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
OMR
106.83
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
OS GSO 150-2:2013
GSO 150-2:2013
Omani Standard
Expiration dates for food products - Part 2 :
Voluntary expiration dates
OS GSO 9:2022
GSO 9:2022
Omani Standard
Labeling of prepackaged food stuffs
GSO 9:2022
Gulf Technical Regulation
Labeling of prepackaged food stuffs
Recently Published
ISO 6599-1:2026
International Standard
Packaging — Conditioning for testing — Part 1: Paper sacks
ISO 8783:2026
International Standard
Alpine skis — Guidelines and requirements for conducting slope performance tests
ISO/IEC 23093-3:2026
International Standard
Information technology — Internet of media things — Part 3: Media data formats and application programming interface (API)
ISO 17191:2026
International Standard
Urine-absorbing products for incontinence — Measurement of airborne respirable polyacrylate superabsorbent materials — Determination of dust in collection cassettes by sodium atomic absorption spectrometry