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Mechanical

B51

The B51 is the next evolution of classic Mobile Drill power and versatility. Delivering up to 9,876 ft-lbs of torque, the B51 is available in both track- and truck-mounted configurations, making it ideal for the 100–125 ft hollow-stem auger market.

Designed with a compact footprint mechanical drive unit, the B51 is perfectly suited for the geotechnical industry, offering performance without sacrificing maneuverability.

At the heart of the B51 is its power shift transmission, allowing operators to shift gears — and even change direction — without stopping rotation. This innovative feature provides unmatched control of the drill string, especially when working in stiff or sticky clays, resulting in faster, safer production in the toughest conditions.

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B51 Brochure
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Specification
FEED SYSTEM

  • Pulldown Force: 15,708 lbs [7,125 kg]

  • Retract Force: 24,544 lbs [11,133 kg]

  • Feed Speed, Down: 0-53 ft/min [0-16 m/min]

  • Feed Speed, Retract: 0-34 ft/min [0-10 m/min]

  • Feed stroke: 6 ft [1.83 m]

  • CPT equipped: 2 cm per second

POWER UNIT

  • Deck Engines: John Deere, 74 hp

    *Other engine options available

DRILL HEAD ROTARY

  • Total enclosed “dry box” with tapered roller bearings.

  • Open Spindle Bore: 2 in [51 mm]

  • 4 Speed Powershift Transmission

  • Maximum Torque: 9,876 ft-lb [13,390 Nm] @ 20 rpm

  • Maximum Rotary Speed: 618 rpm

HOISTS

  • Main-Single Line Capacity: 6,000 lbs [2,722 kg]

  • Main-Single Line Capacity: 3,000 lbs [1,361 kg]

  • Safe-T-Driver-Single Line Capacity Available

  • Wireline Hoist-Single Line Capacity: 700 ft [213 m]

  • Front winch: 8,000 lb [3,628 kg], 12,000 lb [5,443 kg], or 15,000 lb [6,804]

ROD CLAMP & BREAKOUT WRENCH

  • Rod clamp, manual positioning: 1-5/8 in. through 8-1/4 in.

  • Rod clamp, hydraulic positioning: 1-3/8 in. through 5-1/2 in.

  • Breakout wrench, hydraulically actuated

LEVELING JACKS

  • Dual front and dual rear cylinders with a 36-in. stroke

SPT AUTOMATIC HAMMER

  • ASTM D-1586 standards

  • Multiple slug sizes available

WATER PUMP & TANKS

  • Piston, peristaltic, bean, and progressive cavity options

  • 100 gal [378 l] tank options available

STORAGE OPTIONS

  • Integrated 10-ft [3 m] rod rack/water tank

  • Double rod rack with 10-ft [3 m] & 5-ft [1.5 m] capacity

  • Front-loading auger rack

  • Integrated double metal toolbox

OPTIONAL EQUIPMENT

  • Drive-tool quick-change adapters

  • Hydraulic chuck: various sizes

  • Double unit aluminum toolboxes

  • Fold-down work table

  • Auxiliary circuit with QD’s

  • Night lights

  • Extruder

  • Cable holders

  • DC-to-AC inverter

  • Skid plates

  • Safety cage options

ESTIMATED OPERATING CAPACITIES

  • Hollow Stem Augers, 4-1/4 in [108 mm] ID: 130 ft [40 m]

  • Continuous Flight Auger, 6 in [152 mm] OD: 225 ft [67 m]

  • Rotary Drilling, NWJ/NW: 1,000 ft [305 m]

  • Diamond Core Drilling, N Wireline: 900 ft [275 m]