The screw conveyor is used for the transportation of granular and powdered materials horizontally. It is driven by a directly connected gear motor. In case of a jam, jam control mechanism is activated and the operator is informed. The screw conveyor is also equipped with a speed guard at the end of the shaft and in case of a damage on the shaft, the operator is alerted before further damage occurs. The top covers are equipped with hinges and the bottom discharge doors makes it easy to clean the inside of the machine. Screw conveyors used in tempering section are made of stainless steel.