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
null Pages
Current Edition
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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