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ISO 21771-1:2024

Cylindrical involute gears and gear pairs — Part 1: Concepts and geometry

Oct 24, 2024

General information

60.60     Oct 24, 2024

ISO

ISO/TC 60/SC 1

International Standard

21.200  

English  

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Published

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Scope

This document specifies the geometric concepts and parameters for cylindrical gears with involute helicoid tooth flanks. Flank modifications are included. The formulae in this document apply to all pressure angles.
It also covers the concepts and parameters for involute cylindrical gear pairs with parallel or crossed axes, and a constant gear ratio. Gear and mating gear in these gear pairs have the same basic rack tooth profile.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 21771:2007

NOW

PUBLISHED
ISO 21771-1:2024
60.60 Standard published
Oct 24, 2024

CORRIGENDA / AMENDMENTS

IN_DEVELOPMENT
ISO 21771-1:2024/CD Amd 1.2