Screw conveyors of series TSSH-300 (d=300 mm) is intended for transportation of grain and similar characteristics of materials (feed, bran, etc.) in horizontal or inclined directions. Moving the product in an enclosed chute of the screw conveyor along the axis of the spiral. Screw conveyors are used in the organization of loading and unloading, as well as interoperational transport in the feed production, grain storage and grain cleaning facility.