Connors 20HH Diamond Core Drill

Features
Electrics
75KW TEFC 1,800 rpm, 3-phase electric motor, remote start/stop with lock out E-stop devices
Hydraulics
100cc var. disp. closed loop rotation pump @ 5,000 psi, 20 gpm main pump, pressure compensated (feed, chuck, rod holder, wireline, positioner), FMC W11 mud pump (Bean 435), hyd. guarded wireline hoist (2,000 ft 3/16" cable), hyd. feed frame positioner
Rotation and Feed
32 inch stroke, 16,000 lb thrust, 16,000 lb pull back, 4-speed transmission head, SAHR chuck, hyd. twin cylinder rod holder, 0-1,200 rpm spindle
Advantages
  • Powerful core drill able to fit in small-sized underground openings
  • Can drill at any angle
  • Frame length:  108 inches
  • Frame width:  46 inches
  • Transport height with pneumatic wheels:  86 inches
  • Transport height on skid frame: 76 inches
  • Feed frame can be removed reduce transport height to 59 inches
  • Removable tow bar
Underground Drills
  • 20HH
  • 20HH
  • 20HH
  • 20HH
  • 20HH
  • 20HH
  • 20HH
  • 20HH
  • 20HH
  • 20HH
  • 20HH
  • 20HH

The Connors 20HH is a powerful and versatile frame-mounted diamond core drill for long-hole underground drilling. The 20HH is transportable on a dual axle frame. Wheels and axles can be removed for transport and operation in tighter spaces. Mast height can be varied to setup in entries as low as 7 feet to more than 12 feet high. Holes can be oriented at any angle.

Coring Depth Capacity

  • N 5,000 ft
  • H 3,000 ft

Reaming Capacity

  • Ream to 14-inch-dia. 
  • 8-inch-dia. to 1,000 ft