| Main parameters | SWDRT250 | SWDRT250H | |
| Drilling method | DTH and roller-bit drilling | Roller bit | |
| Operation parameters | |||
| Diameterof roller-bit drilled hole | mm | 230〜250 | 220〜270 |
| Diameterof DTH drilled hole | m m | 165-200 | — |
| Drillingdepth | m | 48 | 48 |
| Drilling angle (optional) | o | 60 〜90 | 60 〜90 |
| Rock hardness | f4 〜20 | f4 〜20 | |
| Type of bit | DTH and roller bits | Roller bits | |
| Drill pipe diameter | mm | 133、 159、 194 | 194、 219 |
| Drill pipe length | m | 10mX5 | 10mX5 |
| Air com pressor | |||
| Discharge pressure | bar | 25/17 | 7 |
| Air rate | m3/min | 29.8 | 36 |
| Engine power | kW | 328 | 220 (motor) |
| Diesel engine | Dieselengine + motor | ||
| Model | Cummins QSM11-C400 | Cummins QSB7-C187 | |
| Power/rate of rotation | kW/rpm | 298/2100 | 140/2050+110+90 |
| Fueltankvolume | L | 1500 | 400 |
| Propulsion | |||
| Length of drill stand | m | 15 | 15 |
| Propulsion stroke | m | 11.4 | 11.4 |
| Propulsion speed | m/min | 45 | 45 |
| Propulsion | kN | 220 | 290 |
| Axial pressure | kN | 270 | 340 |
| Liftingspeed | m/min | 63 | 63 |
| Travelingcapability | |||
| Traveling speed | km/h | 2 | 2 |
| Gradeability | o | 20 | 20 |
| Ground pressure | kPa | <100 | <100 |
| Slewing | |||
| Rate of rotation | rpm | 0 〜160 | 0—120 |
| Torque | kNm | 11 | 13.8 |
| Power | kW | 110 | 110 |
| Overall dimensions | |||
| Total weight | kg | 55000 | 80000 |
| LXWXH (when the drill stand is level) | m | 17X5.8X7 | 17 X5.8 X 7 |
| LXWXH (when the drill stand is upright) | m | 13X5.8X 17 | 15 X5. X 17 |
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