* Fast penetration results from the air piston blows transmitted directly to the DTH hammer, so practically no energy is wasted in rock breaking and the behavior of repeated breaking is reduced significantly.
* Then, broken scrap rock will drop into mud and be discharged though pump by the form of reverse circulation.
* The rotary drilling of the down the hole hammer can create efficiently flushing and clean holes in a short time.
* The DTH hammer is by far the most versatile and can be used very successfully in a wide range of ground conditions from soft, through medium to very hard.
Parameters of FC series Down The Hole Hammer:
| Model | FGC-6 | FGC-10 | FGC-15 |
| Bore diameter (mm) | Φ330-Φ600 | Φ600-Φ1000 | Φ800-Φ1500 |
| Kelly (mm) | 205×205×3750 | 205×205×3750 | 230×230×3800 |
| Drill pipe (mm) | SHB127/89 SHB140/89 | ф180×15×3000 | Φ194×20×3000 |
| Size (mm) | ф320×1549 | ф500×1624 | Φ705×1963 |
| Percussion power(J) | 1800-2200 | 1550-4000 | 3000-12000 |
| Percussion times (min-1) | 960-1200 | 550-800 | 250-450 |
| Air consumption (m3/mim) | 20-30 | 20-40 | 20-60 |
| Air pressure (MPa) | 1.0-1.2 | 0.5-1.2 | 0.5-0.8 |
| Inner bore diameter (mm) | ф89 | ф150 | ф150 |
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