Cutting by use of rotating axially moving tool – Tool or tool with support – Having stepped cutting edges
Patent
1992-04-21
1993-04-13
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having stepped cutting edges
408229, B23B 5102
Patent
active
052016161
ABSTRACT:
A hole reamer takes a rough, undersized hole to final size while providing better correction of any initial axial mislocation of the hole. A pair of cutting sections, a smaller diameter lead cutting section and a larger diameter trailing cutting section, are axially separated by a relieved section of smaller diameter. The relieved section is small enough in diameter that it does not make contact with the hole, and is longer axially than the hole is thick. When the lead section enters the hole, it is bent off axis slightly, but the reamer shifts back on axis when the relieved section enters the hole. Thus, the trailing, final hole sizing section is back on axis as it works to finish the hole, bringing it closer to the desired axial location.
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patent: 4844670 (1989-07-01), Heule
General Motors Corporation
Griffin Patrick M.
Howell Daniel W.
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