Hydraulic rock drill DF550L

Hole diameter [mm]

Power class [kW]

Doofor DF550L is a high-frequency hydraulic rock drill specially designed for underground production drilling and tunneling. The DF550L has a very low overhead, only 84 mm from the drill center line. The rotation motor of the DF550L can be installed on the right-hand or the left-hand side.

The rock drill has a separated flushing box. Flushing media can be water or air. It can be equipped with shank adapters (striker bars) R32, R38, T38 and T45. It can also be equipped with stainless steel, separated flushing head for underground mining, bolting and grouting.

The DF550L can be equipped with heat resistant sealing for tap hole drilling.

Optimal maximum hole diameter for the DF550L is 76 mm.

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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 152 kg

*) Numbers given are for standard rotation motor (125 cm³) at an intermittent pressure of 275 bar [3989psi]. Motor options are 80 cm³, 100 cm³, 125 cm³, 160 cm³ and 200cm³ (the 200 cm³ motor can be installed on the left-hand side only).