Machine Stable is an authorized distributor of the DEVELON brand under HD Hyundai.
PRODUCTS DESCRIPTION
The DEVELON DR305H rotary drilling rig is designed for heavy-duty construction projects, offering precision and reliability. Equipped with a Scania engine tuned for high power and fuel efficiency, it pairs with Rexroth hydraulic components for smooth, responsive performance. The fully electric-controlled hydraulic system (FEH) allows fast and accurate drilling operations. Its spacious operator cabin features a high-resolution full-color LCD display, air-conditioned suspension seats, and upgraded sealing and noise reduction, providing comfort and safety during prolonged work. Intelligent drilling modes and one-button soil discharge improve efficiency and reduce operator fatigue.
PRODUCTS DESCRIPTION

TECHNICAL PARAMETER
| Item | Specification |
|---|---|
| Model | DR305H |
| Max Drilling Diameter | 2,500 mm |
| Max Drilling Depth | Kelly Rod: 94 m / Machine Rod: 61 m |
| Power Head Max Torque | 305 kN·m |
| Power Head Speed | 5–23 rpm |
| Pressure System Force | 260 kN |
| Pulling Force | 335 kN |
| Stroke | 6,000 mm |
| Main Winch Lifting Capacity | 340 kN |
| Main Winch Rope Diameter | 36 mm |
| Main Winch Max Speed | 2 m/min |
| Auxiliary Winch Lifting Capacity | 90 kN |
| Auxiliary Winch Rope Diameter | 20 mm |
| Auxiliary Winch Max Speed | 70 m/min |
| Mast Tilt Front/Back | 5° / 90° |
| Mast Tilt Left/Right | +4° |




