ISO 4228:1986

Spanners and wrenches — Spline drive ends for power socket wrenches

Covers both the male end dimensions, and the female end dimensions. The pitch p/ps as given in the tables defines the spline dimensions. The first number is the diametral pitch; the second number is the stub pitch; it denotes, as the fractional part of an inch, the basic radial length of engagement, both above and below the pitch circle. The module denotes the number of units of pitch diameter per tooth, in millimetres.

Outils de manoeuvre pour vis et écrous — Entraînement à cannelures pour douilles machines

General Information

• Status: Published
• Publication Date: 01-Oct-1986
• ICS: 25.140.01 - Hand-held tools in general
• Technical Committee: ISO/TC 29/SC 10 - Assembly tools for screws and nuts, pliers and nippers
• Drafting Committee: ISO/TC 29/SC 10 - Assembly tools for screws and nuts, pliers and nippers
• Current Stage: 9093 - International Standard confirmed
• Start Date: 27-Jun-2024
• Completion Date: 14-Feb-2026

Overview

ISO 4228:1986 - Spanners and wrenches - Spline drive ends for power socket wrenches - is an international standard that defines the geometry and dimensional requirements for involute spline drive ends used on power-driven socket wrenches. It covers both male and female end dimensions, giving manufacturers and users the measurements needed to ensure correct fit, engagement and interchangeability of spline-drive sockets and driving tools.

Key topics and technical requirements

• Involute spline geometry: Defines spline form used for transmitting torque in power socket wrenches.
• Male and female dimensions: Complete dimensional tables for nominal sizes (examples shown: sizes 4, 5, 5A and 6) including pitch diameter, major/minor diameters, tooth thickness, fillet radii and effective tooth dimensions.
• Pitch definition: The pitch p/ps notation in the tables specifies spline dimensions - the first value is the diametral pitch, the second is the stub pitch, which denotes (as a fractional part of an inch) the basic radial length of engagement above and below the pitch circle.
• Module (m): Expresses the number of units of pitch diameter per tooth in millimetres.
• Fit and engagement: Male ends must be made to fit female ends exactly to ensure correct length of engagement. Special care is required so that any locking device is not subjected to torsional or axial load during use.
• Tabulated data: Standard includes dimensions in both millimetres and inches for manufacturing and inspection use.

Practical applications

• Ensures interchangeability of power socket wrenches and sockets across manufacturers.
• Used in design and production of power-driven socket tools, impact sockets, and accessory drives for assembly lines.
• Critical for automotive, heavy equipment maintenance, manufacturing assembly, and industrial maintenance where reliable high-torque connections are required.
• Supports quality control and inspection processes by providing reference dimensions for tolerance checks and supplier qualification.

Who should use ISO 4228

• Hand and power tool manufacturers and designers
• Socket and accessory producers
• Quality assurance and metrology laboratories
• Procurement/specification engineers and maintenance managers specifying tool interfaces
• Standards committees and technical writers documenting tool interfaces

Related standards

• Produced under ISO/TC 29 (Small tools); users should consult other ISO standards on hand and power tools for complementary requirements and the latest editions of referenced documents.

Keywords: ISO 4228, spline drive ends, power socket wrenches, involute splines, diametral pitch, stub pitch, module, socket dimensions, spanners and wrenches, tool interchangeability.

Standards Content (Sample)

International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME~~YHAPOLWAR OPrAHM3AUMfl no CTAH~APTL13A~ML1.ORGANISATION INTERNATIONALE DE NORMALISATION
- Spline drive ends for power
Spanners and wrenches
socket wrenches
Entrahement h cannelures pour douifles machines
Outils de mancwvre pour vis et hrous -
First edition - 1986-10-01
Ref. No. ISO 4228-1986 (IE)
UDC 621383.16
w
-
Descriptors : Pools, assembly tools, hand tools, wrenches, socket wrenches, dimensions.
Price based on 3 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bodies). The work sf preparing International
Standards is normally carried out through ISO technical committees. Esch member
body interested in a subject for which a technical committee Dias been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take patt in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council. They are approved in accordance with ISO procedures requiring at
least 75 % approval by the member bodies voting.
International Standard ISO 4228 was prepared by Technical Committee ISO/TC 29,
.-
Small tools.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
0 International Organkation Per Standardization, 1986 0
Printed in Switzerland
INTERNATIONAL STANDARD ISO4228=1986(E)
Spline drive ends for power
Spanners a’nd wrenches -
socket wrenches
1 Scope and field of application
This International Standard defines certain dimensions for the involute splines used for driving power socket wrenches, and for the
ends of these sockets.
lt covers both the male end dimensions, and the female end dimensions.
The pitch pl.t)s as given in the tables defines the spline dimensions. The first number, ,o, is the diametral pitch; the second number, ps,
is the stub pitch and denotes, as the fractional patt of an inch, the basic radial length of engagement, both above and below the pitch
circle- The module, m, denotes the number of units of pitch diameter per to
...

Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION~MEIK~YHAPOflHAR OPTAHM3AlUlR fl0 CTAH~APTM3ALWlM.ORGANISATlON INTERNATIONALE DE NORMALISATION
Outils de manoeuvre pour vis et écrous - Entraînement à
cannelures pour douilles machines
Spanners and wrenches - Spline drive ends for power socket wrenches
Première edition - 1986-10-01
CDU 621383.16 Réf. no : ISO 42284986 (F)
: outil, outil d’assemblage, outil à main, clé de serrage, douille de serrage pour boulonnerie, dimension.
Descripteurs
Prix basé sur 3 pages
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéresse par une étude a le droit de faire partie du comité technique
créé a cet effet. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO. Les Normes internationales sont approuvées confor-
mément aux procédures de I’ISO qui requiérent l’approbation de 75 % au moins des
comites membres votants.
La Norme internationale ISO 4228 a été élaborée par le comité technique ISOITC 29,
Petit ou tiI/age .
L’attention des utilisateurs est attirée sur le fait que toutes les Normes internationales
sont de temps en temps soumises a révision et que toute référence faite à une autre
Norme internationale dans le présent document implique qu’il s’agit, sauf indication
contraire, de la dernière édition.
0 Organisation internationale de normalisation, 1986
Imprimé en Suisse
ISO 42284986 (F)
NORME INTERNATIONALE
Outils de manoeuvre pour vis et écrous - Entraînement à
cannelures pour douilles machines
1 Objet et domaine d’application
La présente Norme internationale définit certaines dimensions des cannelures à développante utilisées pour l’entraînement des
douilles machines, ainsi que les extrémités de ces douilles.
Elle traite, d’une part, des dimensions de l’entraînement mâle et, d’autre part, des dimensions de l’entraînement femelle.
Le pas p/.oS figurant dans les tableaux définit les dimensions des cannelures. Le premier nombre, p, est le «diametraI pitch)); le
second, pS, est le ((stub pitch)) qui, pris comme fraction d’inch, represente la longueur d’engagement radiale de base, à la fois
au-dessus et au-dessous du cercle primitif. Le module m est le nombre d’unités de diamètre primitif par dent, en millimètres.
2 Dimensions
2.1 Entraînement mâle
2.1.1 Extrémité de la douill
...