A cutterhead is attached to the machine; this is conceived and accurately designed both according to the specific geology of the ground to be excavated and to the main machine specifications in such a way to obtain the best possible advance rates with minimal cutting tools replacements.

The excavation is performed by a telescopic boom revolving on a turret; the boom is equipped with the most suitable excavation system which must be selected in advance according to the geological conditions to be encountered during the drive: different systems include a simple mechanical backhoe excavator, in the presence
of soft soil or a point attack cutter boom with picks or teeth for medium hardness geology.