Tungsten Carbide Double Heel DTH Hammer is double casing system casing crown bit and percussion bit, double head rotary percussive casingsystem utilizes a rotary head to drive the outer casing equipped with atungsten carbide crown and a hydraulic drifter to drive the inner drill stringe quipped with a percussive drill bit. This is an excellent method for drilling straight holes in varying ground conditions. The water and compressed air canbe both provided as power.
It can be widely used in drilling for grouting holes in project such as cofferdam,foundation and geothermal well and etc.
Product Parameter
| 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 |
| SD4 | 1084 | 40.5 | Φ99 |
| QL4 | 1097 | 41 | Φ99 |
| Mission 40 | 1005 | 40 | Φ99 |
| 5 inch | DHD350 | 1214 | 76.5 | Φ125 | Φ135-155 |
| SD5 | 1175 | 72.5 | Φ125 |
| QL5 | 1147 | 73 | Φ125 |
| Mission 50 | 1110 | 68.5 | Φ125 | Φ155-190 |
| 6 inch | DHD360 | 1248 | 100 | Φ142 |
| SD6 | 1261 | 100 | Φ142 |
| QL6 | 1212
| 95
| Φ146 |
| Mission60 | 1161 | 90 | Φ146 | Φ195-254 |
| 8 inch | D85 | 1492 | 188 | Φ180 |
| SD8 | 1463 | 192 | Φ180 |
| QL 8 | 1465 | 182 | Φ180 |
| Mission 60 | 1338 | 176 | Φ180 | Φ254-311 |
| 10 inch | SD10 | 1502 | 290 | Φ226 |
| Numa 100 | 1510 | 288 | Φ226 |
| 12 inch | DHD 1120 | All can be designed according to your requests! |
| Numa120 |
| Numa 125 |
