The crawler drill rig AN 140 has been developed in particular for drilling applications with doublehead systems and rod changer.

The machine frame houses a robust 191 hp liquid-cooled Deutz diesel engine BF 6M 1013 C with latest turbocharger and intake-air cooling system. This power unit features an eco-friendly fuel-saving EMR (electronic engine control) speed governor which means no exhaust-smoke discharge when load changing. The emission values correspond to the standards of European COM2 and EPA2 US Stage 2 off-highway regulations.

The hydraulic unit operates on the load-sensing principle and can run on biologically degradable fluids.

The sufficient engine power ensures that the drill heads can work always at their maximum capacity.

The drill mast on the AN 140 is designed with a hydraulic motor feed system. The feed and retraction forces are up to 80 kN. Optionally a drill mast with cylinder feed can be supplied. A new type of patented rod/ casing magazine KBM allows the drill string to be fitted and removed quickly and safely. The magazine can hold as many as 7 double rod units comprising 118 inch long sections of inner rods 3.00 inch and outer casings up to 5.24 inch in diameter.

Subject to revision without notice © 2004 deilmann-haniel mining systems gmbh The drill strings are lifted from the magazine racks by a hydraulic manipulator, which then swings them into the drilling axis. The same procedure is applied for drill string removal, with the manipulator returning the inner rods and outer casings to their racks.

For overburden drilling, as used for example for anchor jobs, the inner string is detached first and replaced in the rack. After the anchors have been inserted in their holes the outer casings are placed back into the racking system over the inner rods. The sections are then ready for the next twin-rod drilling phase. A time-consuming part of the working cycle is eliminated and the overall drilling time is significantly reduced.