When the dimensions of the tunnel being dug do not make the use of a special
machine with gathering system essential, the job can be done using an ordinary excavator
fitted with a cutting system instead of the ordinary buket Obviously, excavated debris is
removed using a separate machine. Compact in-line cutting units can be used on materials
having compressive strenght up to 500 daN/cm².
ROTATION SISTEM WITH IDRAULICS JACKS
The excavators used for these applications are prepared with slew powered by
hydraulic jacks instead of the slewing-ring and pinion system.
spraiyng system for the dust laying.