Hydracore 2000 Underground

The Hydracore 2000 Underground drill uses many of the same components as the Hydracore 2000 surface drill

Hydracore 2000 Underground

The Hydracore 2000 Underground uses many of the same simple, reliable, low maintenance, and well proven components as the Hydracore 2000 surface drill. The drill head, clamp, water pumps, mixers, and winch, are the same as on the surface Hydracore 2000 Drill. The hydraulic powerpack also uses mostly the same components. It uses the same simple and efficient hydraulic circuits as the surface version. This makes it very economical to own if a company needs to do both surface and underground drilling, as many of the spare parts will fit either drill.

The special components for the underground version are the feed frame, and the feed frame positioner. The underground feed frame is made to be as short as possible so that the drill stations can be kept to the minimum size. A unique cylinder is used that is better than what other suppliers have. The hydraulic feed frame positioner allows the drill to be quickly positioned to drill at any angle from +90 to -90.

Specifications for 100 HP version

Maximum Capacity

B Size5,540 feet (1,300 m)
N Size3,280 ft (1,000 m)
H Size1,960 ft (600 m)

Drill Head

Motor DisplacementRPMTorque
Maximum4701,120 ft-lbs
Minimum1,550373 ft-lbs

* Speed/Torque is continuously variable between maximum and minimum values. More torque is available in reverse for rod breaking, because the reverse pressure is set at the intermittent pressure of the system of 5,000 psi and the maximum pressure in forward is only 3,000 psi.

Hydraulic Chuck (Hydracore Link Chuck)

OperationSpring closed, Hydraulic opened
Axial Thrust30,000 lbs
CapacityB to H
No. of Jaws3
Maximum Rod Size3 1/2"

Foot Clamp

OperationAccumulator closed, Hydraulic opened
Axial Thrust25,000 lbs
Maximum CapacityB to H
No. of Jaws2
Maximum Rod Size4 1/2"

Drill Slide and Feed Cylinder

Maximum Pull18,000 lbs
Maximum Thrust18,000 lbs
Stroke60 1/2"


Electric Motor100 or 125 HP
Electric StarterAu Com solid state soft start,
with ground fault protection,
and 1 KVA transformer
Main Pump46 GPM, 3,000 psi
Auxiliary Pumps15 GPM, 2,500 psi
Feed Pump1 GPM, 5,000 psi
Hydraulic Tank20 Gallons (US)
CoolingWater cooled, 2 heat exchangers


20 GPM 1,000 psi Water Pump Hydraulic (General T81)
45 GPM 1,000 psi Water Pump Hydraulic (Cat 3545)
Wireline Hoist 2,000 foot Capacity
Wireline Hoist 3,000 foot Capacity
Double Mine Bar Mounting Set
Hydraulic Feed Frame Positioner
Unitized Skid
Hydraulic Mud Mixer


Drill Head (steel, with chuck)
550 lbs
Foot Clamp90 lbs
Drill Slide & Feed Cylinder550 lbs
Powerpack4,000 lbs