Abstract: A forage or picking harvester unit includes a cylindrical cutter followed by an impeller fan with a crushing device in the path between the cutter and the fan. In the cylindrical cutter, the cutting wheel shaft is arranged perpendicularly relative to the shaft of the impeller fan. The crushing device is formed of crushing rollers with the roller axes extending parallel to the cutting wheel shaft. The crushing rollers are positioned in the path of the material flowing from the cylindrical cutter into the impeller fan. The circumferential surfaces of the crushing rollers are fluted in the direction parallel to the roller axes. The fluted surfaces form alternating teeth and recesses so that the circumferential surfaces of the crushing rollers can intermesh.