Abstract: A drill having a cutting edge that is less prone to chipping or fracturing when used in drilling operations, and that can be sharpened or resharpened uniformly and consistently from drill to drill by machine grinding. The drill comprises a body and at least one flute formed in the body that terminates in a cutting edge at the cutting end of the drill. The flute has a cutting surface, the cutting surface having formed therein a dub face having a substantially planar surface over at least a portion thereof that is proximate to the cutting edge. The cutting edge has formed therein a cutting land having a substantially planar surface over at least a portion thereof connected at an edge to the planar surface portion of the dub face.

Abstract: A method for repositioning or repairing holes in metal substrates such as metal components used in jet engines and the like. The hole to be repositioned or repaired is enlarged and a recess is formed at each end of the enlarged hole. A deformable metal insert is then inserted within the enlarged hole and then subjected to physical forces so as to cause it to deform and frictionally engage the walls of the recesses and the enlarged hole so that the insert becomes axially fixed therein. A new, repositioned hole can then be formed in the fixed insert that extends completely therethrough.