Abstract: A centrifugal treatment machine for the mechanical treatment of workpieces in a treatment container having an essentially cylindrical casing which is stationary during operation and a base in the form of a plate or the like mounted coaxially to this and which rotates during operation, the circumferencial rim of base projecting towards the cylindrical casing to form a gap. In order to be able to gently discharge the workpieces treated in the treatment container without pivoting the container, the rotating base has at least one appropriately dimensioned opening which can be closed by means of a co-rotating closure. Furthermore, a receptacle is arranged beneath the base opening for collecting the workpieces and possibly also the treatment means discharged together with the workpieces out of the container.