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High air pressure DTH hammer is a kind of down-the-hole hammer mainly used for percussive drilling in rock formation. Characterized by high air pressure and superior efficiency, it utilizes compressed air to drive the piston in a reciprocating motion within the cylinder. This generates impact energy to impact the drill bit, enabling rapid penetration into various rock formations.
| 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/SD4/QL4 | 1005-1097 | 39-41 | Φ99 | Φ110-135 |
| 5 inch | DHD350/SD5/QL5 | 1110-1214 | 68-76.5 | Φ125 | Φ135-155 |
| 6 inch | DHD360/SD6/QL6 | 1161-1261 | 90-100 | Φ142-146 | Φ155-190 |
| 8 inch | D85/SD8/QL8 | 1338-1492 | 176-192 | Φ180 | Φ195-254 |
| Hammer Length (without bit) | 1155 mm |
| Top Sub Thread | API 3 1/2" REG PIN |
| Outside Diameter | 148 mm |
| Weight | 102 KG |
| Bit Diameter Range | 158-203 mm |
| Working Pressure | 12-27 Bar |
| Air Consumption | 16-23 M3/min |
| Bit Shank | QL60A |








