Abstract: A rotary disaggregator for an operating machine, such as an excavator, comprising a support structure, a single rotating drum comprising a plurality of teeth and a drive unit for the rotating drum. The support structure includes a connection plate which defines a connection plane with respect to the operating machine and comprises a lateral arm, on which the rotating drum is rotatably supported. The rotation axis (X) of the conical drum is inclined with respect to the connection plane in such a manner that a generatrix of the rotating drum is essentially parallel with the connection plane.