ISO 3291:2016

Extra-long Morse taper shank twist drills

ISO 3291:2016 specifies the dimensions of extra-long Morse taper shank drills in the range of 6 mm to 50 mm diameter with an overall length range of 200 mm to 630 mm.

Forets extra-longs à queue cône Morse

ISO 3291:2016 spécifie les dimensions des forets à queue cône Morse, série extra-longue, de diamètre compris entre 6 mm et 50 mm et de longueur totale comprise entre 200 mm et 630 mm.

General Information

• Status: Published
• Publication Date: 23-Oct-2016
• ICS: 25.100.30 - Drills, countersinks, reamers
• 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 3291:1995 - Extra-long Morse taper shank twist drills
• Effective Date: 29-Jun-2013

Overview

ISO 3291:2016 is an international standard that specifies the dimensions and technical requirements for extra-long Morse taper shank twist drills. Covering drill diameters from 6 mm to 50 mm and overall lengths ranging between 200 mm and 630 mm, this standard ensures compatibility and interchangeability of these drills in industrial machining applications. First published in 2016, ISO 3291 provides detailed guidelines to manufacturers and users for producing and selecting high-quality extra-long Morse taper drills that meet consistent performance benchmarks.

Key Topics

• Dimensions and Sizes: The standard defines preferred sizes for drill diameters and overall lengths, using precise measurements for dimensions such as flute length and Morse taper shank numbers. This helps in uniform manufacturing and fitting to machine tools.

• Technical Specifications: ISO 3291 refers to other crucial standards like ISO 10899 for technical requirements regarding high-speed steel two-flute twist drills, ensuring drills meet durability and accuracy criteria.

• Designation System: The standard establishes a clear designation format incorporating the term "twist drill," reference number ISO 3291, drill diameter in millimeters, and overall length in millimeters (e.g., Twist drill ISO 3291 - 10 - 250).

• Compatibility with ISO 13399: Annex A links ISO 3291’s designation system to ISO 13399, which standardizes cutting tool data representation and exchange, facilitating easier tool management and integration into digital systems.

Applications

• Machining Operations: Extra-long Morse taper shank twist drills are crucial for applications requiring deep hole drilling where extended reach is necessary without sacrificing tool stability or precision.

• Manufacturing Industry: Widely used in metalworking industries including automotive, aerospace, and tooling, these drills enhance productivity by enabling machining of thick or deep components.

• Machine Tool Compatibility: The Morse taper shank design ensures a self-holding fit in machine tool spindles, resulting in minimal vibration and improved accuracy during drilling processes.

• Tooling Standardization: Adhering to ISO 3291 protects against mismatched tooling and increases safety and operational reliability in machine shops.

Related Standards

• ISO 296: Specifies self-holding tapers for tool shanks that align with Morse taper specifications referenced in ISO 3291.

• ISO 10899: Covers technical specifications for high-speed steel two-flute twist drills, ensuring drills meet performance and material quality requirements.

• ISO 235: Defines parallel shank jobber and stub series drills, complementing the long and extra-long drill specifications of ISO 3291.

• ISO 494: Addresses cylindrical shank twist drills for the long series, relevant for comparison and application alongside Morse taper drills.

• ISO 3292: Concerns extra-long parallel shank twist drills, providing alternative drill types where parallel rather than taper shanks are required.

• ISO 13399: Focuses on cutting tool data representation and exchange, essential for digital tool management and linking ISO 3291 designations to standardized data files.

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By following ISO 3291:2016, manufacturers and users benefit from enhanced precision, interchangeability, and safety in extra-long Morse taper twist drilling tools. This standard supports industrial machining efficiency by defining universally accepted dimensions, technical parameters, and concise product identification. For professionals in machining, tooling, and manufacturing sectors, ISO 3291 is an essential reference to ensure quality, compatibility, and streamlined tool selection.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 3291
Third edition
2016-11-01
Extra-long Morse taper shank twist
drills
Forets extra-longs 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 Dimensions . 1
4 Technical specifications . 1
5 Designations . 1
Annex A (informative) Relationship between designations in this International Standard
and ISO 13399 (all parts) . 4
Bibliography . 5
Foreword
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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Technical Barriers
...

NORME ISO
INTERNATIONALE 3291
Troisième édition
2016-11-01
Forets extra-longs à queue cône Morse
Extra-long Morse taper shank twist drills
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
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
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 Dimensions . 1
4 Spécifications techniques . 1
5 Désignation . 1
Annexe A (informative) Relation entre les désignations dans la présente Norme
internationale et l’ISO 13399 (toutes les parties) . 4
Bibliographie . 5
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
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