| Parameter | HW-350S (6.6m Mast) | HW-350S (3.6m Mast) |
| Model | HW-350S | HW-350S |
| Mast Height | 6.6 meters | 3.6 meters |
| Engine Brand | Yuchai Power | Yuchai Power |
| Power | 91 kW | 91 kW |
| Main Pump | — | — |
| Max Drilling Depth | 350 m | 350 m |
| Drilling Diameter | 105–305 mm | 105–305 mm |
| Working Air Pressure | 1.2–3.5 MPa | 1.2–3.5 MPa |
| Air Consumption | 16–55 m³/min | 16–55 m³/min |
| Drill Rod Length | 3 m / 6 m | 3 m |
| Drill Rod Diameter | Φ89 / Φ102 | Φ89 / Φ102 |
| Lifting Force | 3 t Lifting capacity 16t | 3 t Lifting capacity 16 t |
| Slow Lifting Speed | — | — |
| Fast Lifting Speed | 30–55 m/min | 30–55 m/min |
| Rotary Torque | 8500 / 4250 N·m | 8500 / 4250 N·m |
| Rotary Speed | 0–80 r/min; 0–160 r/min | 0–80 r/min; 0–160 r/min |
| Drilling Efficiency | 10–35 m/h | 10–35 m/h |
| Travel Speed | 2.5 m | 2.5 m |
| Climbing Ability | 21° | 21° |
| Machine Weight | 7.5 t | 7.5 t |
| Dimensions (L×W×H) | 5.78 × 1.7 × 2.25 m | 5.78 × 1.7 × 2.25 m |
| Applicable Strata | Loose layers and bedrock | Loose layers and bedrock |
| Drilling Method | Down-the-hole (DTH) hammer | Down-the-hole (DTH) hammer |
| Equipped Hammer | High air pressure series | High air pressure series |
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