EN IEC 60072-2:2025

SLOVENSKI STANDARD
01-februar-2026
Dimenzije in izhodni nizi za električne rotacijske stroje - 2. del: Velikosti ohišij od
355 do 1000 in prirobnic od 1180 do 2360 (IEC 60072-2:2025)
Dimensions and output series for rotating electrical machines - Part 2: Frame numbers
355 to 1000 and flange numbers 1180 to 2360 (IEC 60072-2:2025)
Maße und Leistungsreihen für drehende elektrische Maschinen - Teil 2: Baugrößen 355
bis 1000 und Flanschgrößen 1180 bis 2360 (IEC 60072-2:2025)
Dimensions et séries de puissances des machines électriques tournantes - Partie 2:
Désignation des carcasses entre 355 et 1000 et des brides entre 1180 et 2360 (IEC
60072-2:2025)
Ta slovenski standard je istoveten z: EN IEC 60072-2:2025
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60072-2

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2025
ICS 29.160.01
English Version
Dimensions and output series for rotating electrical machines -
Part 2: Frame numbers 355 to 1 000 and flange numbers 1 180
to 2 360
(IEC 60072-2:2025)
Dimensions et séries de puissance des machines Maße und Leistungsreihen für drehende elektrische
électriques tournantes - Partie 2 : Désignation des Maschinen - Teil 2: Baugrößen 355 bis 1000 und
carcasses entre 355 et 1 000 et des brides entre 1 180 et 2 Flanschgrößen 1180 bis 2360
360 (IEC 60072-2:2025)
(IEC 60072-2:2025)
This European Standard was approved by CENELEC on 2025-10-10. CENELEC 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 CEN-CENELEC
Management Centre or to any CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60072-2:2025 E

European foreword
The text of document 2/2208/CDV, future edition 2 of IEC 60072-2, prepared by TC 2 "Rotating
machinery" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-10-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60072-2:2025 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60034-7 NOTE Approved as EN IEC 60034-7
IEC 60072-1 NOTE Approved as EN IEC 60072-1
ISO 128-3 NOTE Approved as EN ISO 128-3
ISO 273 NOTE Approved as EN 20273
ISO 286 series NOTE Approved as EN ISO 286 series
ISO 1101 NOTE Approved as EN ISO 1101
ISO 2768-1 NOTE Approved as EN 22768-1

IEC 60072-2 ®
Edition 2.0 2025-09
INTERNATIONAL
STANDARD
Dimensions and output series for rotating electrical machines -
Part 2: Frame numbers 355 to 1 000 and flange numbers 1 180 to 2 360
ICS 29.160.01  ISBN 978-2-8327-0653-4

IEC 60072-2:2025-09(en)
IEC 60072-2:2025 © IEC 2025
CONTENTS
FOREWORD. 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Symbols . 4
4.1 Letter symbols for dimensions . 4
4.2 Dimensional sketches. 6
5 Designations of machines . 7
5.1 Foot-mounted machines . 7
5.2 Flange-mounted machines . 7
5.3 Foot- and flange mounted machines . 7
5.4 Shaft extension . 7
6 Fixing dimensions . 7
6.1 Foot-mounted machines . 7
6.2 Flange-mounted machines . 10
7 Shaft end dimensions and tolerances . 10
8 Methods of measurement . 11
8.1 Shaft extensions run out . 11
8.2 Concentricity of spigot and shaft . 12
8.3 Perpendicularity of mounting face of flange to shaft . 12
9 Preferred rated output values . 13
Bibliography . 14

Figure 1 – Dimensional sketches . 6
Figure 2 – Illustration of the measurement of shaft extensions runout . 12
Figure 3 – Illustration of the measurement of concentricity . 12
Figure 4 – Illustration of the measurement of perpendicularity . 13

Table 1 – Dimensions H and A . 8
Table 2 – Dimension H and B . 9
Table 3 – Dimensions and tolerances for flanges with pitch circle diameters from
1 180 mm to 2 360 mm . 10
Table 4 – Dimensions and tolerances for shaft ends . 11

IEC 60072-2:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Dimensions and output series for rotating electrical machines -
Part 2: Frame numbers 355 to 1 000 and flange numbers 1 180 to 2 360

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60072-2 has been prepared by IEC technical committee TC 2: Rotating machinery. It is an
International Standard.
This second edition cancels and replaces the first edition published in 1990. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) complete revision on the basis of IEC 60072-1;
b) additional tolerances and measurements for shafts and flanges (DIN SPEC 42955).
IEC 60072-2:2025 © IEC 2025
The text of this International Standard is based on the following documents:
Draft Report on voting
2/2208/CDV 2/2240/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 60072 series, published under the general title Dimensions and
Output series for rotating electrical machines, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
IEC 60072-2:2025 © IEC 2025
1 Scope
This part of IEC 60072 covers the majority of rotating electrical machines for industrial purposes
within the dimension range and output powers:
– Foot-mounted: shaft heights: 355 mm to 1 000 mm.
– Flange-mounted: pitch circle diameter of flange: 1 180 mm to 2 360 mm.
It gives tables of fixing dimensions, shaft extension dimensions and their tolerances. However,
the variety of construction and the wide range of applications for the large machines with shaft
heights above 315 mm have led to the establishment of a relatively large number of values for
the dimension in order to cover all possible constructions. Owing to this, the present part covers
a wider range than IEC 60072-1 within which range values suitable for all designs or for a more
detailed standardization can be chosen.
NOTE The mounting dimensions given in this document for shaft heights 355 mm and 400 mm have been chosen
from values given in IEC 60072-1.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
4 Symbols
4.1 Letter symbols for dimensions
The dimensional sketches in 4.2 illustrate the symbols defined below. Mandatory dimensions
are marked with *.
*A distance between centre-lines of fixing holes (end view)
AA width of the end of the foot (end view)
AB over-all dimension across the feet (end view)
AC maximum diameter (envelope size) of the machine (e.g. fan cover; excluded are terminal box and
...