Reduction unit particularly for actuating the screw feeders of mixing trucks and auxiliary elements

A reduction unit particularly for actuating screw feeders of mixing trucks and auxiliary elements, comprising a parallel shaft gear unit (2) which is associable with the power take-off of a tractor and is operatively connected to a reduction unit body (20). The parallel shaft gear unit (2) forms means for the connection of auxiliary elements and the reduction unit body (20) is associable with the screw feeders of a mixing truck. The reduction unit further comprises a clutch-type disengagement unit (21) between the parallel shaft gear unit (2) and the reduction unit body (20).