90.20 Standard under periodical review Apr 15, 2024
ISO
ISO/TC 41/SC 4 Synchronous belt drives
International Standard
21.220.10 Belt drives and their components | 43.060.10 Engine block and internal components
This document specifies the characteristics of synchronous endless belts and their related pulleys for use in automotive applications such as engine camshaft drives.
The characteristics include:
— belt pitch spacing;
— belt nominal tooth dimensions;
— belt width and width tolerance;
— belt pitch length and pitch length tolerance;
— pulley groove dimensions and tolerances;
— pulley tolerances and quality specifications.
Test methods for measuring belt pitch length and lateral runout are also included.
PUBLISHED
ISO 21342:2019
90.20
Standard under periodical review
Apr 15, 2024