Method of repairing damaged keyway

Abstract

A simple, cost effective method is provided for repairing damaged and misshapen keyways in shafts and like parts. An insert formed of carbon or other nonmetallic material which retains its shape when subjected to welding temperatures and which will not bond to weld material is provided having length and width dimensions corresponding to the final desired configuration of the restored keyway. The insert is then placed into the damaged keyway and the free space between the defining walls of the damaged keyway and the insert is filled with weld material. Excess weld and insert material above the surface of the shaft adjacent to the keyway is next machined to present a smooth, finished surface. The final step of the method involves removal of the insert from the keyway by striking the shaft or like part against an appropriate surface in order to dislodge the insert. This method effects the repair of damaged keyways without special equipment or the need for skilled workmen. The method also allows for the repair of damaged keyways in parts which heretofore could not be economically restored.

Dependencies are inferred from the claim text.