Small Boring Unit-a

The Small Boring Unit-A is a small diameter cutterhead and thrust bearing assembly (from 24 in / 600 mm to 72 in /1.8 m) that can be used with any auger boring machine (ABM) from 36 in (900 mm) to 72 in (1.8 m). The SBU-A is welded to the lead casing. The contractor-supplied auger pilots directly onto a taper hex shaft in the thrust bearing assembly. The SBU-A contains a high-thrust bearing and is equipped with mini disc cutters available in three sizes depending on your project. It can be steered to maintain line and grade.
If your job is in mixed ground containing cobbles and boulders, an alternative cutter headis available. Depending on the conditions, mixed ground cutter head scan feature a combination single disc cutters or two-row tungsten carbide insert cutters and carbide cutter bits. Specialized larger muck openings allow the cobbles and boulders to pass through without stopping excavation.
Diameter available in sizes ranging from 24a (600 mm) to 72a (1.8 m).