Machine Design
For same pulley diameters, center distance, belt speed and belt and pulley materials,

Open belt drive transmits more power than crossed belt drive
Power transmission does not depend upon open and crossed types of constructions
Open and crossed belt drives transmit same power
Crossed belt drive transmits more power than open belt drive

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Machine Design
An open belt drive is used when

Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft

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