ISO 21771-1:2024

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

Publication date: 24 tet 2024

General information

Current stage: 90.92 Effective date: 24 qer 2025

Originator: ISO

Owner: ISO/TC 60/SC 1

Type: International Standard

ICS: 21.200

Gjuha: anglisht frëngjisht

Buying

Statusi: Publikuar

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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WITHDRAWN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
90.92 Standard to be revised
24 qer 2025

CORRIGENDA / AMENDMENTS

ABANDON
ISO 21771-1:2024/CD Amd 1

REVISED BY

IN_DEVELOPMENT
ISO/CD 21771-1