Borehole Diameter: 6-inch
Pull/Push Back Force: 8,500-lbs
Soil Types: Sand, clay & soft rock formations
Applications: Soil testing, core sampling, geotechnical engineering, standard penetration testing (SPT), and well monitoring
Transport Options: Truck bed or trailer mounted
The LST1G+HD geotechnical drill rig offers enhanced power and capabilities when compared to the LST1G+. It features a planetary reduction gearbox for as much as 1,100 foot-pounds of torque and has a reduction mechanism for 8,500 pounds of push-/pull-back force for tackling challenging soil conditions. The unit drills as deep as 100 feet with an optional 4.25-inch hollow stem auger for standard penetration tests and soil sampling. Lone Star increased the strength of the steel frames on the unit by 50 percent when compared to the LST1G+. The unit comes standard with a 27-horsepower Kohler gas engine that features electronic fuel-injection and a powerful 3,000-psi hydraulic system. The hydraulic power pack operates at 13.5 gpm to achieve a rotary speed as fast as 200 rpm.
This fully hydraulic drill rig can be mounted to the bed of a small truck or flatbed, or onto a rugged, lightweight, single-axle trailer. Ship the LST1G+HD fully assembled in a 20-foot container or knock down and palletize for transportation by truck or ocean freight.
- Heavy-duty welded steel frame, rotary and swivel provide added durability, 50% stronger than LSTIG+.
- The LST1G+HD geotechnical rig is available as basic drill rig or full drilling package.
- LST1G+HD features a convenient by-pass flow control.
- Swivel base design swings rotary aside for quick, easy access to borehole.
Trailer Mounted Option
2,000 lb rated tandem axle
Optional anchor kit allows pushing beyond the weight of the trailer for additional force.
Easily towed by ATV or small truck
4 ft x 5 ft open grating bed
Leveling jacks (3)
2 in ball coupler
Truck Mounted Option
Ideal for small trucks
Jacklegs for stabilization
Accessible grease points
Mast Folded for Travel
Rotary & Swivel
Water Well Drill Kit Includes:
Kohler 27-Horsepower Gas Engine
Auger drive head: 150-rpm at 10-gpm
Powerful 3,000-PSI hydraulic system
50 ft. of 4 in. diameter D-series auger
Tower and cathead for standard penetration tests
Hydraulic lift cylinder to raise and lower the mast
Can be shipped fully assembled in a 20-ft container or knocked down and palletized.
140-Pound Safety Hammer
Split Spoon Samplers
AWJ Drilling Rod
Mud Rotary Package
Augers & Bits:
4-8 in. diameter D Series Augers available in 36, 48 or 60 in. length
Hollow stem auger in 6 or 8 in. diameter
Standard point & blade for soft soil, carbide blade for medium to hard soil, rock tooth auger for hardpan and weathered formations
Soil Sampling Kit Included
Pull/Push Back Force
Max Drilling Torque
Fuel Tank Capacity
Hydraulic Power Source
100 ft (30.5 m)
6 in (15.2 cm)
1,950 lbs operating (884.5 kg)
3 - 8 in (7.6 - 20.3 cm)
36, 48 or 60 in (91.4, 121.9 or 152.4 cm)
up to 8,500 lbs (3,855.5 kg)
1,100 ft*lbs (1,491.4 N m) @ 2,800 psi
Heavy-duty welded steel, 50% stronger than LSTIG+
Truck bed or trailer mounted
Kohler 27 hp electronic fuel-injection (2,0134 W)
5 gal (18.9 l)
200 rpm @ 13.5 gpm (200 rpm @ 51.1 l/m)
1-1/4 in (3.18 cm) box connection standard, 1-1/8 in (2.85 cm) or 1-5/8 (4.13 cm) in hex optional
4-way dented valve
4-way spring-centered valve, bypass flow control on push down, circuit provides adjustable weight on bit
12-volt battery with electric start
3 gal (11.4 l)
Oil cooler with 10 in (24.4 cm) fan