Tunnel boring machine SBU-A

Imagine using the best rock excavating technology on your next project Own or rent the Robbins Small Boring Unit (SBU-A) and experience the most time and cost effective way to bore through hard rock. The Robbins SBU-A has been proven on hundreds of jobsites across the country. Beat your competition on the bid, impress the job owner, and walk away more profitable when you use the Robbins SBU-A on your next job. No other company exists that knows more about excavating hard rock. And no other company makes a product like the Small Boring Unit. Over one hundred contractors in cities and locations all over North America have proven the SBU-A works better than any other method of excavating small diameter hard rock bores. Many contractors around the U.S. have successfully used this equipment. Some contractors own nearly every size SBU-A that Robbins manufactures. The SBU-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. DIAMETERS AVAILABLE RANGING FROM 24″ (600 MM) TO 72″ (1.8 M) The SBU-A and all component parts are readily available in any bore diameter with standard English (inch) or metric (mm) casing sizes in stock. THE SBU-A CAN INSTALL DRIVES OVER 500 FT (150 M) IN LENGTH