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ISO 19347:2015

Synchronous belt drives — Imperial pitch trapezoidal profile system — Belts and pulleys

Sep 29, 2015

General information

90.20     Apr 15, 2026

ISO

ISO/TC 41/SC 4

International Standard

21.220.10  

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Scope

ISO 19347:2015 specifies the principal characteristics of synchronous endless belts and pulleys for use in synchronous endless belt drives[1] for mechanical power transmission and where positive indexing or synchronization is required.
The principal characteristics includes the following:
a) belt nominal tooth dimensions;
b) belt length and width dimensions and tolerances;
c) belt length-measurement specifications;
d) pulley grooves dimensions and tolerances;
e) pulley dimensions and tolerances;
f) pulley quality specification.

[1] These drives have been known under various names in the past, for example: timing belt drives, positive belt drives, gear belt drives.

Life cycle

NOW

PUBLISHED
ISO 19347:2015
90.20 Standard under periodical review
Apr 15, 2026

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