Designed to endure
demanding environments



High-performance hydraulic rock drill

Doofor DF550L is a high-frequency hydraulic rock drill specially designed for underground production drilling and tunneling. The DF550L has a very low overhead, only 84mm from the drill center line. The rotation motor of the DF550L can be installed on the right-hand or the left-hand side.

The rock drill has a separated flushing box. Flushing media can be water or air. It can be equipped with shank adapters (striker bars) R32, R38, T38 and T45. It can also be equipped with stainless steel, separated flushing head for underground mining, bolting and grouting.

Optimal maximum hole diameter for the DF550L is 76mm.

Technical Data
Percussion power 17 kW
Percussion pressure 160 bar
(oil flow) (90-120 litres/min)
Rotation motor* 125 cm3
Speed max. 250 rpm
Torque* 796 Nm
Oil flow max.* 51 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 152 kg

76 mm

Optimal maximum
hole diameter

17 kW

Power class

R32, R38
T38, T45

Shank size



Feed force (pressure) must be adjustable during operation
*) Numbers given are for standard rotation motor (125cm³) at an intermittent pressure of 275bar [3989psi]. Motor options are 80cm³, 100cm³, 125cm³ and 200cm³ (right hand side installation). Also 160cm³ can be insalled to both sides.

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.

©2019 Doofor Inc