Rock Drilling
The Rock Drill Adapter (RDA) allows Akkerman pilot tube systems to accurately drill in rock formations using TriHawk® steering head technology that is commercially available. The RDA is designed to use Akkerman’s existing GBM guidance system or the contractor can choose to operate with a Sonde housing for extreme conditions.
FEATURES:
- The Rock Drill Adapter uses a bolt‑less square drive spline compatible with TriHawk® I, III, IV, and V steering heads.
- Suitable for densely compacted soils, soft rock, claystone, stone, limestone, and shale.
- Cuts a small annulus around pilot tubes, requiring minimal lubricant flushing compatible with Akkerman pumps.
- Easily adapted to all Akkerman GBM systems regardless of manufacture date.
- Low thrust pressures required; new Akkerman GBM systems include an RDA jacking pressure control assembly for smooth operation.
SPECIFICATIONS
Print This Page| Model | Ground | Bit Type | Cut Diameter |
|---|---|---|---|
| TriHawk® I | Compacted Soils, Cobble, Soft Rock | Embedded Carbide & Replaceable Bullet Teeth | 5.12-in. |
| TriHawk® III | Hard Soil, Soft Rock | Replaceable Bullet Teeth w/ Hard Facing | 5.5-in. |
| TriHawk® IV | Till, Cobble, Soft Rock | Embedded Carbide | 5.5-in. |
| TriHawk® V | Gravel, Loose Fill, Dense Soil | Embedded Carbide | 4.8-in. |
Testimonials
Lithos Engineering is focused on providing tunnel design and construction management for underground 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.
Robin Dornfest, President
Lithos Engineering