This gear transmits drive within the grain tank unloading system of a harvesting machine. It meshes with a mating gear to transfer rotational motion from the drive shaft to the auger or conveyor mechanism. A worn or damaged gear causes slipping or jamming in the unloading system, leading to material backup or complete drive failure. This original component is machined to the same tooth profile and bore tolerance as the factory-installed part, ensuring correct backlash and smooth engagement without requiring shimming or modification.