Doofor Rock Drills - Products - DF751 drifter [HYDRAULIC ROCK DRILL]

Doofor DF751 hydraulic rock drill

Doofor DF751 is a hydraulic rock drill for general excavations and underground production drilling . The Doofor DF751 is equipped with a separate side flushing box and a back hammer, that enables directing the blow energy upwards to remove stuck drill steels from the rock.

Drill hole flushing can be done with air or with water. The required air- or water flow depends on the diameter of the hole.

Doofor DF751 –rock drill can be used with 51mm (2”) drill steels with an equivalent hole size is 102mm (maximum 127mm).

The rock drill can be equipped with a T51 –shank adapter.

percussion power class kW	30
percussion oil flow l/min	130-170
percussion pressure bar	140-180
rotation speed RPM	80-180
rotation torque* Nm	1200 (max. 1440)
rotation oil flow** l/min	45-100
shank lubrication air l/min	200-300
flushing air pressure bar	5-8
flushing air volume*** l/min	6000
recommended flushing water l/min	200
weight kg	230

DOWNLOAD TECHNICAL SPECIFICATION [PDF-file]

Numbers given are for standard rotation motor (250cm3³) at a peak pressure of 155bar. Motor options are 80cm³, 100cm³ ja 125cm³, 160cm³, 200cm³, 250cm³ and 315cm³ .

**) Oil flow should follow the percussion oil flow so that bit will turn 12 - 15º / blow.

***) Note: To maintain a minimum chip removal speed of 15m/s with bit dia of 4 1/2" and rod dia of 1 3/4" the flushing air volume of 7800litres/minute (275cfm) is required.

Doofor DF751 rock drill installed on a drill rig built by Gemsa Ltd., Istanbul.