### Screw Conveyor Sizing : Things to Know - EnSight Solutions

Oct 29, 2018· The capacity of a screw conveyor is measured in cubic feet per hour. When calculating screw conveyor sizing, manufacturers look at the desired flow rate, the diameter of the screw (the part where the blades extend), the outside diameter of the center pipe, the pitch of the screw (the distance between each blade on the screw), and the trough ...