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DRILLING TOOLS · CONTINUOUS FLIGHT AUGERS
DTH hammer CFA rod
Flight auger rod with a central pipe for a down-the-hole hammer: percussion at the bit, continuous spoil removal by the flights.
| Size | DiameterD · mm | PitchP · mm | Flight thicknessT · mm | Inner pipe diameterD1 · mm | LengthL · m |
|---|---|---|---|---|---|
| Φ300 | 280 | 280 | 16 | 75 | 2~10 |
| Φ400 | 380 | 300 | 16 | 75 | 2~10 |
| Φ500 | 480 | 350 | 16 | 75 | 2~10 |
| Φ600 | 580 | 400 | 20 | 75 | 2~10 |
| Φ700 | 680 | 400 | 20 | 75 | 2~10 |
| Φ800 | 780 | 500 | 20 | 75 | 2~10 |
| Φ900 | 880 | 500 | 25 | 75 | 2~10 |
| Φ1000 | 980 | 600 | 25 | 75 | 2~10 |
8 catalogue sizes from Φ280 to Φ980 mm, each with pitch, flight thickness and inner pipe diameter. Catalogue values; dimensions in mm unless stated. Other sizes on request.
Overview
The hammer breaks rock and hard layers at the bottom of the hole while the flights carry the cuttings up. The table gives the inner diameter of the central pipe for each size.
Applications
How to order
To order, give us the auger diameter, the rod length and the drive-head connection on your rig. We reply by email within one business day.