摘要 |
A cutting tool having spaced elongate teeth. The tool facilitates 1) the removal of cut particles from the surface to be cut thereby enabling efficient cutting particularly of deeper holes; 2) the removal of the center cut out portion from the cutting too. The tool comprises: a pilot drill bit (22); an anchoring disk (24) fixed to and around a rear central portion of the drill bit; a plurality of peripherally paced elongate teeth (26) each having a rear end portion held in the anchoring disk (24), and a front end portion having a cutting edge (28); a sliding guide disk (30) slidably positioned around the drill bit (22) and in front of the anchoring disk (24) so that the elongate teeth (26) are radially positioned thereby; bias means (32) to bias the sliding guide disk in a foward position; and, retention means (34) to prevent the guide disk from sliding forwardly on the pilot drill bit beyond the cutting edges of the teeth. |