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The high air pressure DTH (Down-The-Hole) hammer is an advanced percussive drilling tool designed for rock formation. Driven by compressed air, the piston reciprocates in the cylinder to generate high impact energy, making it ideal for mining, quarrying, and construction.
| Type | Model | Length (mm) | Weight (kg) | External Dia.(mm) | Hole Range (mm) |
|---|---|---|---|---|---|
| 3.5 inch | DHD3.5 | 930 | 25 | Φ82 | Φ90-110 |
| 4 inch | DHD340 | 1030 | 39 | Φ99 | Φ110-135 |
| 5 inch | DHD350 | 1214 | 76.5 | Φ125 | Φ135-155 |
| 6 inch | DHD360 | 1248 | 100 | Φ142 | Φ155-190 |
| 8 inch | D85 | 1492 | 188 | Φ180 | Φ195-254 |
| 10 inch | NUMA100 | 1510 | 288 | Φ226 | Φ254-311 |
| Hammer Length (without bit) | 1432 mm |
| Top Sub Thread | API 5 1/2" REG PIN |
| Working Pressure | 15-33 Bar |
| Air Consumption | 40-60 M³/min |
| Bit Shank | NUMA100 |








Products are typically packed in robust wooden cases. Sample orders are suggested via courier express (DHL/UPS/TNT), while bulk orders are recommended via air or sea freight.