ISO/TS 21108:2005
(Main)Hand-held power tools - Impulse wrenches - Dimensions and tolerances of interface to power socket
Hand-held power tools - Impulse wrenches - Dimensions and tolerances of interface to power socket
ISO/TS 21108:2005 specifies the dimensions and tolerances for the interface between impulse wrenches and their power sockets: output spindle of power tool/female drive end of power socket. This interface is based on the principle of a socket centred on the cylindrical spindle. Alternative dimensions and tolerances for two options, A and B, are provided. It is applicable to both pneumatically and electrically driven impulse tools, and could also be used in other applications.
Machines portatives — Clés à impulsion — Dimensions et tolérances de l'interface pour douille-machine
L'ISO 21108:2005 spécifie les dimensions et les tolérances de l'interface entre les clés à impulsion et leur douille-machine: broche de sortie de la machine portative de l'entraînement femelle de la douille-machine. L'interface est basée sur le principe d'une douille centrée sur la broche cylindrique. D'autres dimensions et tolérances de deux séries optionnelles, A et B sont fournies. Elle est applicable aux clés à impulsion à alimentation pneumatique ou électrique et pourrait être aussi utilisée pour d'autres applications.
General Information
- Status
- Published
- Publication Date
- 07-Jun-2005
- Technical Committee
- ISO/TC 118/SC 3 - Pneumatic tools and machines
- Drafting Committee
- ISO/TC 118/SC 3 - Pneumatic tools and machines
- Current Stage
- 9092 - International Standard to be revised
- Start Date
- 26-Feb-2025
- Completion Date
- 13-Dec-2025
Overview
ISO/TS 21108:2005 is a technical specification published by the International Organization for Standardization (ISO) that defines precise dimensions and tolerances for the interface between hand-held impulse wrenches and their power sockets. This standard focuses on the critical connection between the output spindle of the impulse wrench and the female drive end of the power socket. It addresses both pneumatically and electrically driven impulse tools, aiming to standardize interfaces to improve compatibility, safety, and performance.
The interface described is based on a socket centered on a cylindrical spindle, with two design options-Option A and Option B-to accommodate variations in impulse wrench designs. The purpose is to reduce vibrations, increase torque accuracy, decrease energy loss, and enhance operator ergonomics, thereby supporting higher quality and safer tool usage.
Key Topics
ISO/TS 21108:2005 covers several important areas in detail:
- Dimensions and Tolerances: Specifies exact measurements for the male spindle end (the output shaft of the impulse wrench) and the female drive end (the receiving side of the power socket). This includes spindle diameter, square dimensions, length, and width across flats with permissible tolerances adhering to precise limits.
- Two Interface Options: Provides alternative dimensional series (Option A and Option B), acknowledging existing design variations in the market. This dual-option approach helps in gradual harmonization and flexibility across manufacturers and applications.
- Compatibility: Applies to both pneumatic and electric impulse wrenches, enabling broad adoption in various industries with differing power sources.
- Safety and Ergonomics: Centered socket engagement reduces wobbling and vibrations, which lowers injury risk and improves operator comfort during extended use.
- Energy Efficiency: Optimized interface dimensions help minimize energy loss during torque transmission, contributing to more sustainable tool operation.
Applications
The dimensional and tolerance requirements outlined in ISO/TS 21108:2005 are critical for manufacturers, engineers, and end-users involved with:
- Hand-held impulse wrenches used extensively in automotive, aerospace, construction, and manufacturing industries for the installation and removal of threaded fasteners.
- Designing and producing power sockets that must securely and precisely fit onto impulse wrench spindles, ensuring reliable torque transfer.
- Maintenance and quality control processes that require interchangeable tool interfaces to avoid operational delays and compatibility issues.
- Developing ergonomic and safety-enhanced pneumatic and electric torque tools with consistent performance across tool and socket pairings.
- Custom tool design where adherence to standardized dimensions prevents development of incompatible or unsafe tools, streamlining tooling inventories and reducing costs.
The standard even suggests adaptability for other tool applications beyond impulse wrenches, promoting uniformity and interoperability in power tool interfaces.
Related Standards
ISO/TS 21108:2005 references and complements several other relevant ISO and EN standards that support the use and safety of power tools:
- ISO 1174-2: Defines driving squares for power socket tools, crucial for accurate dimensioning of the spindle and socket squares.
- ISO 5391: Provides terminology for pneumatic tools and machines, ensuring consistent language and definitions related to impulse wrenches.
- EN 792-6: Addresses safety requirements specifically for hand-held non-electric power tools including assembly power tools for threaded fasteners, emphasizing safe operational practices.
Together, these standards form a cohesive framework ensuring the compatibility, safety, and performance of hand-held power tools and their accessories.
By following ISO/TS 21108:2005 specifications, manufacturers and users can achieve precise mechanical interfaces for impulse wrenches and sockets-enhancing tool lifespan, operational accuracy, and worker safety while supporting global trade and interoperability of hand-held power tools.
ISO/TS 21108:2005 - Hand-held power tools — Impulse wrenches — Dimensions and tolerances of interface to power socket Released:6/8/2005
ISO/TS 21108:2005 - Machines portatives — Clés à impulsion — Dimensions et tolérances de l'interface pour douille-machine Released:6/8/2005
Frequently Asked Questions
ISO/TS 21108:2005 is a technical specification published by the International Organization for Standardization (ISO). Its full title is "Hand-held power tools - Impulse wrenches - Dimensions and tolerances of interface to power socket". This standard covers: ISO/TS 21108:2005 specifies the dimensions and tolerances for the interface between impulse wrenches and their power sockets: output spindle of power tool/female drive end of power socket. This interface is based on the principle of a socket centred on the cylindrical spindle. Alternative dimensions and tolerances for two options, A and B, are provided. It is applicable to both pneumatically and electrically driven impulse tools, and could also be used in other applications.
ISO/TS 21108:2005 specifies the dimensions and tolerances for the interface between impulse wrenches and their power sockets: output spindle of power tool/female drive end of power socket. This interface is based on the principle of a socket centred on the cylindrical spindle. Alternative dimensions and tolerances for two options, A and B, are provided. It is applicable to both pneumatically and electrically driven impulse tools, and could also be used in other applications.
ISO/TS 21108:2005 is classified under the following ICS (International Classification for Standards) categories: 25.140.10 - Pneumatic tools. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO/TS 21108:2005 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)
TECHNICAL ISO/TS
SPECIFICATION 21108
First edition
2005-06-01
Hand-held power tools — Impulse
wrenches — Dimensions and tolerances
of interface to power socket
Machines portatives — Clés à impulsion — Dimensions et tolérances
de l'interface pour douille-machine
Reference number
©
ISO 2005
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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
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International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
In other circumstances, particularly when there is an urgent market requirement for such documents, a
technical committee may decide to publish other types of normative document:
an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in
an ISO working group and is accepted for publication if it is approved by more than 50 % of the members
of the parent committee casting a vote;
an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical
committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting
a vote.
An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a
further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is
confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an
International Standard or be withdrawn.
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.
ISO/TS 21108 was prepared by Technical Committee ISO/TC 118, Compressors and pneumatic tools,
machines and equipment, Subcommittee SC 3, Pneumatic tools and machines.
Introduction
When power sockets for hand-held pulse wrenches are centred on the cylindrical surface of the spindle,
several advantages are achieved.
Through this centred engagement
vibrations and wobbling are reduced, in turn reducing the risk for injury and improving operator
ergonomics,
torque accuracy is increased, improving the quality of the production, and
energy loss is reduced, saving energy.
The variety of dimensions on the spindle diameter has created a need for sta
...
SPÉCIFICATION ISO/TS
TECHNIQUE 21108
Première édition
2005-06-01
Machines portatives — Clés à
impulsion — Dimensions et tolérances de
l'interface pour douille-machine
Hand-held power tools — Impulse wrenches — Dimensions and
tolerances of interface to power socket
Numéro de référence
©
ISO 2005
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Publié en Suisse
ii © ISO 2005 – Tous droits réservés
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 2.
La tâche principale des comités techniques est d'élaborer les Normes internationales. 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.
Dans d'autres circonstances, en particulier lorsqu'il existe une demande urgente du marché, un comité
technique peut décider de publier d'autres types de documents normatifs:
une Spécification publiquement disponible ISO (ISO/PAS) représente un accord entre les experts dans
un groupe de travail ISO et est acceptée pour publication si elle est approuvée par plus de 50 % des
membres votants du comité dont relève le groupe de travail;
une Spécification technique ISO (ISO/TS) représente un accord entre les membres d'un comité technique
et est acceptée pour publication si elle est approuvée par 2/3 des membres votants du comité.
Une ISO/PAS ou ISO/TS fait l'objet d'un examen après trois ans afin de décider si elle est confirmée pour trois
nouvelles années, révisée pour devenir une Norme internationale, ou annulée. Lorsqu'une ISO/PAS ou
ISO/TS a été confirmée, elle fait l'objet d'un nouvel examen après trois ans qui décidera soit de sa
transformation en Norme internationale soit de son annulation.
L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable de ne
pas avoir identifié de tels droits de propriété et averti de leur existence.
L'ISO/TS 21108 a été élaborée par le comité technique ISO/TC 118, Compresseurs et outils, machines et
équipement pneumatique, sous-comité SC 3, Outils et machines pneumatiques.
Introduction
Lorsque les douilles-machines pour les clés à impulsion portatives sont centrées sur la surface cylindrique de
la broche, on garantit plusieurs avantages.
Via cette fixation centrée
les vibrations et le déséquilibre dans la rotation sont réduits, ce qui engendre la réduction du risque de
blessure et améliore l'ergonomie de l'opérateur,
l'exactitude du moment est augmentée, améliorant ainsi la qualité de la production, et
la perte d'énergie est réduite, ce qui favorise les économies d'énergie.
La variété des dimensions sur le diamètre de la broche a engend
...
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