Small Boring Machines | The Robbins Company
Robbins Small Boring Unit (SBUA) The SBUA is a small diameter rock cutting head (from 24″/600 mm to 72″/ m) that can be used with any Auger Boring Machine (ABM) to excavate hard rock on drives less than 500 ft (150 m). The Robbins SBUA has been proven on hundreds of jobs across the