How Do You Calculate The RPM Of A Conveyor Screw?

How Do You Calculate The RPM Of A Conveyor Screw? The actual screw conveyor speed is calculated by dividing the Selection Capacity by the capacity at 1-rpm. 60-rpm is the correct speed for a 16-inch diameter screw conveyor with cut and folded flights and short pitch for conveying and mixing 333 cubic feet per hour.