AT120 ALL TERRAIN DIRECTIONAL DRILL

  • Ditch Witch
  • All Terrain

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Key Features & Specs

Max Power. Ultimate Precision. Built for the Toughest Terrain.

The Ditch Witch® AT120 All Terrain Directional Drill is the most powerful, productivity-focused horizontal directional drill in its class. With 120,000 pounds of thrust and pullback and 15,500 ft-lbs of rotational torque, the AT120 is built to dominate long bores, hard rock, and unpredictable ground conditions. If you're looking for unmatched performance, all-day comfort, and rugged reliability, the AT120 is the drill to beat. See our entire Directional Drill inventory, including all-terrain specific models, today! 

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  • Operation

    Spindle speed, max - 200 rpm; Spindle torque, max - 15,500 ft∙lb

    Carriage thrust travel speed - 210 fpm; Carriage pullback travel speed - 210 fpm

    Thrust force - 120,000 lb; Pullback force - 120,000 lb

    Bore diameter - 6.5 in; Backreamer diameter - Soil dependent

    Ground travel speed: Forward/reverse - 2.8 mph

  • Power

    Engine - Cummins QSB6.7; Fuel - Diesel

    Cooling medium - Liquid; Injection - Direct

    Aspiration - Turbocharged & charge air cooled; Number of cylinders - 6

    Displacement - 409 in³; Bore - 4.21 in; Stroke - 4.88 in

    Manufacturer’s gross power rating - 280 hp; Rated speed - 2,200 rpm

    Emissions compliance - EPA Tier 4F

  • Dimensions

    Length - 453 in; Width - 100.4 in; Height, w/ cab - 121.5 in

    Operating weight - 49,761 lb

    Entry angle - 12-18°; Angle of approach - 17°; Angle of departure - 17°

  • Drilling Fluid System

    Pressure, max - 1,100 psi

    Flow, max - 285 gpm

  • Noise & Vibration Levels

    Operator sound pressure per ISO 6394 - < or = 80 dBA

    Average vibration transmitted to the operator’s hand and whole body during normal operation does not exceed 2.5 and 0.5 m/sec² respectively.

  • Battery (2 Used)

    SAE reserve capacity rating - 175 min

    SAE cold crank rating @ 0°F (-18°C) - 950 amps

  • Fluid Capacities

    DEF tank - 12.2 gal; Hydraulic reservoir - 39 gal; Fuel tank - 120 gal

    Engine lubrication oil, w/filter - 18.5 qt; Antifreeze tank - 20 gal

  • Why Choose the AT120 Over the Competition?

    When stacked against major competitors like the Vermeer D1320x900 or the American Augers DD-110, the AT120 comes out ahead in a few key areas: 

    • Compact Footprint: Despite its immense power, the AT120 features a more compact profile than similar drills, making it easier to maneuver in tight job sites. 
    • Dual-Pipe All Terrain System: Ditch Witch’s patented dual-pipe drilling system delivers maximum torque to the bit while minimizing wear, outperforming single-pipe systems in fractured or abrasive formations. 
    • Operator Comfort: The AT120’s climate-controlled cab, ergonomic controls, and 360-degree visibility offer an elevated experience compared to the more utilitarian layouts in comparable rigs. 
    • Integrated Electronics: Advanced touchscreen controls, real-time bore tracking, and service diagnostics set the AT120 apart in automation and ease of use. 
  • Key Specs & Performance Highlights : 

    Thrust / Pullback:
    120,000 lbs of thrust and pullback force gives the AT120 unmatched power for long, challenging bores. Whether pushing through solid rock or pulling heavy product lines, the consistent linear force ensures productivity in all terrains.

    Rotational Torque:
    The inner pipe delivers up to 15,500 ft-lbs of torque, while the outer pipe provides up to 3,000 ft-lbs. This dual-pipe system isolates inner pipe rotation for better bit control in rock and high-resistance materials, minimizing vibration and increasing tooling longevity.

    Spindle Speeds:
    The inner pipe reaches spindle speeds of up to 200 rpm, while the outer pipe caps at 150 rpm. These high-speed capabilities allow for faster cutting and cleaner boreholes even in complex geology.

    Drilling Fluid System:
    Integrated fluid pump supports pressures up to 1,200 psi, ensuring consistent fluid flow for effective cuttings removal, bore stabilization, and cooling even on long-distance runs.

    Engine & Powertrain:
    Powered by a 280-hp Cummins® QSL9 Tier 4 Final diesel engine, the AT120 meets emissions standards while delivering high torque and fuel-efficient operation in demanding conditions.

    Cab and Controls:
    The cab features pressurized, climate-controlled comfort with ergonomic seating, full 360° visibility, and intuitive touchscreen displays. Operators benefit from advanced diagnostics, bore planning software, and real-time system monitoring.

    Drill Pipe Compatibility:
    Compatible with 15-ft drill pipe featuring a 3.5-inch inner pipe and 5.0-inch outer pipe. The extended length helps reduce makeup time and boosts overall jobsite productivity.

    Onboard Fluid Capacity & Pumping:
    Fluid system integrated with onboard mud pumps minimizes external equipment needs. This results in faster setup and teardown, especially beneficial for mobile or remote operations.

    Transport & Mobility:
    Weighing approximately 52,000 pounds and capable of travel speeds up to 3.2 mph, the AT120 offers better mobility between job sites than other large drills in its class.

    This machine is ideal for utility installation, pipeline work, and rock-heavy bore paths that demand consistent torque and precision.

  • Built for Rock. Engineered for Efficiency: 

    The AT120 is designed for drilling contractors who demand performance in extreme conditions—whether it’s hard rock, cobble, or long-distance runs. The dual-pipe system isolates inner and outer pipe rotation, giving operators fine-tuned control and extended tooling life. Combined with Ditch Witch's reputation for service and support, the AT120 is more than just a powerful drill—it's a long-term asset that increases uptime and jobsite productivity.