Doofor DF550L-BLT is a rock drill equipped with multiple sealing and hermetic rotation mechanism for demanding underground conditions. The stainless steel BLT-flushing head can be turned upside down. Rotation motor can be placed on the left or right. Motor fitting direction can be specified (up, down or side).
Doofor DF550L-BLT 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.
Optimal maximum hole diameter for the DF550L is 76mm.
|Percussion power||17 kW|
|Percussion pressure||160 bar|
|(oil flow)||(95-120 litres/min)|
|Rotation motors||80-250 cm3|
|Speed max.||250 rpm|
|Torque (125cm3)||796 Nm|
|Oil flow max.*||95–120 litres/min|
|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|
Feed force (pressure) must be adjustable during operation
*) Numbers given are for standard rotation motor (200cm3) at an intermittent pressure of 275bar [3989psi]. Motor options are 80cm³, 100cm³, 125cm³, 160cm³, 200cm³, 250cm³. For professional use only as a component of a hydraulic system.