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
94.24 BHD

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
BH GSO 150-2:2015
GSO 150-2:2013 
Bahraini Standard
Expiration dates for food products - Part 2 : Voluntary expiration dates
BH GSO 2055-1:2016
GSO 2055-1:2015 
Bahraini Technical Regulation
HALAL FOOD - Part 1 : General Requirements
GSO 2055-1:2015
 
Gulf Technical Regulation
HALAL FOOD - Part 1 : General Requirements

Recently Published

ISO 14617-1:2025
 
International Standard
Graphical symbols for diagrams — Part 1: General rules
ISO/IEC TS 18661-4:2025
 
International Standard
Programming languages, their environments, and system software interfaces — Floating-point extensions for C — Part 4: Supplementary functions
ISO/IEC TS 18661-5:2025
 
International Standard
Programming languages, their environments, and system software interfaces — Floating-point extensions for C — Part 5: Supplementary attributes
ISO 8871-5:2025
 
International Standard
Elastomeric parts for parenterals and for devices for pharmaceutical use — Part 5: Functional requirements and testing