ISO/FDIS 3964-1
(Main)Dentistry — Coupling dimensions for handpiece connectors — Part 1: Mechanical properties
Dentistry — Coupling dimensions for handpiece connectors — Part 1: Mechanical properties
This International Standard specifies the coupling between handpieces and motors connected to dental units. This International Standard specifies the nominal dimensions, tolerances and the extraction force of coupling systems for use between handpiece and motor which supply the handpiece with water, air and light, and rotation energy.
Médecine bucco-dentaire — Dimensions d'accouplement pour pièces à main dentaires — Partie 1: Propriétés mécaniques
General Information
- Status
- Not Published
- Technical Committee
- ISO/TC 106/SC 4 - Dental instruments
- Drafting Committee
- ISO/TC 106/SC 4 - Dental instruments
- Current Stage
- 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
- Start Date
- 12-Feb-2026
- Completion Date
- 12-Feb-2026
Relations
- Effective Date
- 12-Feb-2026
- Effective Date
- 05-Aug-2023
- Effective Date
- 06-Jun-2022
- Revises
ISO 3964:2016/Amd 1:2018 - Dentistry — Coupling dimensions for handpiece connectors — Amendment 1 - Effective Date
- 06-Jun-2022
Overview
ISO/FDIS 3964-1:2026 sets the international requirements for coupling dimensions and mechanical properties of connectors used between dental handpieces and motors. Developed by ISO Technical Committee 106 (Dentistry), this standard ensures compatibility, safety, and performance in dental equipment by defining the nominal dimensions, tolerances, and extraction forces that enable the secure and reliable connection of handpieces, which are supplied with water, air, light, and rotational energy, to dental unit motors.
This standard is crucial for manufacturers and users of dental handpieces, dental motors, and related connectors, as it harmonizes component interfaces across the dental industry, improving both interoperability and maintenance.
Key Topics
Scope and Purpose
- Specifies the nominal dimensions, tolerances, and extraction force requirements for coupling systems connecting handpieces to motors in dental units.
- Applies to connectors that transmit water, air, light, and rotation energy.
- Focuses solely on mechanical connectors - not those with electronic terminals.
Types of Coupling Systems
- Classification is based on the supply features of water, air, and light:
- Type 1: No internal spray, no light supply
- Type 2: Internal spray, no light supply
- Type 3: Internal spray and light supply
- Type 4: No internal spray, with light supply
- Classification is based on the supply features of water, air, and light:
Dimensional and Mechanical Requirements
- Standardized dimensions and tolerances, including length and diameter values for both handpiece and motor sides.
- Requirements for extraction force to ensure connectors remain securely attached during dental procedures.
- Burr-free or rounded edges for safety and longevity.
- Tolerances align with ISO 2768-1 and ISO 22081.
- Permitted use of alternative designs for the coupling lock mechanism, provided they comply with the specified requirements.
Testing and Classification
- Procedures to verify physical dimensions and mechanical coupling force.
- Sampling and testing methods to validate compliance with the standard.
- Manufacturer instructions must clearly indicate coupling length type for user reference.
Applications
ISO/FDIS 3964-1:2026 is essential in the following contexts:
Dental Equipment Manufacturing
- Supports manufacturers in designing handpieces, motors, and connectors that are globally compatible and compliant.
- Facilitates easier product development, international trade, and regulatory acceptance.
Dental Clinic Operations
- Ensures seamless integration of equipment from multiple suppliers, reducing operational disruptions and maintenance challenges.
- Promotes safer, more efficient dental procedures by minimizing the risk of improper connections.
Servicing and Maintenance
- Simplifies inventory and servicing processes by standardizing spare parts and interfaces.
- Reduces training time for dental staff and technicians when handling equipment across brands.
Procurement and Regulatory Compliance
- Eases procurement processes for clinics and hospitals by enabling specification-based purchasing.
- Provides a recognized benchmark for regulatory approval and safety audits.
Related Standards
For optimal results and full compliance, ISO/FDIS 3964-1:2026 should be considered alongside these related standards:
- ISO 14457: Dentistry - Handpieces and motors - Specification for mechanical requirements.
- ISO 1942: Dentistry - Vocabulary for dental terminology.
- ISO 2768-1: General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications.
- ISO 22081: Geometrical product specifications (GPS) - Geometrical tolerancing - General geometrical and size specifications.
By adopting this standard, the dental industry benefits from increased equipment compatibility, improved safety, and streamlined global market access for dental handpieces and connectors.
ISO/FDIS 3964-1 - Dentistry — Coupling dimensions for handpiece connectors — Part 1: Mechanical properties Released:29. 01. 2026
REDLINE ISO/FDIS 3964-1 - Dentistry — Coupling dimensions for handpiece connectors — Part 1: Mechanical properties Released:29. 01. 2026
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Frequently Asked Questions
ISO/FDIS 3964-1 is a draft published by the International Organization for Standardization (ISO). Its full title is "Dentistry — Coupling dimensions for handpiece connectors — Part 1: Mechanical properties". This standard covers: This International Standard specifies the coupling between handpieces and motors connected to dental units. This International Standard specifies the nominal dimensions, tolerances and the extraction force of coupling systems for use between handpiece and motor which supply the handpiece with water, air and light, and rotation energy.
This International Standard specifies the coupling between handpieces and motors connected to dental units. This International Standard specifies the nominal dimensions, tolerances and the extraction force of coupling systems for use between handpiece and motor which supply the handpiece with water, air and light, and rotation energy.
ISO/FDIS 3964-1 is classified under the following ICS (International Classification for Standards) categories: 11.060.25 - Dental instruments. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO/FDIS 3964-1 has the following relationships with other standards: It is inter standard links to prEN ISO 3964-1, ISO 28921-1:2022, ISO 3964:2016, ISO 3964:2016/Amd 1:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO/FDIS 3964-1 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)
FINAL DRAFT
International
Standard
ISO/TC 106/SC 4
Dentistry — Coupling dimensions
Secretariat: DIN
for handpiece connectors —
Voting begins on:
2026-02-12
Part 1:
Mechanical properties
Voting terminates on:
2026-04-09
Médecine bucco-dentaire — Dimensions d'accouplement pour
pièces à main dentaires —
Partie 1: Propriétés mécaniques
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 106/SC 4
Dentistry — Coupling dimensions
Secretariat: DIN
for handpiece connectors —
Voting begins on:
Part 1:
Mechanical properties
Voting terminates on:
Médecine bucco-dentaire — Dimensions d'accouplement pour
pièces à main dentaires —
Partie 1: Propriétés mécaniques
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification according to the supply of water, air and light . 2
5 Requirements . 2
5.1 General .2
5.2 Dimensions .2
5.3 Coupling force . .16
6 Sampling . 16
7 Test methods .16
7.1 Dimensions .16
7.2 Coupling force .16
iii
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO 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, ISO 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
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 4, Dental
instruments, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 55, Dentistry, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This first edition cancels and replaces ISO 3964:2016, which has been technically revised. It also incorporates
the Amendment ISO 3964:2016/Amd 1:2018.
The main changes are as follows:
— the technical drawings have been improved;
— new dimensions and optional figures have been added.
A list of all parts in the ISO 3964 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
FINAL DRAFT International Standard ISO/FDIS 3964-1:2026(en)
Dentistry — Coupling dimensions for handpiece
connectors —
Part 1:
Mechanical properties
1 Scope
This document specifies coupling between handpieces and motors that are connected to dental units. For
the purposes of this document, the couplings described in this document are not equipped with electronic
terminal(s).
This document specifies the nominal dimensions, tolerances and extraction force of coupling systems for use
between handpieces and motor which supply the handpiece with water, air and light and rotation energy.
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 1942, Dentistry — Vocabulary
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 22081, Geometrical product specifications (GPS) — Geometrical tolerancing — General geometrical
specifications and general size specifications
ISO 14457, Dentistry — Handpieces and motors
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942, ISO 14457 and the following
apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
coupling dimension
description of the dimensions of connectors between air and electrical motors and straight and angled
handpieces, used to connect and supply the handpiece system
3.2
coupling system
combination of connector parts between air and electrical motors and straight and angled handpieces, used
to connect and supply the handpiece system
4 Classification according to the supply of water, air and light
For the purpose of this document, coupling systems are classified into the following types:
— Type 1: Coupling system for straight and angled handpieces and motors without internal spray supply
and without light supply;
— Type 2: Coupling system for straight and angled handpieces and motors with internal spray supply and
without light supply;
— Type 3: Coupling system for straight and angl
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ISO /TC 106/SC 04 4
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Secretariat: DIN
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Date:2025-12-08 2026-01-28
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Dentistry - — Coupling dimensions for handpiece connectors - —
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Mechanical properties Style Definition
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dentaires - —
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Partie 1 : Propriétés mécaniques
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St l D fi iti
Formatted: French (Switzerland)
Formatted: Default Paragraph Font, French
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
(Switzerland)
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
Formatted: French (Switzerland)
at the address below or ISO’s member body in the country of the requester.
Formatted: French (Switzerland)
ISO copyright office Formatted: Indent: Left: 0 cm, Right: 0 cm, Space
CP 401 • Ch. de Blandonnet 8 Before: 0 pt, No page break before, Adjust space
CH-1214 Vernier, Geneva between Latin and Asian text, Adjust space between
Phone: + 41 22 749 01 11
Asian text and numbers
EmailE-mail: copyright@iso.org
Formatted: French (Switzerland)
Website: www.iso.orgwww.iso.org
Formatted: French (Switzerland)
Published in Switzerland
Formatted: Italian (Italy)
ii
Contents Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers, Tab
stops: Not at 7.54 cm + 11.48 cm
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification according to the supply of water, air and light . 2
5 Requirements . 2
5.1 General. 2
5.2 Dimensions. 2
5.3 Coupling force . 19
6 Sampling . 19
7 Test methods . 19
7.1 Dimensions. 19
7.2 Coupling force . 19
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification. 2
4.1 According to the water, air and light supply . 2
5 Requirements . 2
5.1 General. 2
5.2 Dimensions. 2
5.3 Coupling force . 11
6 Sampling . 11
7 Test methods . 11
7.1 Dimensions. 11
7.2 Coupling force . 11
iii
Foreword Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Formatted: English (United Kingdom)
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO 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, ISO 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
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
Formatted: English (United Kingdom)
Formatted: Font: Not Italic
This document was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 4, Dental
instruments, in collaboration with the European Committee for Standardization (CEN) Technical Committee
Formatted: Font: Not Italic
CEN/TC 55, Dentistry, in accordance with the Agreement on technical cooperation between ISO and CEN
Formatted: Font: Not Italic
(Vienna Agreement).
Formatted: Default Paragraph Font
This first edition cancels and replaces ISO 3964:2016, which has been technically revised. It also incorporates
Formatted: Default Paragraph Font
the Amendment ISO 3964:2016/Amd 1:2018.
Formatted: Default Paragraph Font
The main changes are as follows: Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
— the technical drawings have been improved;
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers, Tab
new dimensions and optional figures have been added;
stops: Not at 0.7 cm + 1.4 cm + 2.1 cm + 2.8 cm +
3.5 cm + 4.2 cm + 4.9 cm + 5.6 cm + 6.3 cm + 7 cm
— — ISO 3964:206/Amd 1:2018 has been incorporated into this document.
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers, Tab
A list of all parts in the ISO 3964 series can be found on the ISO website.
stops: Not at 0.7 cm + 1.4 cm + 2.1 cm + 2.8 cm +
3.5 cm + 4.2 cm + 4.9 cm + 5.6 cm + 6.3 cm + 7 cm
Any feedback or questions on this document should be directed to the user’s national standards body. A
Formatted: Default Paragraph Font
complete listing of these bodies can be found at www.iso.org/members.html.
Formatted: Default Paragraph Font
Formatted: Default Paragraph Font
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
Formatted: English (United Kingdom)
Formatted: English (United Kingdom)
iv
Final DRAFT International Standard ISO/FDIS 3964-1:2025(en)
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single
Dentistry — Coupling dimensions for handpiece connectors — —
Formatted: Main Title 2, Adjust space between Latin
Part 1:
and Asian text, Adjust space between Asian text and
Mechanical properties
numbers
1 Scope
This document specifies coupling between handpieces and motors that are connected to dental units. For the
purposes of this document, the couplings described in this document are not equipped with electronic
terminal(s).
This document specifies the nominal dimensions, tolerances and extraction force of coupling systems for use
between handpieces and motor which supply the handpiece with water, air and light and rotation energy.
2 Normative references
Formatted: Default Paragraph Font
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,
Formatted: Default Paragraph Font
the latest edition of the referenced document (including any amendments) applies.
Formatted: Default Paragraph Font
ISO 1942, Dentistry — Vocabulary Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers, Tab
ISO 2768--1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual stops: Not at 0.7 cm + 1.4 cm + 2.1 cm + 2.8 cm +
tolerance indications 3.5 cm + 4.2 cm + 4.9 cm + 5.6 cm + 6.3 cm + 7 cm
Formatted: Default Paragraph Font
ISO 22081, Geometrical product specifications (GPS) — Geometrical tolerancing — General geometrical
Formatted: Default Paragraph Font
specifications and general size specifications
Formatted: Default Paragraph Font
ISO 14457, Dentistry — Handpieces and motors
Formatted: Default Paragraph Font
Formatted: Default Paragraph Font, Font: Italic
3 Terms and definitions
Formatted: Default Paragraph Font
For the purposes of this document, the terms and definitions given in ISO 1942, ISO 14457 and the following
Formatted: Default Paragraph Font
apply.
Formatted: Default Paragraph Font
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
Formatted: Adjust space between Latin and Asian text,
Adjust space between Asian text and numbers
— ISO Online browsing platform: available at https://www.iso.org/obp
Formatted: Default Paragraph Font
— IEC Electropedia: available at https://www.electropedia.org/ Formatted: Default Paragraph Font
Formatted: Default Paragraph Font
3.1
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coupling dimension
description of the dimensions of connectors between air- and electrical motors and straight and angled Formatted: English (United States)
handpieces, used to connect and supply the handpiece system
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numbers
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Not at 17.2 cm
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3.13.2
coupling system
Formatted: Adjust space between Latin and Asian text,
combination of connector parts between air and electrical motors and straight and angled handpieces, used
Adjust space between Asian text and numbers
to connect and supply the handpiece system
4 Classification according to the supply of water, air and light
Formatted: English (United States)
Formatted: English (United States)
For the purpose of this document, coupling systems are classified into the following types:
Formatted: Adjust space between Latin and Asian text,
— — Type 1: couplingCoupling system for straight and angled handpieces and motors without internal spray
Adjust space between Asian text and numbers
supply and without light supply;
Formatted: Adjust space between Latin and Asian text,
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— — Type 2: couplingCoupling system for straight and angled handpieces and motors with internal spray
stops: Not at 0.71 cm
supply and without light supply;
Formatted: Adjust space between Latin and Asian text,
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— — Type 3: couplingCoupling system for straight and angled handpieces and motors with internal spray
supply and with light supply;
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— — Type 4: couplingCoupling system for straight and angled handpieces and motors without internal spray
supply and with light supply. Formatted: Adjust space between Latin and Asian text,
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stops: Not at 0.71 cm
5 Requirements
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5.1 General
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Types of coupling for handpieces and motors are specific parts of dental handpieces. Requirements for dental
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handpieces are specified in ISO 14457.
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5.2 Dimensions
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The dimensions and the configuration of handpiece-sides and motor-sides shall be as specified in Figure 1, Formatted
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Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6,
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Figure 7 and Figure 8.Figure 8. The coupling dimensions X and X are specified in Table 1.Table 1.
1 2
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Table 1 — Coupling dimensions X and X
1 2
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Coupling Dimension Long Middle Short Extra short
Formatted
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Motor X1 max. 31,8 mm max. 24,8 mm max. 22,8 mm max. 18,8 mm
Formatted
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Handpiece X2 min. 32 mm min. 25 mm min. 23 mm min.19 mm
Formatted
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Dimensions without tolerances shall be in accordance with ISO 2768-1 (ISO 2768-f) and ISO 22081. Formatted
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Alternative designs of the coupling lock system are permitted.
Formatted
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The type of handpiece length shall be indicated in the manufacturer's instructions for use. Testing shall be
carried out in accordance with 7.1.7.1.
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2 © ISO 2025 2026 – All rights reserved
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stops: Not at 0.7 cm + 1.4 cm + 2.1 cm + 2.8 cm +
3.5 cm + 4.2 cm + 4.9 cm + 5.6 cm + 6.3 cm + 7 cm
Key
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1 grooves and geometry for sealing rings given by the manufacturer
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d ≤𝜙𝜙5,6 d ≥𝜙𝜙10,5 d not used d not used
2 12 22 32
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0 0
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d3 𝜙𝜙4,5 𝜙𝜙4, 5 d13 0,03 d23 not used d33 not used
−0,5 −0,5
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+0,2 .
d4 3, 5 d14 15~30 ° d24 not used d34 not used
−0,4
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d5 ≥ 7,2 d15 15~45 ° d25 not used d35 not used
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+0,95
+0,95
d ≥ 9,5 d d not used d not used
6 16 1,95 1, 95 26 36
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0 0
d7 ≥ 14,5 d17 1,25 25 d27 ≥ 12,1 d37 not used
−0,07 −0,07
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−0,08−0,08
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d8 1,6 ± 0,05 d18 d28 not used d38 not used
−0,25
−0,25
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+0,03 +0,03
d 𝜙𝜙3,02 02 d 120 ° ± 5 ° d not used
9 19 29
0 0
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+0,022 +0,022
d d Rz≤ 4,5 d not used
10 𝜙𝜙9,95 95 20 30
0 0
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4 © ISO 2025 2026 – All rights reserved
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F tt d
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Key
r can either be a radius or a cone shape with the point angle of ≤ 135 ° Formatted
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Edges shall be burr-free or round.
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Dimensions d to d are specified in Table 3.Table 3.
1 33
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Figure 2 — Type 1: Motor
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Table 3 – — Dimensions for Figure 2Figure 2
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Dimension Dimension Dimension Dimension
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No. No. No. No.
mm mm mm mm
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+1,2
0 0
𝜙𝜙9,86 86
d1 d11 1 d21 not used d31 not used
−0,01 −0,01 Formatted
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d2 ≥𝜙𝜙6 d12 5~45 ° d22 not used d32 not used Formatted
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+0,2
Formatted
d3 ≥𝜙𝜙5 d13 1, 3 d23 not used d33 not used .
−0,002 Formatted
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d 𝜙𝜙3 d ≤ 1,3 d not used
4 14 24
−0,012
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d 1,4 ± ±0,03 d ≤ 2,9 d not used
5 15 25
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d6 ≤𝜙𝜙4,95 d16 0, 8 d26 not used
−0,3
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d 3, 1 d not used d not used
7 17 27
−0,7
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d 6,75 ± 0,25 d not used d not used
8 18 28
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d9 8, 8 d19 not used d29 not used
−0,6
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d10 ≤ 14 d20 not used d30 not used Formatted
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F tt d
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