Synchronous belt drives. Pulleys Ingestion-build-260237 BS EN 61643-321 on Components

BS EN 61643-321 on Components for low-voltage surge protective devices is useful for:

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Synchronous belt drives. Pulleys Ingestion-build-260237 BS EN 61643-321 on Components1 Scope This International Standard specifies the principal characteristics of synchronous pulleys for use in synchronous endless belt drives for mechanical power transmission and where positive indexing or synchronization is required. NOTE These drives have been known under various names in the past, for example: timing belt drives, positive belt drives, gear belt drives. The principal characteristics include: a) tooth dimensions and tolerances; b)