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 84mm from the drill center line. The rock drill has a separated flushing box. Flushing media can be water or air.
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, high torque (1592Nm) while still maintaining a high rotation speed.
Optimal maximum hole diameter for the DF550L-EXT-2M is 76mm.
|Percussion power||17 kW|
|Percussion pressure||160 bar|
|(oil flow)||(95-120 litres/min)|
|Rotation motors||80-200 cm3|
|Speed max.||250 rpm|
|Torque (2*125 cm3)||1592 Nm|
|Oil flow max.*||95–120 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|
Feed force (pressure) must be adjustable during operation
*) For professional use only as a component of a hydraulic system.