PORTABLE POWER ROTARY DEVICE PROVIDED WITH DRILL HAVING EARTHWORK AND CUT-OFF FUNCTIONS

A rotary device having mounted therein a drill for soil earthwork. The drill includes a shaft and a screw, formed along the outer circumferential surface of the shaft, for earthwork and the transportation of displaced soil. A rotary shaft is formed on the upper part of the shaft. A fixed shaft part is formed on the lower part of the shaft, for being inserted and rotated into the soil. A pair of horizontal blades face each other on the connection part between the shaft and the fixed shaft part. Cutting blades, which are symmetrical with each other, incline downwardly on the pair of horizontal blades. Vertical blades protrude vertically on the upper portion of the lower wing of the screw and, when performing earthwork, soil and tree roots are cut by the cutting blades, and soil lumps, transferred along the screw, are cut again by the vertical blades.