The Doofor DF550L Rock Drill is a High-Frequency Hydraulic Rock Drill especially designed for Underground Production Drilling and Tunneling.
The Doofor DF550L has a very low overhead, only 84 mm from the drill center line.
The DF550L rotation motor can be installed on the right-hand or the left-hand side.
The Rock Drill has a separated flushing box.
The flushing media can be water or air.  The Df550L can be equipped with shank adapters (striker bars) R32, R38, T38 and T45. It can also be equipped with a stainless steel, separated flushing head for Underground Mining, Bolting and Grouting.
The DF550L can be equipped with heat resistant sealing for tap hole drilling.
Optimal maximum hole diameter for the DF550L is 76 mm.
 
SUITABLE APPLICATIONS:
Surface, Underground
 
 
TECHNICAL SPECIFICATIONS:
Nominal power class
17 kW
Percussion pressure
160 bar
(Percussion oil-flow)
(90-120 litres/min)
Rotation motor*
125 cm3
Speed max.
250 rpm
Torque*
796 Nm
Oil flow*
40 litres/min (max 90 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
*) Motor options are 80 cm³, 100 cm³, 125 cm³, 160 cm³ and 200 cm³ (left-hand side only). Number given is for standard rotation motor (125 cm³) at an intermittent pressure of 275 bar [3989psi].
**) Number given is for standard rotation motor (125 cm³) at an operating pressure of 175 bar [2466psi].
The product is for professional use only, as a component of a hydraulic system.
 
NOTE: The feed force (pressure) must be adjustable during operation.
The rotation torque and oil flow values given are for a typical rotation motor.
See the full brochure for detailed information on different rotation motors.
The 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.