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
274.73 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.
Best Sellers
GSO 150-2:2013
Gulf Standard
Expiration dates for food products - Part 2 :
Voluntary expiration dates
YSMO GSO 150-2:2020
GSO 150-2:2013
Yemeni Technical Regulation
Expiration dates for food products - Part 2 :
Voluntary expiration dates
YSMO GSO 2055-1:2020
GSO 2055-1:2015
Yemeni Standard
HALAL FOOD - Part 1 : General Requirements
GSO 2055-1:2015
Gulf Technical Regulation
HALAL FOOD - Part 1 : General Requirements
Recently Published
ISO 3953:2025
International Standard
Metallic powders — Determination of tap density
ISO 24108-1:2025
International Standard
Grid square statistics and their applications — Part 1: Fundamental principle of grid square statistics
ISO 23333:2025
International Standard
Natural gas — Upstream area — Requirements and testing of slick water
ISO 1008:2025
International Standard
Photography — Unprocessed photographic papers — Sheet dimensions