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Geotech drill offers depth control with automatic hammer

August 9, 2017  By Administrator

The Lone Star LST1G+HDA Geotechnical Drill from Little Beaver provides engineers and soil technicians with a precise and easy-to-operate drilling solution for standard penetration tests and soil sampling in nearly any soil.

Lone Star designed the drill to address growing demand for automatic hammers that deliver improved depth control compared to manual hammers. The LST1G+HDA comes standard with a 140-pound automatic safety hammer. The heavy-duty rig is mounted on a manoeuverable, single-axle trailer that can be towed behind a small or standard sized truck.

The LST1G+HDA is capable of drilling 152.4 mm (6 in.) boreholes down to 30.48 m (100 ft.). The drill can also be used with Little Beaver’s split spoon samplers and AWJ drilling rod for obtaining core samples or conducting geotechnical testing and environmental soil sampling.


Little Beaver offers several auger options to adapt to varying applications. Solid stem augers are available in 3 to 8 in. diameters and hollow stem augers are available in 6 and 8-inch diameters. The hollow stem augers, which can drill to 60 feet, feature a 2.75- or 3.75 in. internal diameter for collecting samples without risking contamination from surrounding soil. The LST1G+HDA’s standard configuration allows for dry auger boring with the use of a solid or hollow stem auger. The drill is also capable of mud rotary boring using an optional mud pump, swivel and bit.

A 27-horsepower Kohler EFI gas engine powers the drill, which includes a 3,000-psi hydraulic system.

The 3,000 lb. unit is mounted on a rugged yet lightweight single-axle trailer equipped with a 2 in. hitch, levelling jacks and spare tire. For improved manoeuvrability, the company offers a specially designed frame for mounting the unit to a one-ton flatbed truck.

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