Abstract: A portable stand supports and positions an inverted power drill relative to an overlying workpiece. The power drill is adjustably positionable both vertically and angularly with respect to the workpiece.

Abstract: A rugged maneuverable articulate mine service vehicle includes a power unit and a utility formed from welded steel plate, which units are interconnected by an articulated joint having a pivot axis and an axis of rotation. Each of the units has a pair of drive wheels with each drive wheel being powered by its own hydraulic motor. The power wheels are directly secured to the respective units. A hydraulic crane is pviotally mounted on the utility unit with the mast of the crane in close proximity to the articulated joint connecting the utility unit to the power unit. Hydraulic steering cylinders are connected between one of the units and the articulated joint and cause relative rotation of one unit of the vehicle about the pivot axis of the joint with respect to the other to steer the vehicle. Hydraulic outriggers are located at opposite corners of the front of the utility unit.