Throw-away tipped drill.

摘要

A throw-away tipped drill comprises an insert (21) for cutting a workpiece, and a shank (22) to be mounted on a prescribed position of a cutting machine, and the insert (21) is disengageably mechanically connected with the shank (22) The insert (21) is formed of a silicon carbide whisker reinforced alumina sintered body, and the shank (22) is made of steel. Due to this structure, the insert (21) has excellent wear resistance and adhesion resistance, while the shank (22) has sufficient toughness against breakage. Further, the drill requires no resharpening for continuous use.