Auger Boring Machine (ABM) Technical Description The Robbins Auger Boring Machine (ABM) is used to bore horizontally through soil or rock with a cutting head and auger. ABMs are used to install steel casing on road, river, and rail crossings. A starting pit is used to launch the ABM on a predetermined length of track. The machine excavates with the cutting head, while jacking force is provided by hydraulic thrust cylinders. Steel casing pipe and auger sections are added as the machine advances. Spoil is removed from the auger through the casing to a door located on the side of the master pusher. A Versatile Solution The Robbins ABM can be used in a variety of ground conditions, from soil to hard rock. The machine is made for use with SBU Products in hard rock, as well as with soft and hard soil cutterheads. The ABM is capable of excavating soil, sand, clay, cobble, glacial till, soft shale and some sandstone. Both the SBU-A and the SBU-M are the ideal attachments to be used with the Robbins ABM in hard rock and mixed ground. ABM APPLICATIONS: • Soft ground utility installations • Hard rock utility installations (with SBU products) AVAILABLE FOR PURCHASE OR LEASE

Side View Shown with master track section and one extension section Sub frame assembly Base frame assembly Master Pusher Engine Hex drive adapter Master saddle Track set Rack Drive Safety hook roller SPECIFICATIONS MACHINE DIAMETERS GROUND CONDITIONS Soil, sand, clay, cobble, glacial till, soft shale, and sandstone. ABM can also be used with SBU products to excavate hard rock and mixed ground from 4,000 to over 25,000 psi UCS. Bore Capacity Optional Lift Kit Engine Net Power Peak Engine Torque Gearbox Ratio Transmission Hex Drive Cylinders Max. Thrust Min. Pit Size Total Weight Centerline 12...