MDT 140 K
The MDT 140 K drilling rig model is positioned in the average-big size segment of multidirectional drilling rigs and in the average-big segment of the drilling rigs for soil consolidation inside the tunnels, thanks to its original peculiarity, that is the possibility to use the same machine to carry out different types of drilling works: micropiles and tie rods accomplishing, soil consolidation, jet grouting operations and drilling works inside the tunnels where the drilling height up to 5 m horizontally is requested.
Excellent qualities in terms of maneuverability, reliability and productivity, even if used in extremely difficult conditions, all this thanks to the adoption of many innovative technical solutions and precise dimensioning of all the elements of the structure.
Active and passive safety devices always guarantee the most safe working conditions to the operator and other rig personnel.

• Articulation of the fifth wheels - gear motor units, mounted on the rig’s frame, enables an additional essential movement while placing the rig for drilling inside the tunnels with the drilling battery having the diameter up to 140 mm and working depth of 13 m.
• Mast stroke 13 m for forepoling drilling inside tunnels.
• Adjustable mast consisting of the fixed base stroke 3,5 m and extension element length 2 m to achieve total stroke equal to 5 m.
Using base mast it is possible to perform reversal arc consolidation inside tunnels while base mast with extension element can be used to perform vertical/inclined or horizontal drilling for tie rods.
• Lattice extensions for mast stroke 5 m to perform vertical jet grouting with useful drilling depth up to 14 m.
• Automatic rod loader with storage capacity starting from 6 drill rods length 4,5 m and max. diameter 114 mm, up to 4 drill rods length 5 m and max. diameter 140 mm. The rod loader can be used with lattice extensions to improve vertical useful drilling max. depth up to 41,4 m, or with mast stroke 13 m for tunnel drilling for a total depth max. of 43 m or with mast stroke 5 m for total depth max. of 32,5 m.
• Portable electric remote-control desk, that guarantees the maximum safety condition and comfort to the operator, during placement, working phases and moving; in particular when climbing and drifting down from the transport carriage on the road.
• Automatic power distribution system “Load Sensing” to optimize the rig’s performance and keep the actual output very high.
• Automatic devices’ application facilitates the use of the rig even when handled by less experienced personnel.
• Ample oversizing of structural parts in view of prevention of possible critical conditions due to eventual operator’s mistakes.

The drilling machine meets the CE norms, especially the UNI-EN 791.

The 210 hp engine application ensures an exceptional capacity, that allows to achieve incomparable productivity levels.
The rotaries with max. torque up to 32000 Nm may be applied, with high specific power that enables contemporaneousness of the
operation with other torque functions and rotation speed, even in case of the double rotary head or external top hammer with rotary head installation.

All the functions of movement, placing, mast positioning and drilling process are remote-controlled in order to minimize the idle time during different working stages. Thanks to a careful controls layout and their reduced number, it will be easy to acquire a good command of the controls for any operator.

The engine is positioned in the rear part of the rig with interposition of the antivibration mount. The display, interfaced with electronic control unit of the engine, allows to visualize all the operational parameters: so, besides the water temperature, oil pressure in the engine and other parameters, you may check the instantaneous value of the absorbed power and fuel consumption, etc.
In case of anomaly, autodiagnosis of the engine status allows to preventthe shutdown of the rig and eventual production blockage.
Accelerator is also controlled electrically, in a gradual way, from the remote control panel or radio control.

Undecarriage is equipped with a rotation fifth wheel, activated by two gerboxes, that facilitates the positioning of the machine on the front of tunnel expecially during treatment of the whole frontal excavation area.
Steel crawlers are moved by two hydraulic motors, connected with epicyclical reduction gears, which are equipped with negative parking break.
Every motor is controlled independently in order to enable the operator to effect even slight movements.

During the working stage, the machine is kept stable by four stabilizers that can be adjusted independently. All the cylinders are equipped with the blocking valves.

The main front fifth wheel, positioned on the rig structure, is provided with a coarse pitch toothing and is moved by four epicyclical reduction gear, having an integrated pinion, able to support a huge radial load.
The articulation group near the mast is moved by two opposite cylinders, equipped with the control valves.
The mast slewing movement is obtained through the fifth wheel rotation.
The main rear fifth wheel, positioned on the rig structure, is provided with a coarse pitch toothing and is moved by four epicyclical reduction gear, having an integrated pinion, able to support a huge radial load.
It supports a telescopic cylinder structurally oversized linking the rear slide of the 13 m stroke mast for tunnel drilling.
Considerable sturdiness of the structure and articulated joints ensures precise positioning of the mast, reducing at the same time moving and shaking caused while stressing during different working stages.

The mast, made of high yield point steel, is equipped with lateral guides, made of special steel, for the rotary head trolley sliding and longitudinal movement of the mast itself. The reduction gear box that activates the chain, which moves the rotary head trolley, is installed in the lower part of the mast in order to guarantee the major accessibility and rapidity of maintenance operations as well as quick installation of mast extensions and all the accessories necessary for jet grouting technology.
The gear and the chain are kept clean thanks to the large exit doors and a special device that prevents from the bug dust coming in contact with them.
With mast stroke 13 m for tunnel drilling a particular automatic device is installed to support rods and casing of varius diameters.

The rotary trolley is provided with 12 rolling bearings, eight of which are adjustable, to ensure a correct placement of the trolley on the lateral guides of the mast.
The trolley is also equipped with a piston for the lateral displacement of the rotary, letting free the borehole axis for the reinforcement insertion.

The MDT 140 K drill rig can can be dressed with wide range of accessories to allow different personalization depending on drilling technologies to be performed.

Specifications subject to change without notice. The global diffusion of the product illustrated hereby imposes, because the different norms, the use of indicative - hence not binding - images and illustrations