High precision cutting tools

A cutting tool for removing material from a work piece and forming a highly polished finished surface on the work piece, comprising:

• a body having a driver engaging end and an opposite work engaging end, the body having a side surface and being adapted for rotation in a predetermined direction about an axis relative to the work piece when working;
• a cutting tooth formed on the work engaging end, the cutting tooth including a cutting edge extending in a transverse direction to the axis and a guide projection extending a projection distance beyond the side surface of the body and laterally of the axis;
• the cutting edge having first and second ends, the first end being nearer to the axis and the second end being nearer to the side surface of the body;
• the guide projection having a guide face that is concentric with the axis and intersects the cutting edge to form a sharp corner;
• and
• the cutting tooth tapering from and thereby providing relief for the guide face in a direction rearwardly of the guide face and inwardly toward the side surface of the body so that, in rotation of the cutting tool relative to and in engagement against the work piece, no portion of the cutting tooth other than the guide face contacts the surface of the work piece to prevent scoring of the finished surface of the work piece by the surface of the body as the cutting tool advances into the work piece to remove material from it;
• whereby the cutting edge transfers to the material removed most of the heat generated to provide a highly polished finished surface on the work piece.