The Steerable Rock System (SRS) boring head works in solid rock and fractured rock up to 25,000 psi. A half-open-faced design pulls fractured rock into the cutting head, where it is either crushed or swallowed to create a consistent boring path. The system includes disc cutters and rock picks. Disc cutters break up solid rock; rock picks pull remaining fractured rock that the cutters could not disperse.
The system operates with a full-rotational turntable, which eliminates the need for a single main bearing, the company says. An automatic grease system lubricates the turntable.
The system and its control station are compatible with any make or model of auger boring machine that has the necessary torque requirements and is available in sizes 36 to 60 inches.