REMOTE CONTROLLED SMALL BORING UNIT (SBU-RC) ABOUT The SBU-RC is a game-changer for the trenchless industry, making long, line-and-grade-sensitive crossings possible at small diameter. The SBU-RC is an unmanned, articulated mixed ground and hard rock boring machine for use with standard Auger Boring Machines (ABMs) or pipe jacking systems. In a launch pit or shaft, the SBU-RC is attached to the lead steel casing. The ABM or pipe jacking system provides thrust through this steel casing. To excavate the material, a circular cutterhead mounted with disc cutters fractures hard rock into chips. In mixed ground, two-row carbide cutters can be used. An in-shield drive motor provides torque for cutterhead rotation, while muck is removed via a tube connected to a vacuum truck at the surface. The SBU-RC incorporates a smart guidance system, installed in an operator's station at the surface. The guidance system shows an operator projections of the future bore path so steering corrections can be made before the machine is ever out of line and grade. An articulated forward shield is able to make adjustments within two degrees in all directions. SBU-RC APPLICATIONS • Line-and-grade-sensitive crossings • Small diameter crossings • Long crossings up to 150 m, depending on conditions • Cost effective alternative to microtunneling in hard rock and mixed ground A COST-EFFECTIVE ALTERNATIVE TO MICROTUNNELING Because the SBU-RC uses vacuum spoil removal, there is no slurry as would be needed for standard microtunneling. The simplified operation takes out the extra step of slurry cleaning and gives contractors a more cost-effective alternative. The end result is a highly successful machine with a price tag that wins bids, time and again.

SBU-RC CUTAWAY VIEW Articulation cylinders for accurate steering Mixed ground or hard rock cutterhead with single and/or two-row cutters and bits Vacuum tube for muck removal Stabilizer pads in each quadrant of the shield In-shield drive motor provides torque SPECIFICATIONS MACHINE DIAMETERS 600 to 1,100 mm ROCK STRENGTHS Up to 137 MPa UCS GROUND CONDITIONS Medium to hard rock or mixed ground above the water table. Mixed ground may include rock with gravel and clay seams or other non-compressible materials. VACUUM SYSTEM 170 m3/min - supplied by customer ELECTRICAL Powered by VFD. 50 Hz or 60...