ISO 54:1996

Cylindrical gears for general engineering and for heavy engineering — Modules

Specifies the values of normal modules for straight and helical gears for general engineering and for heavy engineering. Replaces the first edition.

Engrenages cylindriques de mécanique générale et de grosse mécanique — Modules

La présente Norme internationale prescrit les valeurs des modules réels pour les engrenages cylindriques à denture droite et les engrenages cylindriques à denture hélicoïdale de mécanique générale et de grosse mécanique.

Valjasti zobniki za splošno in težko strojegradnjo - Moduli

General Information

• Status: Published
• Publication Date: 25-Dec-1996
• ICS: 21.200 - Gears
• Technical Committee: ISO/TC 60 - Gears
• Drafting Committee: ISO/TC 60 - Gears
• Current Stage: 9093 - International Standard confirmed
• Start Date: 21-Jul-2022
• Completion Date: 14-Feb-2026
• Ref Project: SIST ISO 54:1998 - Cylindrical gears for general engineering and for heavy engineering -- Modules

Relations

• Revises: ISO 54:1977 - Cylindrical gears for general engineering and for heavy engineering — Modules and diametral pitches
• Effective Date: 15-Apr-2008

Overview

ISO 54:1996 is an international standard developed by the International Organization for Standardization (ISO) that specifies the normal module values for cylindrical gears used in general engineering and heavy engineering applications. This standard provides definitions and standardized module sizes for both straight-toothed and helical cylindrical gears. As a technical revision, ISO 54:1996 replaces the first edition published in 1977, ensuring updated guidance aligned with modern engineering practices.

This standard helps engineers and manufacturers ensure compatibility, precision, and high-quality performance when designing and producing cylindrical gears, which are critical mechanical components in many industrial machines and heavy equipment.

Key Topics

• Scope: Defines normal module values specifically for straight and helical cylindrical gears used in both general and heavy engineering sectors.
• Module Definition: The module (m) is the quotient of the pitch diameter (in millimeters) divided by the number of teeth or equivalently, the pitch divided by the number of teeth, providing a fundamental dimension for gear design.
• Module Series: ISO 54:1996 presents two series of preferred module values:
  • Series I (Recommended modules for most applications): 1, 1.125, 1.25, 1.375, 1.5, 1.75, 2, 2.25, 2.5, 2.75, 3, 3.5, 4, 4.5, 5, 5.5, 6, 7, 8, 10, 12, 16, 20, 25, 32
  • Series II (Less preferred, modules such as 9, 63 are generally avoided)
• Scope of Application: Relevant to both general engineering-which covers the manufacture of mechanical components for a wide range of industries-and heavy engineering, which involves large-scale, high-load applications such as heavy machinery and industrial equipment.
• Reference to Related ISO Standards: Includes linkage to ISO 53 for gear rack reference and plotting guidelines.

Applications

ISO 54:1996 plays a vital role in industries where precision gearing is essential for functionality and reliability, such as:

• Mechanical Engineering: Design and manufacturing of gearboxes, transmission systems, and machine tools.
• Heavy Engineering: Large machinery in mining, construction, and agricultural sectors requiring durable and reliable gear components able to handle substantial loads.
• Automotive and Aerospace: Ensures standardized gear sizes that facilitate interchangeability, reduce manufacturing complexity, and maintain quality.
• Industrial Equipment: Used to design gears for rollers, conveyors, presses, and other equipment where cylindrical gears are fundamental for motion transfer.
• Gear Manufacturing: Helps gear producers maintain consistency and meet international quality expectations by adhering to standardized module dimensions.

Adopting ISO 54 modules allows manufacturers and engineers to optimize gear performance, improve interchangeability, and reduce design errors caused by incompatible gearing dimensions.

Related Standards

• ISO 53 - Cylindrical gears for general and heavy engineering - Reference rack and testing methods - Provides the definitions and reference points for measurements related to gear and rack profiles.
• ISO/TC 60 - Technical Committee that oversees gear standards ensuring compatibility of related gear manufacturing and inspection standards.
• Other ISO standards related to gear quality, geometry, and testing methods assist in comprehensive gear design and quality assurance frameworks.

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Keywords: ISO 54:1996, cylindrical gears, gear modules, straight gears, helical gears, general engineering, heavy engineering, gear standard, gear design, gear manufacturing, gear module sizes, ISO gear standards, industrial gears, mechanical engineering gears, heavy machinery gears

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-1998
Valjasti zobniki za splošno in težko strojegradnjo - Moduli
Cylindrical gears for general engineering and for heavy engineering -- Modules
Engrenages cylindriques de mécanique générale et de grosse mécanique -- Modules
Ta slovenski standard je istoveten z: ISO 54:1996
ICS:
21.200 Gonila Gears
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

IS0
INTERNATIONAL
STANDARD
Second edition
1996-12-15
Cylindrical gears for general engineering
and for heavy engineering - Modules
Engrenages cylindriques de mkcanique g&Wale et de grosse
mkanique - Modules
Reference number
IS0 54: 1996(E)
0 IS0
IS0 54:1996(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0
member bodies). The work of preparing International Standards is normally carried out through IS0 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. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
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 IS0 54 was prepared by Technical Committee ISO/TC 60, Gears.
This second edition cancels and replaces the first edition (IS0 54
...

IS0
INTERNATIONAL
STANDARD
Second edition
1996-12-15
Cylindrical gears for general engineering
and for heavy engineering - Modules
Engrenages cylindriques de mkcanique g&Wale et de grosse
mkanique - Modules
Reference number
IS0 54: 1996(E)
0 IS0
IS0 54:1996(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0
member bodies). The work of preparing International Standards is normally carried out through IS0 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. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
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 IS0 54 was prepared by Technical Committee ISO/TC 60, Gears.
This second edition cancels and replaces the first edition (IS0 54:1977), which has been technically revised.
0 IS0 1996
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 l CH-1211 Geneve 20 l Switzerland
Internet central @ isocsisoch
x.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii
-------------
...

ISO
NORME
INTERNATIONALE
Deuxième édition
1996-I 2-l 5
Engrenages cylindriques de mécanique
générale et de grosse mécanique -
Modules
Cylindrical gears for general engineering and for heavy engineering -
Modules
Numéro de référence
ISO 54: 1996(F)
ISO 54: 1996(F)
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 en général confiée aux
comités techniques de I’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 I’ISO participent également aux travaux. L’ISO collabore étroitement avec la Commission
électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
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 54 a été élaborée par le comité technique ISOTTC 60, Engrenages.
Cette deuxième édition annule et remplace la première édition (ISO 54:1977), dont elle constitue une révision
technique
0 ISO 1996
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 l CH-121 1 Genève 20 l Suisse
Internet central @ isocs.iso.ch
x.400 c=ch; a=40Onet; p=iso;
...

ISO
NORME
INTERNATIONALE
Deuxième édition
1996-I 2-l 5
Engrenages cylindriques de mécanique
générale et de grosse mécanique -
Modules
Cylindrical gears for general engineering and for heavy engineering -
Modules
Numéro de référence
ISO 54: 1996(F)
ISO 54: 1996(F)
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 en général confiée aux
comités techniques de I’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 I’ISO participent également aux travaux. L’ISO collabore étroitement avec la Commission
électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
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 54 a été élaborée par le comité technique ISOTTC 60, Engrenages.
Cette deuxième édition annule et remplace la première édition (ISO 54:1977), dont elle constitue une révision
technique
0 ISO 1996
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 l CH-121 1 Genève 20 l Suisse
Internet central @ isocs.iso.ch
x.400 c=ch; a=40Onet; p=iso;
...