Abstract

This document specifies dimensions of tapered shanks for modular taper interfaces with ball track system with four locking elements for automatic and manual tool exchange to be applied on machine tools (e.g. lathe machines, drilling machines, milling machines and turn/milling machine centres). A range of shank sizes is specified. Details of the coolant sealing coolant tube and coolant sealing O-ring shall be specified according to Annex A and Annex B. The shank incorporates a flange with a groove to enable automatic tool exchange. The tools can also be exchanged manually. The clamping of the shank can be realized using locking balls of a standard size and by a variety of mechanisms.

Status
Published
Publication Date
02-Aug-2026
Current Stage
6060 - International Standard published
Start Date
03-Aug-2026
Due Date
28-Dec-2025
Completion Date
03-Aug-2026

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ISO 26622-3:2026 - Modular taper interface with ball track system — Part 3: Dimensions of shanks for interface utilizing four locking elements

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ISO 26622-3:2026 - Interfaces à cône modulaire avec système de serrage à billes — Partie 3: Dimensions de la queue pour une interface utilisant quatre éléments de verrouillage

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ISO 26622-3:2026 is an International Standard from ISO for modular taper interfaces with ball track system, Part 3. It specifies the dimensions of tapered shanks with four locking elements for automatic and manual tool exchange on machine tools such as lathes, drilling machines, milling machines and turn/milling machine centres. The document also covers coolant-sealing details, material and heat-treatment requirements, designation, and related design guidance for TS4X shanks.

What does ISO 26622-3:2026 specify?

ISO 26622-3:2026 specifies the dimensions of tapered shanks for modular taper interfaces with ball track system using four locking elements. It is aimed at shanks that can be exchanged automatically or manually, and it includes the geometry needed for the flange, groove and clamping arrangement.

The document is organized into:

  • Scope
  • Normative references
  • Terms and definitions
  • Dimensions
  • Design
  • Designation
  • Annexes A to C

The annexes add application details that sit alongside the shank dimensions.

AnnexWhat it covers
Annex ADetails of the high-pressure coolant tube
Annex BO-rings for coolant sealing
Annex CRecommendation for use and application

What are the key requirements of ISO 26622-3:2026?

ISO 26622-3:2026 is primarily a dimensional and design standard. The key points are the tolerance rules, the shank geometry, the coolant-sealing provisions, the material and heat-treatment condition, and the naming of the part.

Geometry and tolerances

Clause 4 says tolerances are governed by ISO 8015, and general geometrical tolerancing follows ISO 22081. The document also sets a surface profile requirement of 0.2 mm relative to the primary datum A, secondary datum B and tertiary datum C.

Table 1 gives the permitted linear deviations by nominal size, and Table 2 does the same for angular dimensions. In practice, this tells the manufacturer how much dimensional variation is allowed when making the shank, so the interface still fits and repeats correctly.

Clause 4.2 defines the tapered hollow shank and its detailed shape in Figure 1 and Table 3. The shank includes features for the data chip hole, gage face, ejection face and optional coolant hole. That matters because tool holders, machining operations and inspection gauges have to match the same interface geometry.

Design features

Clause 5.1 allows a data chip hole in the design. Clause 5.2 adds an optional protection zone for static, non-rotating applications such as turning machines, while the protection zone shown in Figure 1 and Table 3 is preferred for rotating applications. For users, this means the same family of shanks can be adapted for different machine motions and protection needs.

Clause 5.3 states that the clamping system shall provide enough force to seat the taper and keep the shank flange against the receiver face. Annex C gives a recommended clamping-force range for the four-locking-ball version, and notes that lower force can suit lighter loads while higher force can be needed for heavy machining. In practice, this helps designers and maintenance teams set the clamping system for the real duty of the machine.

Material, heat treatment and balancing

Clause 5.4 requires TS4X shanks to be made from tempering steel with minimum core strength of 800 N/mm and surface hardness of 50 + 4 HRC after hardening, tempering and finish grinding. This gives a clear target for manufacturing and incoming inspection, so the holder has the strength and wear resistance expected for repeated tool exchange.

Clause 5.5 says balancing may be carried out in the marked areas shown in Figure 3 when balancing is required. The balance feature location is tied to the dimensions in Table 3. For users, this is relevant when the shank will run at speed and vibration needs to be controlled.

Designation

Clause 6 defines how to name the product: the designation includes “Modular taper shank”, the reference to ISO 26622-3:2026, the symbol TS4X, and the nominal size in millimetres. The example designation is given as Modular taper shank ISO 26622-3 - TS4X63. That makes ordering, labeling and specification checking straightforward.

Coolant sealing

Annex A requires a high-pressure coolant tube when pressures above 20 MPa are needed, and it gives the associated tube dimensions, locking nut, backup rings and O-ring arrangement. Annex B requires an O-ring retained in a groove in the internal diameter of the shank to seal coolant between the shank and the clamping mechanism, and it recommends fluorocarbon with 90 Shore A hardness. This is important where coolant must pass through the tool holder without leakage.

What terms does ISO 26622-3:2026 define?

Key terms used in ISO 26622-3:2026 include:

  • TS4X - the designation symbol for the shank type covered by this part, identifying the four-locking-element interface.
  • Modular taper shank - the tapered shank that engages with the ball track system and receiver.
  • Locking elements - the four elements that retain the shank in the interface during automatic or manual tool exchange.
  • Gage face - the reference face shown in the figure from which several dimensions are taken.
  • Ejection face - the face used in the tool release and exchange arrangement.
  • Protection zone - the optional area used for static, non-rotating applications.
  • High-pressure coolant tube - the tube assembly in Annex A used when coolant pressure is above 20 MPa.
  • O-ring - the sealing ring retained by a groove to prevent coolant leakage.

Who uses ISO 26622-3:2026?

ISO 26622-3:2026 is used by machine tool builders, tool-holder manufacturers, clamping-system designers and suppliers of receivers for modular taper interfaces. It is also relevant to production engineers, quality managers and buyers who need to verify that a shank will fit the intended machine and exchange system.

In practice, these users rely on the standard when they:

  • design a shank or receiver interface
  • specify tolerances and fit-up
  • choose coolant-sealing parts
  • set clamping force targets
  • check material and heat-treatment condition
  • define part designation for procurement and traceability

What changed in ISO 26622-3:2026 from the previous edition?

ISO 26622-3:2026 is the first edition of this part.

Which standards are used with ISO 26622-3:2026?

ISO 26622-3:2026 names two normative references:

  • ISO 8015 - provides the GPS fundamentals used for the tolerance rules in Clause 4.
  • ISO 22081 - provides general geometrical and general size specifications used for the general tolerance approach.

The bibliography also points to:

  • ISO 1101 - geometrical tolerancing of form, orientation, location and run-out.
  • ISO 3040 - dimensioning and tolerancing of cones.
  • ISO 26622-4 - the companion part for receivers with four locking elements.

What does the ISO 26622-3:2026 document contain?

ISO 26622-3:2026 contains a set of engineering drawings and dimensional tables for the TS4X shank family. Figure 1 and Table 3 define the tapered hollow shank, its labelled faces, optional coolant hole and the detailed dimensions that go with each nominal size.

The document also includes:

  • Table 1 for linear tolerances
  • Table 2 for angular tolerances
  • Figure 2 and Table 4 for the optional static protection zone
  • Figure 3 for balancing areas
  • Annex A Figure A.1 and Table A.1 for the high-pressure coolant tube
  • Annex B Figure B.1 and Table B.1 for the coolant-sealing O-ring
  • Annex C Table C.1 for recommended clamping-force ranges and application notes

For users, these tables and figures are the working data used in design, manufacturing, inspection and machine-tool integration.

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ISO 26622-3:2026 - Modular taper interface with ball track system — Part 3: Dimensions of shanks for interface utilizing four locking elements

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ISO 26622-3:2026 - Interfaces à cône modulaire avec système de serrage à billes — Partie 3: Dimensions de la queue pour une interface utilisant quatre éléments de verrouillage

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Frequently Asked Questions

ISO 26622-3:2026 is a standard published by the International Organization for Standardization (ISO). Its full title is "Modular taper interface with ball track system — Part 3: Dimensions of shanks for interface utilizing four locking elements". This standard covers: This document specifies dimensions of tapered shanks for modular taper interfaces with ball track system with four locking elements for automatic and manual tool exchange to be applied on machine tools (e.g. lathe machines, drilling machines, milling machines and turn/milling machine centres). A range of shank sizes is specified. Details of the coolant sealing coolant tube and coolant sealing O-ring shall be specified according to Annex A and Annex B. The shank incorporates a flange with a groove to enable automatic tool exchange. The tools can also be exchanged manually. The clamping of the shank can be realized using locking balls of a standard size and by a variety of mechanisms.

This document specifies dimensions of tapered shanks for modular taper interfaces with ball track system with four locking elements for automatic and manual tool exchange to be applied on machine tools (e.g. lathe machines, drilling machines, milling machines and turn/milling machine centres). A range of shank sizes is specified. Details of the coolant sealing coolant tube and coolant sealing O-ring shall be specified according to Annex A and Annex B. The shank incorporates a flange with a groove to enable automatic tool exchange. The tools can also be exchanged manually. The clamping of the shank can be realized using locking balls of a standard size and by a variety of mechanisms.

ISO 26622-3:2026 is classified under the following ICS (International Classification for Standards) categories: 25.060.20 - Dividing and tool-workpiece holding devices. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 26622-3:2026 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)


International
Standard
ISO 26622-3
First edition
Modular taper interface with ball
2026-08
track system —
Part 3:
Dimensions of shanks for interface
utilizing four locking elements
Interfaces à cône modulaire avec système de serrage à billes —
Partie 3: Dimensions de la queue pour une interface utilisant
quatre éléments de verrouillage
Reference number
© ISO 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication 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 at the address below
or ISO’s member body in the country of the requester.
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
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 1
4.1 General .1
4.2 Tapered hollow shank .2
5 Design .10
5.1 Data chip hole .10
5.2 Protection zone .10
5.3 Clamping force .10
5.4 Material and heat treatment .10
5.5 Balancing .11
6 Designation .11
Annex A (normative) Details of high-pressure coolant tube .12
Annex B (normative) O-rings . . 14
Annex C (informative) Recommendation for use and application .15
Bibliography .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 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).
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 29, Small tools, Subcommittee SC 9, Tools with
defined cutting edges, holding tools, cutting items, adaptive items and interfaces.
A list of all parts in the ISO 26622 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
International Standard ISO 26622-3:2026(en)
Modular taper interface with ball track system —
Part 3:
Dimensions of shanks for interface utilizing four locking
elements
1 Scope
This document specifies dimensions of tapered shanks for modular taper interfaces with ball track system
with four locking elements for automatic and manual tool exchange to be applied on machine tools (e.g. lathe
machines, drilling machines, milling machines and turn/milling machine centres). A range of shank sizes is
specified. Details of the coolant sealing coolant tube and coolant sealing O-ring shall be specified according
to Annex A and Annex B.
The shank incorporates a flange with a groove to enable automatic tool exchange. The tools can also be
exchanged manually. The clamping of the shank can be realized using locking balls of a standard size and by
a variety of mechanisms.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 8015, Geometrical product specifications (GPS) — Fundamentals — Concepts, principles and rules
ISO 22081, Geometrical product specifications (GPS) — Geometrical tolerancing — General geometrical
specifications and general size specifications
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:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Dimensions
4.1 General
Tolerances shall be in accordance with ISO 8015.
General tolerances shall be in accordance to ISO 22081, such that the surface profile be within a tolerance
of 0,2 mm with respect to the primary datum A, secondary datum B, and tertiary datu
...


Norme
internationale
ISO 26622-3
Première édition
Interfaces à cône modulaire avec
2026-08
système de serrage à billes —
Partie 3:
Dimensions de la queue pour une
interface utilisant quatre éléments
de verrouillage
Modular taper interface with ball track system —
Part 3: Dimensions of shanks for interface utilizing four locking
elements
Numéro de référence
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2026
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Dimensions . 1
4.1 Généralités .1
4.2 Queue conique creuse .2
5 Conception .10
5.1 Logement de puce de données .10
5.2 Zone de protection .10
5.3 Effort de serrage .10
5.4 Matériaux et traitement thermique .10
5.5 Equilibrage .11
6 Désignation .11
Annexe A (normative) Détails du tube pour liquide de refroidissement haute pression .12
Annexe B (normative) Joints toriques . . 14
Annexe C (informative) Recommandations pour l’utilisation et l’application .15
Bibliographie .16

iii
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux
de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général
confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a
été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité de
tout droit de propriété revendiqué à cet égard. À la date de publication du présent document, l’ISO n'avait pas
reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application. Toutefois,
il y a lieu d’avertir les responsables de la mise en application du présent document que des informations
plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à l'adresse
www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne pas avoir identifié tout ou partie de
tels droits de propriété.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion de
l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 29, Petit outillage, sous-comité SC 9, Outils
à arêtes de coupe définies, éléments coupants, porte-outils, éléments relatifs aux attachements et interfaces.
Une liste de toutes les parties de la série ISO 26622 se trouve sur le site web de l’ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes se
trouve à l’adresse www.iso.org/fr/members.html.

iv
Norme internationale ISO 26622-3:2026(fr)
Interfaces à cône modulaire avec système de serrage à
billes —
Partie 3:
Dimensions de la queue pour une interface utilisant quatre
éléments de verrouillage
1 Domaine d’application
Le présent document spécifie les dimensions des queues coniques pour interfaces à cône modulaire à
système de serrage à billes à quatre éléments de verrouillage pour le changement automatique et manuel
d’outils à utiliser sur les machines-outils (par exemple, machines de tournage, machines de perçage,
machines de fraisage et machines de tournage-fraisage). Une gamme de dimensions des queues est spécifiée.
Les détails du tube d'étanchéité pour liquide de refroidissement et du joint torique d'étanchéité pour liquide
de refroidissement doivent être spécifiés conformément à l'Annexe A et à l'Annexe B.
La queue comprend une collerette rainurée permettant le changement automatique de l’outil. Les outils
peuvent également être changés manuellement. Le serrage de la queue peut être réalisé en utilisant des
billes de blocage de dimensions normalisées et divers mécanismes.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique. Pour
les références non datées, la dernière édition du document de référence s'applique (y compris les éventuels
amendements).
ISO 8015, Spécification géométrique des produits (GPS) — Principes fondamentaux — Concepts, principes et
règles
ISO 22081, Spécification géométrique des produits (GPS) — Tolérancement géométrique — Spécifications
géométriques générales et spécifications de taille générales
3 Termes et définitions
Aucun terme n'est défini dans le présent document.
L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en normalisation,
consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l'adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l'adresse https:// www .electropedia .org/
4 Dimensions
4.1 Généralités
Les tolérances doivent être conformes à l'ISO 8015.

Les tolérances générales doivent être conformes à l'ISO 22081, de telle sorte que le profil de surface se situe
dans une tolérance de 0,2 mm par rapport à la référence primaire A, à la référence secondaire B et à la
référence tertiaire C. De plus, les écarts admissibles pour les dimensions linéaires non spécifiés autrement
doivent être conformes aux valeurs définies dans le Tableau 1 et les écarts admissib
...