — Tolérancement
géométrique — Tolérancement de localisation
A
Reference number
ISO 5458:1998(E)
ISO 5458:1998(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.
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.
International Standard ISO 5458 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 5458:1987), which has been technically revised.
Annexes A, B, C and D of this International Standard are for information only.
© ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
© ISO
ISO 5458:1998(E)
Introduction
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 chain links 1 and 2 of the chain of standards on location.
For more detailed information of the relation of this standard to the GPS matrix model, see annex C.
This International Standard is intended to promote the relationship between the designer and the manufacturer.
The concept of positional tolerancing, as described in ISO 1101, is further elaborated in this International Standard.
The figures in this International Standard serve to illustrate the subject matter only and are not necessarily
complete.
Other relevant International Standards, such as those dealing with the maximum material requirement (ISO 2692),
datums and datum systems (ISO 5459), should be taken into consideration when using this International Standard.
For the purposes of this International Standard, all dimensions and tolerances on the drawings have been shown in
vertical lettering. It should be understood that these indications could just as well be written in free-hand or inclined
(italic) lettering without altering the meaning of the indications.
For the presentation of lettering (proportions and dimensions), see ISO 3098-1.
iii
INTERNATIONAL STANDARD © ISO ISO 5458:1998(E)
Geometrical Product Specifications (GPS) — Geometrical
tolerancing — Positional tolerancing
1 Scope
This International Standard describes positional tolerancing. This tolerancing method is applied to the location of a
point, of a line nominally straight and of a surface nominally plane, e.g. the centre of a sphere, the axis of a hole or
shaft and the median surface of a slot.
NOTE Profile tolerancing is used when lines are not intended to be straight or surfaces are not intended to lie in a plane;
see ISO 1660.
2 Normative reference
The following standard contains provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the edition indicated was valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
1)
ISO 1101:— , Geometrical Product Specifications (GPS) — Geometrical tolerancing — Generalities, definitions,
symbols, indication on drawings.
3 Definitions
Definitions related to features are under development and will be issued as ISO 14660-1. This work will result in
new terms that are different from those used in this International Standard. These new terms are defined in annex A
and appear in the main body of this International Standard in parentheses next to the currently used term .
4 Establishment of positional tolerances
4.1 General
The primary constituents are theoretically exact dimensions, tolerance zones and datums.
4.2 Fundamental requirement
Positional tolerances are associated with theoretically exact dimensions and define the limits for the location of
actual (extracted) features, such as points, axes, median surfaces, nominally straight lines and nominally plane
surfaces relative to each other or in relation to one or more datums. The tolerance zone is symmetrically disposed
about the theoretically exact location.
1)
To be published. (Revision of ISO 1101:1983)
© ISO
ISO 5458:1998(E)
NOTE Positional tolerances do not accumulate when theoretically exact dimensions are arranged in a chain (see figure 4).
(This contrasts with dimensional tolerances that are arranged in a chain.) Positional tolerancing allows clear reference to be
made to one or more datums.
4.3 Theoretically exact dimensions
Theoretically exact dimensions, both angular and linear, are indicated by being enclosed in a rectangular frame in
accordance with ISO 1101. This is illustrated in figures 2 a), 2 b), 3 a), 4 a), 5 a) and 7 a).
The theoretically exact dimensions 0 and 90 , 180 or distance 0 between
° ° °
positionally toleranced features not related to a datum [see figure 4 a) and figure 5 a)],
positionally toleranced features related to the same datum(s) [see figure 2 a)],
positionally toleranced features and their related datums (see figure 1),
are implied without specific indication.
When the positional tolerance features share the same centreline or axis they are regarded as theoretically exactly
related features, unless otherwise specified, e.g. in relation to different datums or other reason indicated by an
appropriate note on the drawing as shown in figure 2 b).
Indication on the drawing Explanation
Cases a), b), c) or d) may apply at each individual hole:
a) axis of hole coincident with theoretically exact location
(zero deviation);
b) axis of hole at maximum position deviation with zero
perpendicularity deviation;
c) axis of hole at maximum position deviation with maximum
perpendicularity deviation;
d) axis of hole at maximum position deviation; in this case a
combination of geometrical deviations.
Figure 1
© ISO
ISO 5458:1998(E)
4.4 Positional tolerances on a complete circle
When positionally toleranced features are arranged in a complete circle it is understood that the features are equally
spaced, unless otherwise stated, and t
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