A spin-dryer includes an external drum, an internal drum and a spinning unit. The external drum includes a containing chamber. The internal drum is rotationally inserted in the containing chamber. The internal drum includes a spinning chamber, apertures in communication with the spinning chamber, and a lower axle rotationally inserted in the external drum. The spinning unit includes a motor inserted in the external drum, a driver gear operatively connected to the motor, and a follower gear connected to the lower axle and engaged with the driver gear.