TUNNEL.DRM machines are drum washing plants particularly suitable for the continuous and random treatment of small and medium-sized pieces, such as screws, bolts and small metal pieces in general.

The material is moved forward by the slow rotation (at variable speed) of a cylinder, which contains a spiral at preset pace.

During the advancement motion, parts undergo cycles of treatment, spiral continuous and slow rotation allows the movement of the pieces and the consequent removal of grease or swarf and to drying them perfectly.

The loading operations can be either manual or automated through automatic loading devices.