SIST ISO 1122-1:1998/TC 1:2002

Vocabulary of gear terms - Part 1: Definitions related to geometry - TECHNICAL CORRIGENDUM 1

Vocabulaire des engrenages — Partie 1: Définitions géométriques — Rectificatif technique 1

Slovar na področju zobniških prenosnikov - 1. del: Geometrijske definicije - Tehnični popravek 1

General Information

• Status: Published
• Publication Date: 30-Jun-2002
• ICS: 01.040.21 - Mechanical systems and components for general use (Vocabularies)
• ICS: 21.200 - Gears
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2002
• Due Date: 01-Jul-2002
• Completion Date: 01-Jul-2002
• Ref Project: ISO 1122-1:1998/Cor 1:1999 - Vocabulary of gear terms - Part 1: Definitions related to geometry - Technical Corrigendum 1

Relations

• Corrects: SIST ISO 1122-1:2015 - Vocabulary of gear terms - Part 1: Definitions related to geometry
• Effective Date: 06-Jun-2022
• Child: ISO 1122-1:1998 - Vocabulary of gear terms - Part 1: Definitions related to geometry
• Effective Date: 14-Aug-2008
• Child: SIST ISO 1122-1:2015 - Vocabulary of gear terms - Part 1: Definitions related to geometry
• Effective Date: 15-Apr-2008

Overview

SIST ISO 1122-1:1998/TC 1:2002 is a technical corrigendum to the international standard ISO 1122-1:1998, issued by the International Organization for Standardization (ISO). This document updates and clarifies definitions related to the geometry of gears as part of the broader vocabulary of gear terms. Developed by ISO Technical Committee ISO/TC 60, Subcommittee SC 1, which specializes in gears nomenclature and worm gearing, this corrigendum ensures precise and consistent terminology for gear geometry used in engineering, manufacturing, and quality assurance.

The corrigendum primarily revises notes associated with the profile shift definition for external and internal gears to improve clarity and applicability.

Key Topics

• Profile Shift Clarification
  The corrigendum modifies notes for the profile shift concept:

  • For external gears, a positive profile shift means the datum line of the basic rack is displaced away from the gear axis.
  • For internal gears, a positive profile shift means the datum line of the basic rack is displaced towards the gear axis.
  • In both cases, a positive profile shift results in an increase in nominal tooth thickness.

• Internal Gear Tooth Profiles
  Clarifies that for internal gears, tooth profiles are considered in the context of the tooth spaces rather than the teeth themselves, providing better alignment with practical gear design and measurement.

• Terminology Standardization
  Reinforces a standardized vocabulary for defining gear geometry to support clear communication across global industries.

Applications

Understanding and applying SIST ISO 1122-1:1998/TC 1:2002 is critical for:

• Gear Design and Manufacturing
  Accurate definitions of profile shift and tooth profile geometry guide engineers in designing gears with precise mechanical properties and fit.

• Quality Control and Inspection
  Standard terms allow quality inspectors to uniformly interpret gear geometry tolerances and ensure compliance with design specifications.

• Technical Documentation
  Machinery and automotive manufacturers benefit from using ISO-compliant terminology in manuals, blueprints, and technical standards for gears.

• Education and Training
  Provides clear, authoritative terminology for training future engineers and technicians in gear technology.

Related Standards

• ISO 1122 Series
  The broader series addresses vocabulary related to gears, including definitions beyond geometry such as materials and testing methods.

• ISO 6336
  Focuses on calculation of load capacity of cylindrical gears, complementing geometric definitions with performance criteria.

• ISO 1328
  Deals with accuracy and quality grades for cylindrical gears, relevant for ensuring the practical application of definitional geometry.

• ISO 21771
  Applies to worm gears and offers terminology and nomenclature that align with the SC 1 subcommittee’s scope.

Summary

SIST ISO 1122-1:1998/TC 1:2002 updates the foundational vocabulary for gear geometry to ensure uniform understanding of key terms such as profile shift for both external and internal gears. It supports industries in designing, manufacturing, and evaluating gear systems with internationally recognized terminology. Adopting this corrigendum contributes to better product quality, clearer communication, and enhanced interoperability in mechanical engineering fields worldwide.

Key SEO Keywords: ISO 1122-1 corrigendum, gear terminology, gear geometry definitions, profile shift gears, internal gear profile, external gear profile, ISO gear standards, gear design vocabulary, technical corrigendum ISO, gear manufacturing standards.

Standards Content (Sample)

INTERNATIONAL STANDARD ISO 1122-1:1998
TECHNICAL CORRIGENDUM 1
NORME INTERNATIONALE ISO 1122-1:1998
RECTIFICATIF TECHNIQUE 1
Published/Publié 1999-11-01
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION � МЕЖДУНАРОДНАЯОРГАНИЗАЦИЯПОСТАНДАРТИЗАЦИИ � ORGANISATION INTERNATIONALE DE NORMALISATION
Vocabulary of gear terms —
Part 1:
Definitions related to geometry
TECHNICAL CORRIGENDUM 1
Vocabulaire des engrenages —
Partie 1:
Définitions géométriques
RECTIFICATIF TECHNIQUE 1
Technical Corrigendum 1 to International Standard ISO 1122-1:1998 was prepared by Technical Committee
ISO/TC 60, Gears, Subcommittee SC 1, Nomenclature and wormgearing.
Le Rectificatif technique1àlaNorme internationale ISO 1122-1:1998 a été élaboré par le comité technique
ISO/TC 60, Engrenages, sous-comité SC 1, Nomenclature et engrenages à vis.
o
ICS 01.040.21; 21.200 Ref. No./Réf. n ISO 1122-1:1998/Cor.1:1999(E/F)
© ISO 1999 – All rights reserved/Tous droits réservés
Printed in Switzerland/Imprimé en Suisse

ISO 1122-1:1998/Cor.1:1999(E/F)
Vocabulary of gear terms — Vocabulaire des engrenages —
Part 1: Partie 1:
Definiti
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Vocabulary of gear terms — Part 1: Definitions related to geometry -
TECHNICAL CORRIGENDUM 121.200GonilaGears01.040.21Mehanski sistemi in deli za splošno rabo (Slovarji)Mechanical systems and com
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