ISO/PRF 21771-1

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

General information

Current stage: 50.20 Effective date: 13 gush 2024

Originator: ISO

Owner: ISO/TC 60/SC 1

Type: International Standard

ICS: 21.200

Gjuha: anglisht

Buying

Statusi: Draft

PDF - 24 423 Lekë

Paper - 24 423 Lekë

CD - 24 423 Lekë

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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 formulas 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

Revises
ISO 21771:2007

NOW

IN_DEVELOPMENT
ISO/PRF 21771-1
50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks
13 gush 2024

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