This gear drives the chain conveyor that moves harvested grain through the material feeding unit. It sits at the conveyor drive sprocket location, where its teeth engage the chain links to transfer rotational motion from the drive shaft to the conveyor flighting. A worn gear causes chain slip, irregular conveyor speed, and material backup at the feed point. The manufacturer machines this replacement gear to match the original tooth profile and bore fit, so the chain tension and alignment remain within the assembly's design tolerances. On installation, verify the chain is correctly seated on all teeth before applying drive torque.