4” Prospector Hammer

Our 4″ R is the best choice for 30,000 to 100,000 pound rigs. The 4″ R allows contractors to spend less time on the job by reducing cost and improve time efficiency.

The 4” model helps maintain a small equipment footprint without other auxiliary equipment beyond the required air compressor.

Using the Prospector Air Hammer System means there is little to no cleanup or environmental issues. The hammer requires only 1 to 3 gallons of water per minute.

Our 4” air hammer model cuts a 5.750 inch hole and operates effectively & efficiently on D24x40 up to D130x150. Air compressor requirements: 350 psi (24 bar) with minimum of 750 cfm (21 m3/min) to operate effectively.

All DCI transmitters, both 15” and 19”, work within the hammer and is wireline adaptable. Adapters are available for Subsite beacons. The 4” Prospector air hammer is easy to maintain and service as it contains only 3 moving parts, check valve, piston, and bit.

Pioneer One’s 4″ Prospector Hammer System


  • Complete hammer with Bit
  • Support Pack with wireless controlled air valve, drilling fluid pump that can pump ½ to 4 gallons per minute, and an automatic oiler with a non-pressurized tank.
  • Wireless remote control to turn air ON/OFF or drilling fluid pump ON/OFF
  • 1-2in x 20-ft Air Line with fittings
  • 1-2in x 30-ft Air Line with fittings
  • 1-1in x 50-ft Drilling fluid hose with barbed adapter and filter
  • 4-Whip Checks (safety cables)
  • 2-2in Male Hammer Lock Adapters
  • 1-2in Female Hammer Lock Adapter

Options: Substitute a hammer oiler for the Support Pack.  The hammer oiler is an automatic oiler with a non-pressurized oil tank which also includes a 2000 psi (138 bar) rated backflow preventer and a hand-operated stainless steel ball valve. The hammer oiler is a manual machine and must be operated by hand.



Complete Hammer

  • 1.8 ° Bent Sub
  • 2.875″ Regular Pin Connection at Sonde Housing

Slant Face Bit

  • P14R8018 Button
  • P14R8022 Blue Max Button
  • P14R8018B Ballistic
  • P14R8025 Semi Ballistic

Sonde Carriage

  • P1T4175 Complete 15″ Sonde Carriage
  • P14BRT4146-01 Air Diffuser


Ballistic Bit pioneer.one.parts.2014-35

Sonde Carriage




Spanner Wrench



T-Handle Wrench



Support Pack



Remote (Transmitter)


Air Hose Package

  • PSP1005 20ft x 2in Air Hose
  • PSP1004 30ft x 2in Air Hose



Drilling Fluid Hose: 50ft x 1in hose with barbed adapter and filter



Two 2in Male Hammer Lock Adapters



One 2in Female Hammer Lock Adapter



Four Whip Check Safety Cables

Whip Check Safety Cables