ISO/PRF 21771-1

This draft is in the approval phase.

Will replace ISO 21771:2007

Abstract

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.

General information

Status
: Under development

Stage
: Final text received or FDIS registered for formal approval [50.00]
Edition
: 1
Technical Committee :
ISO/TC 60/SC 1

ICS :
21.200
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