“The DM45/50 is a crawler-mounted, hydraulic tophead-drive rig that is suitable for a variety of multi-pass rotary and DTH drilling applications. They feature a 30 ft (9.1 m) drill pipe change and a standard 5-rod carousel. With one rod under the rotary head, these units have a total clean depth capacity of 175 ft (53.3 m).
Feed pressure generates a pulldown of up to 45,000 lbf (200 kN) for the DM45 and up to 50,000 lbf (222 kN) for the DM50. Both units utilize a diesel engine to drive the air compressor and hydraulic system.
The powerful rotary tricone and DTH hammer drills deliver a hole diameter of 5 1/2 in – 8 7/8 in 140 mm – 225 mm) and can achieve a clean hole depth of 27.5 ft (8.4 m) in single-pass applications or depths of up to 175 ft (53.3 m) for multi-pass applications.”