Tubular Screw Conveyors and Feeders are manufactured from carbon steel with suitable surface finishing. They consist of a tubular trough equipped with at least one inlet and outlet spout, a welded flange at each tube end, helicoid screw flighting welded on a Centre pipe with a coupling bush at each end, two end bearing assemblies complete with self-adjusting shaft seal, a number of intermediate hanger bearings depending on the overall length of the screw conveyor.