Equipment

Akkerman Inc.

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 features a bolt-less, square drive spline to accept TriHawk® I, III, IV, and V steering heads.
  • Suitable for densely compacted soils, soft rock, claystone, stone, limestone, and shale.
  • A small annulus is cut around the pilot tubes requiring minimal amount of lubricant flushing suitable for Akkerman lubrication pumps.
  • Easily adapted to all Akkerman GBM systems regardless of date of manufacture.
  • Low thrust pressures required for tool engagement. All new Akkerman GBM systems come equipped with an RDA jacking pressure control assembly for smooth operation.

RDA Drill Adapter
TriHawk® I
TriHawk® III
TriHawk® IV
TriHawk® V

Specifications
ModelGroundBit TypeCut Diameter
TriHawk® ICompacted Soils, Cobble, Soft RockEmbedded Carbide & Replaceable Bullet Teeth5.12 in
TriHawk® IIHard Soil, Soft RockReplaceable Bullet Teeth w/ Hard Facing5.5 in
TriHawk® IVTill, Cobble, Soft RockEmbedded Carbide5.5 in
TriHawk® VGravel, Loose Fill, Dense SoilEmbedded Carbide4.8 in
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