This double gear drives the metering and conveying components within a corn header attachment. It transfers torque from the drive input to the downstream sprockets that control the snapping-roll and gathering-chain assemblies. The two gear stages, with differing tooth counts, allow a speed reduction between the input and output shafts. A worn or damaged gear produces irregular drive speed, leading to uneven crop intake and potential plugging of the header. This original part is machined to the same tooth profile and bore tolerance as the factory assembly, so no shimming or modification is required during installation.