A threshing apparatus for an agricultural harvester has an axial threshing rotor driven by a power unit from its rearward end. The axial threshing rotor is connected at its forward end to a dynamic feed roll through a drive train including a drive connected to the axial threshing rotor and having an output shaft extending to a side of the dynamic feed roll where it is connected by either a gear set or a pulley drive.

Apparatuses and methods of feed accelerators of agricultural harvesters include one or more convertible sections that are convertible between two or more types of agitator assemblies. The feed accelerators may include a cylindrical body that may form one or more facets, and the feed accelerators may include an exterior wall and a plurality of paddles distributed along the exterior wall. The plurality of paddles may be arranged in a plurality of rows. The agitator assemblies may include a first type that includes an agitator having sidewalls that for a geometrical shape, such as a chevron that extends from the exterior wall. A second type of agitator may include one or more paddles that may align with one or more rows formed on the exterior wall.

Apparatuses and methods of feed accelerators of agricultural harvesters include one or more convertible sections that are convertible between two or more types of agitator assemblies. The feed accelerators may include a cylindrical body that may form one or more facets, and the feed accelerators may include an exterior wall and a plurality of paddles distributed along the exterior wall. The plurality of paddles may be arranged in a plurality of rows. The agitator assemblies may include a first type that includes an agitator having sidewalls that for a geometrical shape, such as a chevron that extends from the exterior wall. A second type of agitator may include one or more paddles that may align with one or more rows formed on the exterior wall.