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ISO 21342:2019

Synchronous belt drives — Automotive belts and pulleys

Standard Details

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.

General Information

Status : Published
Standard Type: Main
Document No: ISO 21342:2019
Document Year: 2019
Pages: 20
Edition: 1
  • ICS:
  • 21.220.10 Belt drives and their components
  • 43.060.10 Engine block and internal components

Life Cycle

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ISO 21342:2019
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