1 Scope
This document specifies the principal characteristics of metric pitch curvilinear
synchronous endless belts and pulleys in G, H, R, and S profile systems for use in
synchronous belt drives (also known in the past as timing belt drives, positive belt
drives, gear belt drives) for mechanical power transmission and where positive indexing
or synchronization can be required.
The principal belt and pulley characteristics include the following:
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a) nominal belt tooth dimensions;
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b) belt tooth pitch spacing;
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c) belt length and width dimensions and tolerances;
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d) belt length measurement specifications;
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e) pulley groove dimensions and tolerances;
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f) pulley diameter and width dimensions and tolerances;
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g) pulley quality specification.