Patent ID: 8602697

Claim:
A method for performing a machining operation on a workpiece having an elongated, recessed region, the method comprising: fitting a collar on a tool by heating the collar to a higher temperature than the tool, placing an unsupported region of the tool through an inner cylinder of the collar, and allowing the collar to cool and firmly fit the tool, the collar having a surface that tapers from a second end to a first end, the tool and the collar having an elongated configuration; positioning the tool having the collar relative to a machining area on the workpiece, the machining area being the elongated, recessed region, wherein the tool and the collar enter the elongated, recessed region, the collar positioned to reduce vibrations of the tool during the machining operation; and rotating the tool to perform the machining operation, a length and an outer diameter of the collar configured to shorten an unsupported length of the tool thereby reducing vibrations of the tool during the machining operation.