Designed to endure
demanding enviroments

DF540L-EXT

Doofor DF540L-EXT hydraulic rock drill
High performance hydraulic rock drill

Doofor DF540L-EXT is a hydraulic rock drill in the 14kW size class and it has a hydraulic extractor function. It is designed for general excavations, underground production drilling and bolting.

The DF540L-EXT has a low overhead, which makes it a good underground and limited access drifter and a patented percussion valve for optimal flow-power ratio. The rotation motor of the DF540L-EXT can be installed on the right-hand or the left-hand side. The drifter is completely horizontally symmetric so that it can be installed in a variety of positions.

Flushing media can be water or air. The rock drill can be equipped with male R32, R38 and T38 shank adapters (striker bars).

Technical Data
Metric
Percussion power 14 kW
Percussion pressure 140 bar
(oil flow) (90 litres/min)
Rotation motor* 80 cm3
Speed max. 250 rpm
Torque* 504 Nm
Oil flow* 40 litres/min (max. 80 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 159 kg

64 mm

Optimal maximum
hole diameter

14 kW

Power class

R32, R38, T38

Shank size

AIR / WATER

Flushing

*) Numbers given are for standard rotation motor (80cm³) at an intermittent pressure of 275bar [3989psi]. Motor options are 80 cm³, 100 cm³, 125 cm³, 160 cm³, 200 cm³, 250 cm³. For professional use only as a component of a hydraulic system.

Feed force (pressure) must be adjustable during operation. Rotation torque and oil flow values given are for a typical rotation motor. See full brochure for detailed information on different rotation motors. Percussion pressure mentioned is a recommended value for a typical application. The product is intended for professional use by skilled personnel. Doofor reserves all rights for changes without prior notice.

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