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Our 4″ CR is the best choice for 30,000 to 100,000 pound rigs. The 4″ CR 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 2 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: 300 psi (21 bar) with minimum of 750 cfm (21 m3/min) to operate effectively.

All DCI transmitters and Underground Magnetics, both 15” and 19”, work within the hammer and is wireline adaptable. Adapters are available for Subsite beacons.

*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 2,000 psi (138 bar) rated backflow preventer and a hand-operated stainless steel ball valve.


Hammer Lubrication Guide

4" Model R Exploded View

4" Model CR Exploded View


System Details

Part Description  

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

Part P13R part1

Part P13R part2

Part P13R part3

P1-1001 Spanner Wrench

Part P1 1001

P1-1002 T-handle Wrench Part P1 1002
PSP 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
Part PSP
P1SP081 Remote (transmitter) Wireless remote control to
turn air ON/OFF or drilling fluid pump ON/OFF
Part P1SP081



30'x2" Air hose

20'x2" Air hose

Part PSP1004
PSP1006 50'x1" Drilling fluid hose with barbed adapter
and filter
Part PSP1006
P1SP065 (2) - 2" Male hammer lock adapters Part P1SP065
P1SP073 2" Female hammer lock adapter Part P1SP073
PSP1001 (4) - Whip check safety cables Part PSP1001

What's Included

  • (1) - Complete hammer with bit
  • (1) - Support Pack
  • (1) - Remote transmitter
  • (1) - 20'x2" Air Line with fittings
  • (1) - 30'x2" Air Line with fittings
  • (1) - 50'x1" Drilling fluid hose
  • (4) - Whip checks (safety cables)
  • (2) - 2" Male Hammer lock adapters
  • (1) - 2" Female Hammer lock adapter
  • (3) - Days Onsite Training