Tractor Mounted Drilling Rigs by Hara Rock Drills Pvt. Ltd.

DTH drilling :

Drilling diameter

Depth

Over burden

4.5” (114 mm)

500 feet (150 m)

7” (178 mm)

Carrier

Model

Engine Rating

4x4 wheel drive

75 hp@2200 rpm

Prime Mover

The system shall be powered by a Tractor engine with suitable PTO arrangement

Mounting platform Structure

Electrically welded steel structure fitted to tractor

Mast Assembly

Mast overall Length

Rotary Head travel

Centralize opening

Sturdy structural channel mast electrically welded with suitable cross members

6000 mm

4000 mm

8”(203 mm)

Raising and lowering by Hydraulic cylinder

Feed System

Pull back

Pull down

Hoisting speed

Feed & Hoist actuation: Double acting hydraulic cylinder with wire rope and pulley arrangement

5000 kgf

2400 kgf

40 mtr/minute

Feed system consists of hold back arrangement to control limit weight on bit, rapid and slow feed arrangement to suit variable ground condition

Rotary Head Assembly

(Top Head Drive)

Torque

Rotation speed

Fabricated steel body and spur gear reduction gearbox with oil bath lubrication.

215 kg-m

0 – 120 rpm

The RH unit travels on mast assembly of sturdy construction to

absorb sudden shock loads encountered during drilling

operation

Hydraulics

Max operating pressure

Hydraulic Tank capacity

Filtration (Nom) – Return line

The entire equipment is designed to operate at high

temperature encountered in the normal weather conditions

Open loop circuit with fixed displacement piston pump and proportional valves for feed and rotation. Diverted valves for auxiliary drives

180 Kg/ Cm2

175 Liters

10 / 25 Microns

Cooling: Fin type Air or Oil