This disc is part of the threshing mechanism and serves as the ejector or impeller component that directs the crop flow after it passes through the threshing cylinder. It is mounted on the rotor shaft and rotates with the threshing assembly to throw the separated material toward the subsequent cleaning or handling stages. A worn or damaged disc reduces throwing efficiency, leading to material buildup or uneven distribution inside the housing. The manufacturer machines this disc to match the original rotor interface, so the balance and clearance of the rotating assembly are maintained without additional shimming.