Screw Conveyor an overview | ScienceDirect Topics
Portable screw conveyors are used extensively for transferring grain into and out of storage. Diameters typically range from 6 to 12 in., with maximum capacities near 5500 ft 3 /h. Portable screw conveyors range in length from around 6 to 100 ft. Moving grain with this type of screw conveyor at angles exceeding 45° is considered impractical.