ISO 4202:2016

Reduction sleeves with external 7/24 taper for tools with Morse taper shanks

ISO 4202:2016 specifies the dimensions of reduction sleeves with external 7/24 taper (Nos. 30, 40, 45, 50 and 60) for tools with Morse taper shanks (Nos. 1 to 6). All these sleeves allow driving of tools having Morse taper shanks which have a tenon at the small end of the shank; some sleeves allow driving of tools having Morse taper shanks which have an axially tapped hole in the shank: - with the use of an incorporated screw for sleeves 30 × 1 ? 40 × 1 ? 40 × 2 ? 45 × 1 ? 45 × 2 ? 45 × 3 ? 50 × 2 ? 50 × 3 ? 50 × 4 ? 60 × 3 ? 60 × 4 ? 60 × 5; - with the use of a draw bar for sleeves 30 × 1 ? 30 × 2 ? 40 × 1 ? 40 × 2 ? 40 × 3 ? 45 × 1 ? 45 × 2 ? 45 × 3 ? 45 × 4 ? 50 × 2 ? 50 × 3 ? 50 × 4 ? 50 × 5 ? 60 × 3 ? 60 × 4 ? 60 × 5 ? 60 × 6. Morse tapers conform to ISO 296 while 7/24 tapers are in accordance with ISO 297.

Douilles de réduction au cône extérieur 7/24 pour outils à queue cône Morse

ISO 4202:2016 fixe les dimensions des douilles de réduction au cône extérieur 7/24 (n° 30, 40, 45, 50 et 60) pour outils à queue cône Morse (n° 1 à 6). Toutes ces douilles permettent l'entraînement d'outils à queue cône Morse à tenon; certaines d'entre elles permettent également l'entraînement d'outils à queue cône Morse à trou taraudé: - par vis intérieure pour les douilles 30 × 1 ? 40 × 1 ? 40 × 2 ? 45 × 1 ? 45 × 2 ? 45 × 3 ? 50 × 2 ? 50 × 3 ? 50 × 4 ? 60 × 3 ? 60 × 4 ? 60 × 5 - en utilisant la tige de rappel pour les douilles 30 × 1 ? 30 × 2 ? 40 × 1 ? 40 × 2 ? 40 × 3 ? 45 × 1 ? 45 × 2 ? 45 × 3 ? 45 × 4 ? 50 × 2 ? 50 × 3 ? 50 × 4 ? 50 × 5 ? 60 × 3 ? 60 × 4 ? 60 × 5 ? 60 × 6. Les cônes Morse sont conformes à l'ISO 296, les cônes à conicité 7/24 à l'ISO 297.

General Information

• Status: Published
• Publication Date: 23-Oct-2016
• ICS: 25.060.20 - Dividing and tool-workpiece holding devices
• Technical Committee: ISO/TC 29/SC 9 - Tools with defined cutting edges, holding tools, cutting items, adaptive items and interfaces
• Drafting Committee: ISO/TC 29/SC 9 - Tools with defined cutting edges, holding tools, cutting items, adaptive items and interfaces
• Current Stage: 9093 - International Standard confirmed
• Start Date: 31-Oct-2022
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 4202:1978 - Reduction sleeves with external 7/24 taper for tools with Morse taper shanks
• Effective Date: 29-Jun-2013

Overview

ISO 4202:2016 is an international standard published by the International Organization for Standardization (ISO) that specifies the dimensions of reduction sleeves with external 7/24 taper for tools with Morse taper shanks. The standard covers reduction sleeves with designated sizes Nos. 30, 40, 45, 50, and 60 intended for use with Morse taper shanks Nos. 1 to 6. These sleeves enable the secure driving of tools featuring Morse taper shanks, which may have specific end designs such as a tenon or an axially tapped hole.

ISO 4202:2016 ensures interchangeability and compatibility between reduction sleeves and Morse taper tools by defining uniform taper dimensions consistent with ISO 297 (7/24 tapers) and ISO 296 (Morse tapers). This standard plays a vital role in the tooling and machining industry by facilitating reliable tool holding, optimizing machine tool performance, and extending tool life.

Key Topics

• Reduction Sleeves with External 7/24 Taper
  The sleeves feature an external taper conforming to the 7/24 standard, essential for secure fitting on tool holders.

• Compatibility with Morse Taper Shanks
  Designed primarily for tools with Morse taper shanks, which are widely used in machine tools, this standard covers shank sizes Nos. 1 through 6.

• Driving Features of Tools

  • Tools with a tenon at the small end of the shank are compatible with all sleeves.
  • Tools with axially tapped holes require additional fixation, which can be secured by:
    • An incorporated screw (for specific sleeve size combinations).
    • A draw bar system (alternative fixation for various sleeve sizes).

• Dimensional Specifications
  Exact dimensions such as taper angles, lengths, diameters, and tolerances are detailed to ensure fit and function.

• References to Related ISO Standards

  • ISO 296 for Morse taper dimensions and design.
  • ISO 297 for 7/24 taper specifications used in manual tool changes.

• Annex A
  Provides a relationship between this standard’s designations and ISO 13399, the cutting tool data representation and exchange standard.

Applications

ISO 4202 reduction sleeves are integral components in the tooling systems of metalworking and machining operations. Their applications include:

• Machine Tool Tooling Systems
  Allowing adaptation between different tool taper sizes and securing tools firmly in machine spindles or holders.

• Precision Machining
  Supporting accurate and repeatable tool positioning with minimal runout and movement, crucial for high-precision manufacturing.

• Tool Holding and Interchangeability
  Facilitating quick and reliable tool changes on machine tools that handle a variety of tool shank sizes.

• Use with Drawbars and Retention Screws
  Providing flexibility in how tools are retained, accommodating different machine tool designs.

By standardizing these sleeves, ISO 4202 promotes equipment interoperability, reduces downtime through faster tool setup, and improves overall operational safety and efficiency in manufacturing environments.

Related Standards

• ISO 296 – Covers the detailed specifications for Morse tapers used for tool shanks, ensuring self-holding capabilities.

• ISO 297 – Specifies the 7/24 taper dimensions for tool shanks often used for manual changing, directly linked to the external taper of reduction sleeves.

• ISO 13399 – Provides a framework for cutting tool data representation, aiding in the digital exchange of tooling information and referenced in ISO 4202 Annex A for designation alignment.

• ISO 2583 (Withdrawn) – Previously related to tool shank collar dimensions and may be considered for historical context or transition purposes.

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Keywords: ISO 4202, reduction sleeves, 7/24 taper, Morse taper shanks, tool holding, machining standards, tool adapter sleeves, tool shank dimensions, machine tools, tool retention, ISO 296, ISO 297, manufacturing tooling standards.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 4202
Third edition
2016-11-01
Reduction sleeves with external 7/24
taper for tools with Morse taper shanks
Douilles de réduction au cône extérieur 7/24 pour outils à queue
cône Morse
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 2
Annex A (informative) Relationship between designations in this document and
ISO 13399 (all parts) . 3
Bibliography . 4
Foreword
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NORME ISO
INTERNATIONALE 4202
Troisième édition
2016-11-01
Douilles de réduction au cône
extérieur 7/24 pour outils à queue
cône Morse
Reduction sleeves with external 7/24 taper for tools with Morse
taper shanks
Numéro de référence
©
ISO 2016
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2016, Publié en Suisse
Droits de reproduction réservés. Sauf indication contraire, 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, l’affichage sur
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l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – Tous droits réservés

Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Dimensions . 2
Annexe A (informative) Relation entre les désignations dans le présent document et
l’ISO 13399 (toutes les parties) . 3
Bibliographie . 4
Avant-propos
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nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est
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