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
243.54 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
GSO 2055-1:2015
 
Gulf Technical Regulation
HALAL FOOD - Part 1 : General Requirements
YSMO GSO 150-1:2020
GSO 150-1:2013 
Yemeni Technical Regulation
Expiration dates for food products -Part 1 : Mandatory expiration dates

Recently Published

ISO 20236:2024
 
International Standard
Water quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion
ISO 21474-3:2024
 
International Standard
In vitro diagnostic medical devices — Multiplex molecular testing for nucleic acids — Part 3: Interpretation and reports
ISO 20957-1:2024
 
International Standard
Stationary training equipment — Part 1: General safety requirements and test methods
ISO 19397:2024
 
International Standard
Paints and varnishes — Determination of the film thickness of coatings using an ultrasonic gauge