DR. JOHN A HAUGEN, M.D.
Marriage and Family Therapists at Park Nicollet Blvd, Minneapolis, MN

4982489, Jan 8, 1991

Oct 23, 1989

7/425544

John M. Haugen - Minneapolis MN

Honeywell Inc. - Minneapolis MN

B23B 4902

2940201

A tool set for gauging and repairing concentricity of a workpiece bore axial section with the pitch diameter of the internal threads in the bore includes a gauge sleeve, a gauge rod, a reamer, and a stop collar. For gauging concentricity of the internal threads with the axial section, the sleeve is first inserted within the bore and threaded into a concentric relationship with the bore internal threads, and, then, the rod is inserted through the sleeve. The rod has an inner end which can extend from the sleeve and within the bore axial section such that the rod inner end will extend through a predetermined distance if the axial section of the bore is concentric with the sleeve and thus with the pitch diameter of the internal threads within the bore. If an eccentric relationship is found to exist between the internal threads and the bore axial section, then, after the rod is withdrawn from the sleeve, the reamer is inserted through the sleeve and rotated to remove material from the workpiece at the axial section unitl a relationship of concentricity is restored between the internal threads and the axial section of the bore. The reamer has an inner end with working elements thereon capable of removing material from the workpiece within the axial section upon rotation of the reamer.