Screw feeders are used to move forward or backward the material lying in the trough depending upon direction of rotation when screw rotates. The trough in which material moves can be of U shaped, flared or tubular. Longer screw conveyors are outfitted with intermediate hanger bearings. U trough may have hinged or bolted covers. The feeder can be provided with multi feed point and discharge points as required by our clients. The screw conveyor can be horizontal, inclined or vertical.