Small Boring Unit Motorized

The Small Boring Unit Motorized is a motorized, manned-entry rock boring attachment meant to bore in a variety of rock types with Unconfined Compressive Strengths (UCS) of 4,000 psi to over 25,000 psi (25 to over 175 MPa). It is made for use with any Auger Boring Machine from 48a to 78a (1.2 to 2.08 m) or any standard pipe jacking unit.

The SBU-M is made for longer bores, and maintains line and grade for the length of the bore.
a cIn-shield drive motor
a cPipe jacking option
a cManned-entry for laser-guided steering
a cAccess to the cutterhead while boring to allow for changing and repositioning cutters.The SBU-M uses a hydraulic or electric motor to generate torque. The auger boring machine still applies thrust to the steel casing.

For spoil removal, an invert auger enclosed in steel casing runs beneath the bearing housing and drive motor assemblies. To seal off the cutterhead and protect the motor, a steel bulkhead is added to direct the rock chips into the invert auger.
Steering is accomplished in the SBU-M via an articulating front shield. A laser is set up in the back of the bore pit and projected onto a target inside the machine. The operator can then control the machine using stabilizer pads and hydraulic articulation cylinders that pivot the machine on an articulation joint.
Diameter Size available for mixed ground or hard rock between 48a and 78a (1.2 meter to 2.0 meter).