SIST EN IEC 60072-3:2026
(Main)Rotating electrical machines - Dimensions and output series - Part 3: Small built-in motors - Flange numbers BF10 to BF50 (IEC 60072-3:2026)
General Information
- Abstract
IEC 60072-3: 2026 applies to small built-in motors with a pitch circle diameter of the flange between 10 mm and 50 mm. It provides a table with fixing dimensions, shaft extension dimensions and their tolerances.
This second edition cancels and replaces the firstedition published in 1994. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) clarification of the scope.
- Status
- Published
- Publication Date
- 26-Aug-2026
- Technical Committee
- ERS - Rotating machinery
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 11-Nov-2025
- Due Date
- 16-Jan-2026
- Completion Date
- 27-Aug-2026
Overview
SIST EN IEC 60072-3:2026 specifies the dimensions and output series for small built-in rotating electrical machines, focusing on motors with flange pitch circle diameters from 10 mm to 50 mm (BF10 to BF50). Published by the CLC and aligned with international standard IEC 60072-3:2026, this standard provides key dimensional requirements for mounting and integrating small motors in various electrical and mechanical systems. This edition is a technical revision that supersedes the 1994 version, primarily clarifying the scope and ensuring consistency with modern equipment and mounting methods.
Standardizing flange sizes and shaft dimensions helps manufacturers, designers, and integrators ensure compatibility, interchangeability, and quality in the production and application of compact built-in motors across industrial sectors.
Key Topics
- Scope and Applicability: Covers small built-in motors with a flange pitch circle diameter between 10 mm and 50 mm. This applies to compact electrical machinery used where installation space is limited.
- Fixing Dimensions: Offers standardized tables with critical dimensions for flange mounting, contributing to compatibility between equipment from different manufacturers.
- Shaft Extension and Tolerance: Details the essential shaft extension dimensions, tolerances, and associated symbols (e.g., D, E, M, N, S, T), supporting consistent mechanical interface.
- Technical Revision: Updates and clarifies definitions, scope, and tabular guidance aligning with current engineering and manufacturing practices.
- Reference to Tolerance Standards: Integrates tolerance classes based on ISO 286-2, facilitating harmonized engineering tolerancing for both holes and shafts.
Applications
SIST EN IEC 60072-3:2026 is valuable wherever small built-in motors are employed and precise mechanical integration is necessary. Typical applications include:
- Industrial Automation: Standardized motor sizes simplify replacement and maintenance in robotics, conveyors, small drives, and other automated systems.
- Medical Devices: Ensures the correct fit and reliability of motors in imaging, diagnostic, and laboratory equipment where compactness and precision are critical.
- Consumer Electronics: Facilitates efficient integration of miniature motors in devices such as printers, scanners, and home automation products.
- Instrumentation and Measurement: Supports designers of test equipment or metering devices that require small, accurately mounted motors.
- OEM Equipment Manufacturing: Simplifies procurement, inventory, and product lifecycle management by allowing interchangeability between different suppliers.
By referencing the standardized dimensions and tolerances in EN IEC 60072-3, manufacturers and engineers can improve the reliability and flexibility of their designs, leading to reduced lead times and enhanced global compatibility.
Related Standards
- IEC 60072 Series: The parent series covering dimensions and output series for rotating electrical machines, including larger frame sizes and other mounting configurations.
- ISO 286-2: Geometrical product specifications - A key reference for tolerance classes and limit deviations for holes and shafts, ensuring precision engineering.
- EN 60034 Series: General standards for rotating electrical machines, addressing terminology, performance, and testing.
- IEC Electropedia and ISO Online Browsing Platform: Authoritative resources for internationally harmonized terminology related to electrical machines and engineering standards.
SIST EN IEC 60072-3:2026 is essential for professionals seeking standardized solutions in compact motor integration, supporting manufacturing efficiency, international trade, and technical excellence. For full specifications, consult the official standard and accompanying documentation.
Relations
- Effective Date
- 24-Mar-2026
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Frequently Asked Questions
SIST EN IEC 60072-3:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Rotating electrical machines - Dimensions and output series - Part 3: Small built-in motors - Flange numbers BF10 to BF50 (IEC 60072-3:2026)". This standard covers: IEC 60072-3: 2026 applies to small built-in motors with a pitch circle diameter of the flange between 10 mm and 50 mm. It provides a table with fixing dimensions, shaft extension dimensions and their tolerances. This second edition cancels and replaces the firstedition published in 1994. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) clarification of the scope.
IEC 60072-3: 2026 applies to small built-in motors with a pitch circle diameter of the flange between 10 mm and 50 mm. It provides a table with fixing dimensions, shaft extension dimensions and their tolerances. This second edition cancels and replaces the firstedition published in 1994. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) clarification of the scope.
SIST EN IEC 60072-3:2026 is classified under the following ICS (International Classification for Standards) categories: 29.160.01 - Rotating machinery in general; 29.160.30 - Motors. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN IEC 60072-3:2026 has the following relationships with other standards: It is inter standard links to SIST-TS CLC IEC/TS 60034-31:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN IEC 60072-3:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2026
Električni rotacijski stroji - Dimenzije in izhodne serije - 3. del: Majhni vgradni
motorji - Velikosti prirobnic od BF10 do BF50 (IEC 60072-3:2026)
Rotating electrical machines - Dimensions and output series - Part 3: Small built-in
motors - Flange numbers BF10 to BF50 (IEC 60072-3:2026)
Maße und Leistungsreihen für drehende elektrische Maschinen - Teil 3: Kleine
Einbaumotoren - Flanschgrößen BF10 bis BF50 (IEC 60072-3:2026)
Machines électriques tournantes - Dimensions et séries de puissances - Partie 3: Petits
moteurs incorporés - Désignation des brides BF10 à BF50 (IEC 60072-3:2026)
Ta slovenski standard je istoveten z: EN IEC 60072-3:2026
ICS:
29.160.30 Motorji Motors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60072-3
NORME EUROPÉENNE
EUROPÄISCHE NORM March 2026
ICS 29.160.01
English Version
Rotating electrical machines - Dimensions and output series -
Part 3: Small built-in motors - Flange numbers BF10 to BF50
(IEC 60072-3:2026)
Machines électriques tournantes - Dimensions et séries de Maße und Leistungsreihen für drehende elektrische
puissances - Partie 3: Petits moteurs incorporés - Maschinen - Teil 3: Kleine Einbaumotoren - Flanschgrößen
Désignation des brides BF10 à BF50 BF10 bis BF50
(IEC 60072-3:2026) (IEC 60072-3:2026)
This European Standard was approved by CENELEC on 2026-03-13. 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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60072-3:2026 E
European foreword
The text of document 2/2280/FDIS, future edition 2 of IEC 60072-3, 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) 2027-03-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-03-31
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 60072-3:2026 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
ISO 286-2 NOTE Approved as EN ISO 286-2
IEC 60072-3 ®
Edition 2.0 2026-02
INTERNATIONAL
STANDARD
Rotating electrical machines - Dimensions and output series -
Part 3: Small built-in motors - Flange numbers BF10 to BF50
ICS 29.160.01 ISBN 978-2-8327-1041-8
IEC 60072-3:2026-02(en)
IEC 60072-3:2026 © IEC 2026
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 . 4
5 Fixing dimensions and tolerances . 5
Bibliography . 6
Figure 1 – Dimensional sketches . 4
Table 1 – Dimensions and tolerances for flanges and shafts . 5
IEC 60072-3:2026 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Rotating electrical machines -
Dimensions and output series -
Part 3: Small built-in motors - Flange numbers BF10 to BF50
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,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
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 liaisi
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