Hydracore Gopher Underground

The Hydracore Gopher Underground drill is made for mines where a lot of short holes need to be drilled quickly

Hydracore Gopher Underground

The Hydracore Gopher Underground is made for mines where a lot of short holes need to be drilled quickly. Like all Hydracore machines this drill has been designed for maximum efficiency while keeping the machine simple so that it can still be repaired in the field by the average driller. It is much simpler than competing machines, but it can drill just as fast, and is more reliable. Most other drill designers do not strive for this simplicity. Guards are placed over components and fittings that could otherwise be easily broken with the rough handling the drill will get, and while everything is built to take the abuse that is normal in the harsh underground environment, aluminum is used as much as possible to keep the drill light for easy moving.

Specifications for 50 HP version

Capacity

A Size1,500 ft (450 m) [requires a larger winch]
B Size900 ft (270 m)

Drill Head

Motor DisplacementRPMTorque
Maximum600500 ft-lbs
Minimum1,800160 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 5000 psi and the maximum pressure in forward is only 2500 psi.

Hydraulic Chuck

OperationAccumulator closed, Hydraulic opened
Axial Thrust12,000 lbs
CapacityA to B
No. of Jaws6
Maximum Rod Size2 3/8"

Foot Clamp

OperationAccumulator closed, Hydraulic opened
Axial Thrust8,000 lbs
CapacityA to B
No. of Jaws2
Maximum Rod Size3 1/2"

Drill Slide and Feed Cylinder

Maximum Pull6,500 lbs. at 2,700 psi
Maximum Thrust6,500 lbs. at 2,700 psi
Stroke60 1/2"
Length105"

Powerpack

Electric Motor480 V 3-phase 50 HP TEFC
Main Pump30 GPM at 3,500 psi
Auxiliary Pump10 GPM at 2500 psi
Feed Pump2 GPM at 3000 psi
Hydraulic Tank20 Gallons (US)
CoolingWater to oil cooled

Options

20 GPM at 1,000 psi Hydraulic Water Pump
45 GPM at 1,000 psi Hydraulic Water Pump
Wireline Hoist 900 ft Capacity
Wireline Hoist 2,000 ft Capacity
Double Mine Bar Mounting Set
Hydraulic Feed Frame Positioner
Unitized Skid
Hydraulic Mud Mixer

Weights

Drill Head350 lbs
Foot Clamp90 lbs
Drill Feed Frame373 lbs
Hydraulic Module1,000 lbs
Complete Drill on Base4,200 lbs