oSIST prEN ISO 3964-1:2025
(Main)Dentistry - Coupling dimensions for handpiece connectors - Part 1: Mechanical properties (ISO/DIS 3964-1:2025)
Dentistry - Coupling dimensions for handpiece connectors - Part 1: Mechanical properties (ISO/DIS 3964-1:2025)
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.
Zahnheilkunde - Kupplungsmaße für Handstückverbindungen - Teil 1: Mechanische Eigenschaften (ISO/DIS 3964-1:2025)
Médecine bucco-dentaire - Dimensions d'accouplement pour pièces à main dentaires - Partie 1: Propriétés mécaniques (ISO/DIS 3964-1:2025)
Zobozdravstvo - Priključne mere za priključke za vrteče se zobne pripomočke - 1. del: Mehanske lastnosti (ISO/DIS 3964-1:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2025
Zobozdravstvo - Priključne mere za priključke za vrteče se zobne pripomočke - 1.
del: Mehanske lastnosti (ISO/DIS 3964-1:2025)
Dentistry - Coupling dimensions for handpiece connectors - Part 1: Mechanical
properties (ISO/DIS 3964-1:2025)
Zahnheilkunde - Kupplungsmaße für Handstückverbindungen - Teil 1: Mechanische
Eigenschaften (ISO/DIS 3964-1:2025)
Médecine bucco-dentaire - Dimensions d'accouplement pour pièces à main dentaires -
Partie 1: Propriétés mécaniques (ISO/DIS 3964-1:2025)
Ta slovenski standard je istoveten z: prEN ISO 3964-1
ICS:
11.060.20 Zobotehnična oprema Dental equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 3964-1
ISO/TC 106/SC 4
Dentistry — Coupling dimensions
Secretariat: DIN
for handpiece connectors —
Voting begins on:
Part 1: 2025-04-21
Mechanical properties
Voting terminates on:
2025-07-14
ICS: 11.060.25
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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Reference number
ISO/DIS 3964-1:2025(en)
DRAFT
ISO/DIS 3964-1:2025(en)
International
Standard
ISO/DIS 3964-1
ISO/TC 106/SC 4
Dentistry — Coupling dimensions
Secretariat: DIN
for handpiece connectors —
Voting begins on:
Part 1:
Mechanical properties
Voting terminates on:
ICS: 11.060.25
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
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TO SUBMIT, WITH THEIR COMMENTS,
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NOTIFICATION OF ANY RELEVANT PATENT
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PROVIDE SUPPORTING DOCUMENTATION.
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 3964-1:2025(en)
ii
ISO/DIS 3964-1:2025(en)
Contents Page
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 . .14
6 Sampling . 14
7 Test methods . 14
7.1 Dimensions .14
7.2 Coupling force .14
iii
ISO/DIS 3964-1:2025(en)
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
patent declarations received (see www.iso.org/patents).
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.
This first edition cancels and replaces the part of the edition (ISO 3964:2016 + Amd 1:2018), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— improved technical drawings for better visualization
— addition of new dimensions and optional figures
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
ISO/DIS 3964-1:2025(en)
Introduction
ISO 3964 was divided to two documents to consider another type of connector, which is equipped with
electrical terminal(s) as below;
— Dentistry - Coupling dimensions for handpiece connectors - Part 1: Mechanical properties,
1)
— Dentistry - Coupling dimensions for handpiece connectors - Part 2: Electrical connectors .
1) To be prepared by ISO/TC 106/SC 4.
v
DRAFT International Standard ISO/DIS 3964-1:2025(en)
Dentistry — Coupling dimensions for handpiece
connectors —
Part 1:
Mechanical properties
1 Scope
This document specifies the coupling between handpieces and motors, which is not equipped with electronic
terminal(s), connected to dental units.
This document 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.
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 2768-2, General tolerances — Part 2: Geometrical tolerances for features without individual tolerance
indications
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
ISO/DIS 3964-1:2025(en)
4 Classification
4.1 According to the water, air and light supply
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 angled handpieces and motors with internal spray supply and with
light supply;
Type 4: coupling system for straight and angled handpieces and motors without internal spray supply and
with light supply.
5 Requirements
5.1 General
Types of the coupling for handpieces and for motors are specific parts of dental handpieces. Requirements
for dental handpieces are specified in ISO 14457.
5.2 Dimensions
The dimensions and the configuration of handpiece-sides and motor-sides shall be as specified in Figure 1,
Figure 2, Figure 3,Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, coupling dimensions X and X as specified
1 2
in Table 1.
Table 1 — Coupling dimensions X and X
1 2
Coupling Dimension Long Middle Short Extra short
Motor X max. 31,8 mm max. 24,8 mm max. 22,8 mm max.18,8 mm
Handpiece X min. 32 mm min. 25 mm min. 23 mm min.19 mm
Dimensions without tolerances shall be in accordance with ISO 2768-1f and ISO 2768-2K. Alternative designs
of the coupling lock system are permitted.
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.
ISO/DIS 3964-1:2025(en)
Dimensions in millimetres
Key
1 grooves and geometry for sea ling rings given by the manufacturer
2 sealing surface
Edges shall be burr-free or round.
Dimensions d to d are defined as below:
1 38
No. Dimension [mm] No. Dimension [mm] No. Dimension [mm]
+00, 1 ≥12,1
d d 15~30° d
φ98, 7
1 14 27
not used
d ≤φ56, d 15~45° d
2 15 28
≤φ45, not used
d d 1,95 + 0,95 d
3 16 29
+02,
0 n
...
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