This wedge is a wear component that locks the rasp bar into its seat on the threshing rotor. It sits between the rasp bar and the rotor bar, preventing the bar from shifting or lifting under load during threshing. A worn or deformed wedge allows the rasp bar to loosen, which can cause impact damage to the threshing assembly and reduce separation efficiency. This part is machined to the original profile so that it seats fully against the bar without requiring additional shimming. On installation, ensure the wedge is driven fully home and that the retaining bolt is torqued to specification.