Diaphragm drilling machine Kelly HGG / HGR has the following features:
- Full guidance during excavation
- Reels with an automatic device for the tensioning and recovery of the hydraulic flexible hoses
- High closing force of the HG type hydraulic diaphragm wall grab. Excavation sets of different dimensions and variable section, rectangular o semicircular, are interchangeable on the same grab body.
- Hydraulic rotation of the grab by +/- 45°
- Mast mounted HGR kelly can be powered by the hydraulic plant of the drilling rig
- Crane mounted CHP 100K hydraulic power pack meant to actuate the HGG kelly
- Possibility to hydraulically correct the verticality of the telescopic shaft assembly indipendently of the position of the base machine