Designed to endure
demanding enviroments


Doofor DF550L-BLT-2M hydraulic rock drill

High-performance hydraulic rock drill

Doofor DF550L-BLT-2M is a hydraulic rock drill equipped with two rotation motors and multiple sealing and hermetic rotation mechanism for demanding underground conditions. Two rotation motors enable continuous, high torque while maintaining high rotation speed. The stainless steel BLT-flushing head can be turned upside down. Motor fitting direction can be specified (up, down or side).

Doofor DF550L-BLT-2M is a high-frequency hydraulic rock drill specially designed for ground stabilization and general excavations. The drifter has a very low overhead, only 84 mm from the drill center line.

The rock drill has a separated, non-corrosive flushing box. Flushing media can be water, air or grout (limitations apply). The rock drill can be equipped with shank adapters (striker bars) R32, R38, T38, and T45.

Optimal maximum hole diameter for the DF550L is 76 mm.

Technical Data
Nominal power class17 kW
Percussion pressure160 bar
(Percussion 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)
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
Weight198 kg

76 mm

Optimal maximum
hole diameter

17 kW

Power class

R32, R38
T38, T45

Shank size



*) 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.

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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