Screw conveyor or auger is a conveying device, which is used in the flour, feed and chemical industries, as well as at enterprises producing building materials. It is used to convey loose, bulk, small lumpy, dusty, powdery materials. In this case, horizontal transportation is usually up to 40 meters, and vertical - up to 30 meters. Screws are also used in mechanical engineering to convey drainage chips from machine tools.