ISO 21771:2007

Gears — Cylindrical involute gears and gear pairs — Concepts and geometry

Publication date:   Aug 28, 2007

95.99 Withdrawal of Standard   Oct 24, 2024

General information

95.99 Withdrawal of Standard   Oct 24, 2024

ISO

ISO/TC 60/SC 1 Nomenclature and wormgearing

International Standard

21.200   Gears

Buying

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Scope

ISO 21771:2007 specifies the geometric concepts and parameters for cylindrical gears with involute helicoid tooth flanks. Flank modifications are included. It also covers the concepts and parameters for cylindrical gear pairs with parallel axes and a constant gear ratio, which consist of cylindrical gears according to it. Gear and mating gear in these gear pairs have the same basic rack tooth profile.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO/TR 4467:1982

NOW

WITHDRAWN
ISO 21771:2007
95.99 Withdrawal of Standard
Oct 24, 2024

REVISED BY

PUBLISHED
ISO 21771-1:2024