ISO 1122-1-1998 cor2-2009 PDF

Full title and description

ISO 1122-1:1998/Cor 2:2009 — Vocabulary of gear terms — Part 1: Definitions related to geometry — Technical Corrigendum 2. This is a technical corrigendum published to correct and clarify elements of the Part 1 (geometry) vocabulary of gears contained in ISO 1122-1:1998.

Abstract

ISO 1122-1:1998 defines standard, internationally agreed terminology for geometrical features of gears (cylindrical gears and related items). Corrigendum 2 (2009) issues editorial and technical corrections to the 1998 edition (edition 2) to ensure definitions, figure references and short-form notations are accurate and unambiguous for use in design, manufacturing and standards work.

General information

• Status: Published (Technical corrigendum to ISO 1122-1:1998).
• Publication date: Corrigendum published June 2009 (effective date commonly listed as 2 June 2009). Original standard published August 1998.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 21.200 (Gears); 01.040.21 (Mechanical systems and components for general use — Vocabularies).
• Edition / version: Edition 2 (ISO 1122-1:1998) with Technical Corrigendum 1 (1999) and Technical Corrigendum 2 (2009).
• Number of pages: Corrigendum: 2 pages. Main document (ISO 1122-1:1998, ed.2): 68 pages.

Scope

This corrigendum amends ISO 1122-1:1998, which sets out standard definitions of geometrical terms used in gears (tooth geometry, pitches, profiles, helix and pressure angles, addendum/dedendum, profile shift, flank terminology, etc.). The corrigendum corrects editorial errors, figure or reference mistakes and small technical inconsistencies so that the vocabulary and cross-references in Part 1 are clear and consistent for international use.

Key topics and requirements

• Standardized definitions for gear geometry terms (module, pitch, pressure angle, helix angle, addendum, dedendum, tooth thickness, profile shift, flank, root, tip, etc.).
• Corrected figure labels, clause cross-references and minor formula/notation fixes from the 1998 edition.
• Clarifications to language and translations where necessary to preserve defined meanings across languages.
• Consistency requirements for use of the vocabulary in design, documentation and standards referencing gear geometry.

Typical use and users

The corrigendum is used by standards committees, gear designers and engineers, manufacturers, technical authors and translators who rely on precise, consistent definitions of gear geometry. It is also referenced by quality and procurement personnel, educators and researchers when interpreting or applying ISO 1122-1:1998.

Related standards

Other parts of the ISO 1122 series (for example ISO 1122-2:1999 for worm gear geometry), and related gear standards such as ISO 1328 (cylindrical gears — flank tolerance and related definitions), ISO 53 (standard basic rack tooth profile) and other ISO/TC 60 publications on gear terminology and tolerancing.

Keywords

gear vocabulary, gear terminology, gear geometry, ISO 1122-1, corrigendum, module, pitch, helix angle, pressure angle, addendum, dedendum, profile shift, gear definitions, ISO/TC 60

FAQ

Q: What is this standard?

A: This entry is the Technical Corrigendum 2 (2009) to ISO 1122-1:1998 — a short published correction document that amends and clarifies the vocabulary of gear terms (Part 1: geometry).

Q: What does it cover?

A: It covers editorial and small technical corrections to the geometrical definitions and related figures/cross-references in ISO 1122-1:1998 so that the standard vocabulary used for gear geometry is accurate and unambiguous.

Q: Who typically uses it?

A: Gear designers, mechanical engineers, manufacturers, standards bodies, technical translators, educators and quality/procurement staff who reference ISO gear terminology use the corrigendum together with the main ISO 1122-1 document.

Q: Is it current or superseded?

A: The corrigendum is a published amendment to the 1998 edition. The underlying ISO 1122-1:1998 (edition 2) together with its corrigenda remains the authoritative published text unless later superseded by a new edition published by ISO. Users should check the official ISO catalogue or their national standards body for the most current status before relying on the document for regulatory or contractual purposes.

Q: Is it part of a series?

A: Yes — ISO 1122 is a multipart vocabulary series for gear terms. Part 1 covers geometrical definitions; Part 2 covers worm gear geometry. The series is maintained by ISO/TC 60 (gears and transmissions) and its relevant subcommittees.

Q: What are the key keywords?

A: Gear vocabulary, gear geometry, terminology, module, pitch, helix angle, pressure angle, addendum, dedendum, profile shift, ISO 1122-1, corrigendum.