ISO/DIS 21771-1.2

Cylindrical involute gears and gear pairs — Part 1: Concepts and geometry ISO/DIS 21771-1.2

General information

Current stage: 40.60 Close of voting Feb 16, 2024

Originator: ISO

Owner: ISO/TC 60/SC 1 Nomenclature and wormgearing

Type: International Standard

ICS: 21.200 Gears

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

PUBLISHED
ISO 21771:2007

NOW

IN_DEVELOPMENT
ISO/DIS 21771-1.2
40.60 Close of voting
Feb 16, 2024