This gear transmits drive within the corn-header drivetrain, meshing with a mating gear to rotate the gathering-chain or snapping-roller assembly. It has 24 teeth and is manufactured by Capello as an original component, ensuring the tooth profile and pitch match the original design so no backlash adjustment is needed during installation. A worn gear produces a characteristic whine or chatter as the tooth flanks lose their correct engagement, which can lead to uneven crop feed and increased load on the upstream drive shaft.