High performance hydraulic rock drill
Doofor DF550L-EXT-2M is a high frequency rock drill equipped with a hydraulic back hammer and two OMS-series rotation motors. The back hammer enables removing stuck drill steels from the rock and opening the threads of lines of drill bars in extension bar drilling. Two motors are optimal in broken or fissured rock conditions or when drilling mixed materials, such as soil or moraine.
The DF550L-EXT-2M has a low overhead of 84 mm from the drill center line. The rock drill has a separated flushing box. Flushing media can be water or air.
A flushing head can be turned upside down. Motor fittings direction can be specified (up, down or side). Accumulator valve direction can be specified. The rock drill is equipped with two OMS-series rotation motors. This enables continuous, a high torque of 1592 Nm and intermittent torque of 1900 Nm while still maintaining a high rotation speed.
Optimal maximum hole diameter for the DF550L-EXT-2M is 76 mm.
|Percussion power||17 kW|
|Percussion pressure||160 bar|
|(oil flow)||(95-120 litres/min)|
|Rotation motors||2*160 cm3|
|Speed max.||250 rpm|
|Torque (2*160 cm3)*||1950 Nm|
|Oil flow *||2*40 litres/min (max. 2*90 litres/min)|
|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|
AIR / WATER
*) Numbers given are for two standard rotation motors (2*160 cm³) at an intermittent pressure of 260 bar [3770psi]. Motor options are 80 cm³, 100 cm³, 125 cm³ and 160 cm³. For professional use only as a component of a hydraulic system.