Akkerman Inc.

The Rock Boring Unit (RBU) makes it possible to use any manufacturer’s auger boring equipment to install a range of common diameter steel casing pipe in high compressive geology. The RBU features 6.5‐in. disc cutters, muck scrapers, a high capacity main bearing, and water‐jetting to advance pipe through rigorous ground conditions. The RBU performs well in rock and varying challenging ground conditions.

Water‐jetting actively cools the cutter head tooling and bearing assembly resulting in extended performance, reduced wear, and lower operating costs.

  • Use any auger boring machine to install 24‐48‐in. steel casing
  • Robust design with high capacity thrust load disc cutters to fracture rock into cuttings aggressively
  • Cutter head rock scrapers assist in transferring cuttings away from the face to the inlet cavity, to the lead auger for removal
  • Fluid connection ports for cooling the bearing assembly for longer life and cleaning the disc cutters in clay/silt ground conditions
  • RBUs are inventoried and available for global sales with rental options in North America

Rock Boring Unit (RBU) 24
Rock Boring Unit (RBU) 30
Rock Boring Unit (RBU) 36
Rock Boring Unit (RBU) 42
Rock Boring Unit (RBU) 48

ModelCasing DiamterThrust /
RBU 2424 in25 ton /
2,200 lbs
RBU 3030 in25 ton /
2,800 lbs
RBU 3636 in34 ton /
4,000 lbs
RBU 4242 in45 ton /
4,700 lbs
RBU 4848 in50 ton /
5,500 lbs
Print This Page


Lithos Engineering

Lithos Engineering is focused on providing tunnel design and construction management for underground construction projects across the United States and has worked with many different tunnel contractors on projects of varying sizes and complexity. I am always happy
to see Akkerman equipment on our project sites and I know we can rely on Akkerman products for a high level of performance and reliability.

I had the pleasure of working with Akkerman on one of our projects for which they designed and constructed a project specific hard rock TBM for a curved water conveyance tunnel high in the Rocky Mountains of Colorado. Akkerman not only provided great solutions and technical support for the project but was a pleasure to work with in a collaborative teaming environment that allowed us to not only reduce project risks but reduce construction costs and schedule. During that project, I visited the Akkerman production facility to inspect the TBM under construction; I was extremely impressed with the Akkerman management, staff, and systems for quality control. I look forward to a long future of working with Akkerman and their products on our tunneling projects.

See What Our Clients Say