ISO 239:1999
(Main)Drill chuck tapers
Drill chuck tapers
Cônes d'emmanchement pour mandrins de perceuse
La présente Norme internationale spécifie les dimensions des cônes d'emmanchement pour mandrins de perceuse comprenant les deux types distincts suivants:a) type à cône Morse;b) type à cône Jacobs.Elle comporte, pour chaque type de cône d'emmanchement, un tableau donnant les dimensions.
General Information
Relations
Overview
ISO 239:1999 is the international standard that specifies the dimensions and interchangeability rules for drill chuck tapers. Prepared by ISO/TC 29 (Small tools), this second edition (1999) covers the two principal taper families used in drill chucks: Morse tapers and Jacobs tapers. The standard provides tabulated dimensions and guidance on designation to support consistent manufacturing, selection and maintenance of drill chuck toolholders.
Key Topics
- Scope and types covered: The standard defines two distinct taper types - Morse taper type and Jacobs taper type - and supplies dimensional tables for each.
- Interchangeability guidance: ISO 239 explains how taper portions correspond to established Morse or Jacobs taper numbers and clarifies the relationship between short and standard tapers.
- Designation rules: The document prescribes a concise, standardized designation format, for example:
Taper ISO 239 - B16s(Morse taper, short)Taper ISO 239 - B16(Morse taper)Taper ISO 239 - J2s(Jacobs taper, short)
- Reference tables and figures: The standard includes figures and tables with the dimensional data and notes on effective values obtained by applying taper rates to basic dimensions.
Practical keywords: ISO 239:1999, drill chuck tapers, Morse taper, Jacobs taper, interchangeability, toolholder compatibility, taper designation.
Applications
ISO 239:1999 is directly applicable to manufacturers, toolroom engineers and maintenance teams who need consistent, interoperable drill chuck interfaces. Typical applications include:
- Manufacturing and inspection of drill chucks and arbor components to ensure dimensional conformity.
- Selecting compatible toolholders and adapters for drills and machine tools.
- Streamlining maintenance and replacement procedures through standardized taper designation and compatibility notes.
- Reducing downtime by ensuring spares and replacement chucks fit correctly across machines that use Morse or Jacobs tapers.
Benefits include improved toolholder compatibility, safer operation due to predictable fit and reduced risk of misfitting components, and simplified inventory management for spare parts.
Related Standards
- ISO 239:1999 was prepared by ISO/TC 29 (Small tools); users should consider other ISO documents on small tools and toolholder interfaces for broader context.
- The standard follows the ISO/IEC Directives for drafting and publication; related standards on machine tool spindle interfaces and tooling may provide complementary guidance.
For implementers, ISO 239:1999 is a practical reference to ensure drill chuck tapers conform to internationally recognized dimensional and designation practices, promoting interchangeability and operational safety.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 239
Second edition
1999-10-01
Drill chuck tapers
Cônes d'emmanchement pour mandrins de perceuse
A
Reference number
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 239 was prepared by Technical Committee ISO/TC 29, Small tools.
This second edition cancels and replaces the first edition (ISO 239:1974) which has been technically revised.
© ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
INTERNATIONAL STANDARD © ISO ISO 239:1999(E)
Drill chuck tapers
1 Scope
This International Standard lays down the dimensions of drill chuck tapers and includes two distinct types :
a) Morse taper type;
b) Jacobs taper type.
It includes, for each type of taper, a table giving the dimensions.
2 Interchangeability
2.1 Morse taper type
See Figure 1 and Table 1.
The tapered portions are identical with the following Morse tapers:
No.1, for tapers B6, B10 and B12;
No.2, for tapers B16 and B18;
No.3, for tapers B22 and B24.
The length of each of these tapers is, of course, distinctly less than the overall length of the corresponding Morse
taper; each taper may be regarded as corresponding approximately either to that part of Morse taper nearest the
small end (e.g. B10) or to the part nearest the large end (e.g. B12).
2.2 Jacobs taper type
See Figure 2 and Table 2.
Table 2 reproduces and classifies the normal dimensions of Jacobs tapers; they also observe the generally
ac
...
NORME ISO
INTERNATIONALE 239
Deuxième édition
1999-10-01
Cônes d'emmanchement pour mandrins
de perceuse
Drill chuck tapers
A
Numéro de référence
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 (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI, Partie 3.
Les projets de Normes internationales adoptés par les comités techniques sont soumis aux comités membres pour
vote. Leur publication comme Normes internationales requiert l'approbation de 75 % au moins des comités
membres votants.
La Norme internationale ISO 239 a été élaborée par le comité technique ISO/TC 29, Petit outillage.
Cette deuxième édition annule et remplace la première édition (ISO 239:1974), dont elle constitue une révision
technique.
© ISO 1999
Droits de reproduction réservés. Sauf prescription différente, 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 et les microfilms, sans l'accord écrit de l'éditeur.
Organisation internationale de normalisation
Case postale 56 • CH-1211 Genève 20 • Suisse
Internet iso@iso.ch
Imprimé en Suisse
ii
NORME INTERNATIONALE © ISO ISO 239:1999(F)
Cônes d'emmanchement pour mandrins de perceuse
1 Domaine d’application
La présente Norme internationale spécifie les dimensions des cônes d'emmanchement pour mandrins de perceuse
comprenant les deux types distincts suivants:
a) type à cône Morse;
b) type à cône Jacobs.
Elle comporte, pour chaque type de cône d'emmanchement, un tableau donnant les dimensions.
2 Interchangeabilité
2.1 Type à cône Morse
Voir Figure 1 et Tableau 1.
Les conicités sont identiques à celles des cônes Morse suivants:
n° 1, pour les cônes B6, B10 et B12;
n° 2, pour les cônes B16 et B18;
n° 3, pour les cônes B22 et B24.
La longueur de chacun de ces cônes est nettement inférieure à la longueur totale du cône Morse correspondant,
chaque cône pouvant être considéré comme correspondant approximativement à la partie d'un cône Morse se
situant soit du côté du petit bout (par exemple B10), soit, au contraire, du côté du gros bout (par exemple B12).
2.2 Type à cône Jacobs
Voir Figure 2 et Tableau 2.
Le Tableau 2 reproduit, en les codifiant, les dimensions courantes des cônes Jacobs, en respectant également les
dénominations usuelles,
...
Frequently Asked Questions
ISO 239:1999 is a standard published by the International Organization for Standardization (ISO). Its full title is "Drill chuck tapers". This standard covers: La présente Norme internationale spécifie les dimensions des cônes d'emmanchement pour mandrins de perceuse comprenant les deux types distincts suivants:a) type à cône Morse;b) type à cône Jacobs.Elle comporte, pour chaque type de cône d'emmanchement, un tableau donnant les dimensions.
La présente Norme internationale spécifie les dimensions des cônes d'emmanchement pour mandrins de perceuse comprenant les deux types distincts suivants:a) type à cône Morse;b) type à cône Jacobs.Elle comporte, pour chaque type de cône d'emmanchement, un tableau donnant les dimensions.
ISO 239:1999 is classified under the following ICS (International Classification for Standards) categories: 25.100.30 - Drills, countersinks, reamers. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 239:1999 has the following relationships with other standards: It is inter standard links to ISO 12625-12:2010, ISO 239:1974. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 239:1999 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
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