421TA Φ90-127mm Integrated Dth Surface Blasting Hole Drill Rig Rock Drilling Machine
This model is equipped with a larger two-stage screw air end, designed to meet the requirements for an optimal hole diameter range of 90–115 mm. When drilling 90 mm diameter holes, the engine operates at 1450 RPM—this optimal economic speed ensures extremely low fuel consumption. Moreover, it is a lightweight and flexible model with excellent off-road capability, allowing it to adapt to operations in narrow spaces and rough terrain. It can also be loaded into a 20-foot container, effectively reducing transportation costs.
Optimal Hole Range: φ90-127
Hole depth.Max: 21m
| Weight | 7,560 kg |
| Dimensions (LxWxH) | 7,480×2,300×2,750 mm |
| IChina IV engine (standard) | Yuchai/162 kW |
| Rotation torque(MAX) | 1,500 Nm |
| Drilling hole diameter | φ90-127 mm |
| DTH hammer(Standard) | 3.5”(inch) |
| Drilling rod(Standard) | φ60×3,000 mm |
| Diesel tank volume | 250 L |
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