For selecting a pneumatic motor, what fraction of the available pressure is commonly used to determine motor size?

When selecting a pneumatic motor, it is a standard practice to use around two-thirds of the available pressure to determine the appropriate motor size. This fraction takes into account the need for a safety margin and allows for potential pressure drops in the system due to friction losses, regulation, and other factors. By using this guideline, engineers ensure that the motor operates efficiently without being overworked, thus enhancing its longevity and performance.

The two-thirds rule also facilitates a more accurate sizing process, ensuring that the motor has adequate power to handle variations in load while maintaining effective system operation. This strategy is designed to balance performance while also accounting for the practicalities of maintaining consistent pneumatic pressure.