The Atlas Copco DML is a crawler mounted, hydraulic tophead drive, multi-pass rotary drilling rig specifically designed for production blasthole drilling to depths of 175 ft (53.3 m) with a 30 ft pipe change and 205 ft (62.5 m) with the optional 35 ft (10.7 m) pipe change. Various carousel capacities are available for both the standard 30 ft (9.15 m) and the optional 35 ft (10.7 m) tower. Feed pressure generates a weight on bit force of up to 60,000 lbf (267 kN). There is also an optional angle drilling package that allows the tower to be positioned up to 30 degrees from the vertical position.
|Hole diameter||5 27/32 - 10 5/8 inch (149 - 270 mm)|
|Weight on bit||60000 lb (27200 kg)|
|Estimated weight||87000 - 110000 lb (39.5 - 50 t)|
|Maximum hole depth||175 ft (53.5 m)|
|Single pass depth||27.4 ft (8.5 m)|
|Drilling method||Rotary and DTH - Multi pass|