LST1G+ Soil Sampling Drill

The LST1G+ geotechnical rig is ideal for soil sampling, geotechnical testing and well monitoring in limited-access areas. The unit’s 4-inch-diameter auger drills 6-inch boreholes to 100 feet. The setup includes a tower, cathead and pulley to facilitate standard penetration testing with a 140-pound manual safety hammer. Additionally, the drill’s 5,000-pound lifting capacity ensures easy removal of augers and extensions. The drill can be mounted to the bed of a small truck or flatbed using specially designed frames.

  • Drilling Depth: 50 ft (15.24 m)
  • Borehole Diameter: 6 in (15 cm)
  • Pull/Push Back Force: Up to 5,000 lbs (2,268 kg)
  • Soil Types: Sand, clay & soft rock formations
  • Applications: Soil sampling, geotechnical testing, standard penetration testing (SPT) and well monitoring

Package Includes:

  • Honda 20-horsepower gas engine
  • 3,000-psi hydraulic system
  • Tower and cathead for SPT
  • Soil Sampling Kit
  • Hydraulic lift cylinder to raise and lower the mast
  • Tool box & spare parts

Augers & Bits:

  • 3- to 8-inch diameter D-series augers available in 4- or 5-foot lengths
  • 6-inch outside diameter (2.75-inch inside diameter) or 8-inch outside diameter (3.75-inch inside diameter) hollow stem augers
  • Standard point and blade for soft soil, carbide blade for medium to hard soil, and rock tooth auger for hardpan and weathered formations


  • Single axle
  • 3,500-pound (1,590-kg) rating
  • Towable by ATV or truck
  • Three leveling jacks
  • 2-inch ball coupler
  • Spare tire

Optional Components:

  • 140-pound manual safety hammer
  • Split spoon samplers
  • AWJ drilling rod
  • Anchor kit to push beyond the weight of the trailer
  • Specially designed frame to mount on a truck or flatbed



Drilling Depth

Borehole Diameter

Pull/Push-Back Force

Operating Weight

Auger Diameter

Auger Length

Max Drilling Torque




Fuel Tank Capacity

Hydraulic Reservoir



50 ft (15.24 m)

6 in (15 cm)

Up to 5,000 lbs (2,268 kg)

1,850 lbs (893.15 kg)

3 - 8 in (7.6 - 20.3 cm)

4 or 5 ft (1.22 or 1.52 m)

500 ft-lbs (678 N-m)

Heavy-duty welded steel

Honda GX630 20 hp (14.9 kW)

150 rpm at 10 gpm (37.9 L/m)

5 gal (18.9 L)

5 gal (18.9 L)

Truck bed or trailer mounted

All trailer-mounted drills can ship fully assembled in a 20-foot container or knocked down and palletized.