Designed to endure
demanding enviroments


Doofor hydraulic rock drill DF540L-EXT-2M
High-performance hydraulic rock drill

Doofor DF540L-EXT-2M is a hydraulic rock drill in the 14kW size class and it has a hydraulic extractor function and two OMS-type rotation motors. Motor displacement can vary between 80 cm³ to 160 cm³. Two rotation motors offer a consistent torque and yet a high rotation speed necessary for successful high-frequency rock drilling. It is designed for general excavations, underground production drilling and bolting.

The DF540L-EXT-2M has a low overhead, which makes it a good underground and limited access drifter and a patented percussion valve for optimal flow-power ratio.

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
Nominal power class14 kW
Percussion pressure140 bar
(Percussion oil-flow)(90 litres/min)
Rotation motors2*125 cm3
Speed max.250 rpm
Torque*1592 Nm
Oil flow*2*40 litres/min (max. 2*90 litres/min)
Gear ratio65/40
LubricationAir-oil mist, min. 200 g/h
Flushing air pressure5–7 bar
Flushing air flow4000 litres/min
Flushing water flow150 litres/min
Weight162 kg

64 mm

Optimal maximum
hole diameter

14 kW

Power class

R32, R38, T38

Shank size



*) Numbers given are for two standard rotation motors (2*125 cm³) at an intermittent pressure of 275 bar [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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