Vermeer D36x50 series II Drillheads

Providing the Versatility You Desire with the Rock Adaptable Terrain Tool (R.A.T.T.)

The latest patent-pending innovation by Vermeer offers the underground construction industry a new tool to drill and steer through most soil conditions - from soft soil, gravel, cobblestone, or solid rock. Known as the Rock Adaptable Terrain Tool (R.A.T.T.), this drillhead tool was designed for Vermeer NAVIGATOR horizontal directional drills (HDD) models D18x22 up to D36x50 Series II.

Rock Adaptable Terrain Tool (R.A.T.T.)  ratt1







Radius TRB-3500

With a centre axis cutting design, reinforced secondary crown, improved tungsten carbide placement pattern, recessed water ports, a rear wear pad and knock-out holes, the Radius threaded rock bit has several innovative features that offer contractors an even greater advantage in tough bores. There is a Radius bit for all sizes of HDD rigs from 10K to 200K. Standard API threads allow easy connection to both our popular patent pending "Lock & Load" Sonde Housing and existing sonde housings on the market.

Radius TRB-3500 drillheadTRB-3500

3.5" Rock Bit

2-3/8" API-REG Pin

Rigs 20K – 40K

Approx Hole Size 5-1/2" – 6"

Teeth Part # P1006 – Pointed / Frac Tooth

Teeth Part # P1008 – Domed / Grind Tooth


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Contact Us

FlowTEK HDD UK Limited
Unit 1 Eco Business Park
Eco Way



01302 841936







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Latest News

We have completed 180mm Gravity and 125mm Rising Main in horrendous ground conditions, solid chaulk, where by the ground was so severe we mobilised our Ditch Witch All Terrain to undertake a section of the works. In total Flowtek successfully installed 4.5k at Hillington, Norfolk.

Flowtek have been busy undertaking specialist crossings on the A14 Widening Project.

Flowtek have recently completed 5k x 225mm at Cambridge.




 Company Number: 8261380 VAT Registration Number: 157 0325 26 Registered Office: Unit 1 Eco Business Park, Eco Way, Dunscroft DN7 4JJ