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Doofor DF550S is a high-frequency hydraulic rock drill specially designed for surface production drilling and general tunnel work. The rotation motor of the DF550S is installed on the top side of the rock drill. The rock drill has a separated flushing box. Flushing media can be water or air. Flushing parts are available in brass or in stainless steel to avoid corrosion caused by saline water.
Optimal maximum hole diameter for the DF550S is 76 mm [3”].
76 MM
17 KW
R38, T38, T45
AIR/WATER
| Nominal power class | 17 kW |
| Percussion pressure | 160 bar |
| (Percussion oil-flow) | (90-120 litres/min) |
| Rotation motor* | 125 cm3 |
| Speed max. | 250 rpm |
| Torque* | 796 Nm |
| Oil flow* | 40 litres/min (max 90 litres/min) |
| Gear ratio | 65/40 |
| Lubrication | Air-oil mist, min. 200 g/h |
| Flushing air pressure. | 5-7 bar |
| Flushing air flow | 4000 litres/min |
| Flushing water flow | 150 litres/min |
| Weight | 178 kg |
*) Motor options are 125 cm³, 160 cm³ and 200 cm³. Number given is for standard rotation motor (125 cm³) at an intermittent pressure of 275 bar [3989psi].
**) Number given is for standard rotation motor (125 cm³) at an operating pressure of 175 bar [2466psi].