Abstract: A machine and a tool for cutting material such as wood and plastics. The tool includes a shank adapted to be fastened to and rotated by a power driven spindle. The tool further includes a cutting part having at least one spiral rib on its outer periphery. The outer periphery of the rib is sharpened on its edge which is adjacent the shank, and the spiral rib has a pitch in the range of approximately 5.degree. to 15.degree.. The machine includes the tool, a drive motor and the spindle, and a support table for supporting a workpiece. The table has an opening formed in it and the tool extends through the opening. The sharpened edge of the rib is adjacent the table.