Integral boring and threading tool and method

Details Integral boring and threading tool and method Integral boring and threading tool and method

1995-09-05

1997-10-21

Howell, Daniel W.

Gear cutting, milling, or planing

Milling

Thread or helix generating

408222, 409 74, 470199, B23G 132, B23G 520

Patent

active

056789629

ABSTRACT:
A unitary bore forming and threading tool for producing a variety threaded bores having chamfers and counterbores without a need for tool changes. The improved took preferably includes a shaft of predetermined axial length and having proximal and distal ends, a shank located adjacent the proximal end, a holemaking element located adjacent the distal end, and a threadmill portion located axially between the bit and the shank. The holemaking element further includes a chamfering surface and an end cutting surface. The disclosed tool and method enable creation of a variety of bores such as chamfers, counterbores, and threaded bores by producing bore portions of selectively determined distinct diameters by sequentially axially feeding the tool into the workpiece along distinct tool paths without changing tools. If desired, one or more of the bore portions can be threaded with the threadmill by moving the threadmill in a selectively determined helical or nonhelical path.

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