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M120 Excavator Drill Mast Attachment | Dewatering - Marine Piers - Rock Drilling

The Rock Drill M120 Drill Mast Attachment for excavators is ideal for pre-drilling hard rock for dewatering, geotechnical and solar applications. Capable of drilling with augers, helical anchors, ground screws, DTH hammers and mud drilling setups the Rock Drill M120 Drill Mast Attachment can drill up to 200 ft for small bore applications, or to shallower depths for larger bore holes, i.e foundation and underpinning applications. For excavator attachment only.

  • Height 23' 10" (7,247 mm)
  • Mast Stroke 20' (6,100 mm)
  • Max Pullback 6,600 lbs (2.992 kg)
  • Weight (mast only) 2,236 lbs (1,014 kg)
  • Clamp System Multiple options available

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Drill Head Options
Only 2
Hose Connections
Skid Steer or Excavator Mounts

The Rock Drill M120 Drill Mast Attachment’s mount plate for excavators can be customized to integrate seamlessly with your carrier machine.

With a simple 2-hose connection for the pressure and return flow on the carrier machines auxiliary hookup, it drilling couldn’t be easier to start drilling.

Setups available for dewatering, solar installs and geotechnical drilling.


The Rock Drill M120 drill mast and M112 drill mast attachments offer options for excavator or skid steer attachment respectively. Mount plates attached to the rear of the drill mast allow for quick attachment / pickup by the carrier machine.

  • Universal skid steer plate fits most skid steer models
  • Excavator mounts built to suit your excavator
  • Simple 2-hose connection to auxiliary ports on carrier machine
  • Connect / disconnect in seconds with included T-Leg system


  • Dewatering
  • Pre-drilling Rock
  • Solar Ground Screws
  • Micro piling
  • Underpinning
  • Geothermal DX
  • Geotechnical


Max Torque - Standard2,600 ft.lbs 3,525 Nm
Max Speed - Standard100 RPM
Max Torque - Optional5,100 ft.lbs 6,914 Nm
Max Speed - Optional80 RPM
Mast Height23' 10" 7,247 mm
Mast Stroke20'6,100 mm
Weight2,236 lbs1,014 kg
System Pressure3,000-3,750 psi206-260 bar
Max Flow24-35 gpm85-133 lpm

Photo Gallery


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