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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. It is characterized by high air pressure and high efficiency, suitable for areas with abundant air supply. The working principle uses compressed air to drive the piston to reciprocate in the cylinder, generating impact energy to impact the drill bit into the rock formation.
| Type | Model | Length (mm) | Weight (kg) | Ext. Dia (mm) | Hole Range (mm) |
|---|---|---|---|---|---|
| 3.5 inch | DHD3.5 | 930 | 25 | Φ82 | Φ90-110 |
| 4 inch | DHD340 | 1030 | 39 | Φ99 | Φ110-135 |
| SD4 | 1084 | 40.5 | Φ99 | ||
| QL4 | 1097 | 41 | Φ99 | ||
| Mission40 | 1005 | 40 | Φ99 | ||
| 5 inch | DHD350 | 1214 | 76.5 | Φ125 | Φ135-155 |
| SD5 | 1175 | 72.5 | Φ125 | ||
| QL5 | 1147 | 73 | Φ125 | ||
| Mission50 | 1110 | 68.5 | Φ125 | ||
| 6 inch | DHD360 | 1248 | 100 | Φ142 | Φ155-190 |
| SD6 | 1261 | 100 | Φ142 | ||
| QL6 | 1212 | 95 | Φ146 | ||
| Mission60 | 1161 | 90 | Φ146 | ||
| 8 inch | D85 | 1492 | 188 | Φ180 | Φ195-254 |
| SD8 | 1463 | 192 | Φ180 | ||
| QL8 | 1465 | 182 | Φ180 | ||
| Mission80 | 1338 | 176 | Φ180 |







