A distribution machine having two distributor discs (1, 2) is proposed, which are driven in rotation by a drive train (4, 7-13) that is connectable to a PTO shaft of a traction engine or a tractor. The drive train comprises a central input shaft (7) which drives a transverse shaft (11) that is used to drive a respective distributor disc, via a central gear (8), wherein one of the distributor discs can be rotated at a different speed from another distributor disc, at a variable output speed, by means of a reduction gear (100) arranged downstream of the central gear. The reduction gear has an actuator (200, 400) for changing its output speed. According to the invention, the reduction gear is configured as a mechanical coaxial gear, the input shaft (101) of which is connected to the transverse shaft and the output shaft (102) of which is arranged coaxially with the transverse shaft, wherein the reduction ratio of the coaxial gear is variable by means of the actuator between a normal position, in which the input speed of the input shaft corresponds to the output speed of the output shaft, and at least one reduction position, in which the input speed of the input shaft is not equal to the output speed of the output shaft.
