The screw conveyors are used for carrying cereals, granular and flour products on horizontal or slightly inclined tracks (serie CC and CT) and vertical tracks (only serie CT). They can be split into modular elements. Galvanized case with semi-polygonal bottom on serie CC and galvanized tubolar case on CT serie both with a minimum thickness of 2 mm and constant pitch spiral equal to diameter. Shaft fitted at ends on roller bearings and cast iron supports and, on serie CC also in the middle of each case. The machine is driven by motor and belt relay or, for low rotation speeds, by geared motor direct assembled on shaft.