ISO 21771-1:2024

International Standard   Current Edition · Approved on 24 October 2024

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

ISO 21771-1:2024 Files

English 159 Pages
Current Edition
278.44 USD

ISO 21771-1:2024 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.

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