SBU DIVISION Metric Version The Robbins Rockhead is ideal on longer utility installations (over 150 m) where line and grade are critical. The Rockhead is available in Double Shield (SBU-RHDS) or Single Shield (SBU-RHSS) models. The Double Shield Rockhead is self-propelled using a gripper system. The Single Shield Rockhead must be used in conjunction with a pipe-jacking system or primary liner erected in the tailshield. Muck can be removed using a small invert auger or muck cars. ROCKHEAD APPLICATIONS • Line-and grade-sensitive crossings • Replacement for carbide bit and roller cone cutterheads • Long bore lengths • Pipe jacking up to 300 m+ • Tunneling up to 600 m+ GUIDED TUNNELLING The Rockhead can be steered throughout the drive from an operator’s console inside the rear shield. Articulation cylinders and stabilizer pads allow for continuous control of line and grade. The machine’s heading can be continuously monitored using a laser targeting system. A COST EFFECTIVE SOLUTION The Rockhead offers more efficient excavation than typical carbide bit or roller cone cutting heads. Most carbide cutting tools tend to break off in rock above 50 MPa UCS. The Rockhead uses disc cutters to chip away hard rock from 25 to over 175 MPa UCS. AVAILABLE FOR PURCHASE OR LEASE

Articulating Front Shield Bearing Housing Assembly Gripper Assembly [Double Shield Only] Drive Assembly Operator Station Belt Conveyor Thrust Cylinder FRONT VIEW CUTTERHEAD FEATURES MACHINE DIAMETERS +/- 2 degrees articulation for steering Man access to face for cutter inspection and replacement MUCK REMOVAL OPTIONS THRUST SYSTEM FEATURES MACHINE LENGTHS Center shaft style cutterhead support Belt conveyor In-shield hydraulic propulsion Both hard rock and mixed ground versions available Pipe jacking station optional Self-propelled SBU-RHDS with gripper system CUTTER OPTIONS ROCK STRENGTHS 25 to...