The STR-155 is our 55hp drill rig for SPT soil testing, wireline core testing and rotary drilling. It is designed for the engineer that requires an easily maneuverable, yet powerful SPT & coring soil investigation rig.
The STR-155 allows the engineer to install augers and micropiles, in addition to wireline core sampling and rotary drilling. This rig comes complete with a mud and water pump, manual or automatic SPT hammer system, retractable mast, dual winches for wireline drilling, and a compact and incredibly powerful 4-speed gearbox drill motor with a built in heavy duty wet swivel.