Segmented orbital drill
AssigneeKennametal Inc.
InventorKaren Anne Craig
Life of this patent
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Abstract
A segmented orbital drill includes a segmented portion with a semi-finishing cutting portion and a plurality of finishing cutting portions. The semi-finishing cutting portion and finishing cutting portions are separated by grooves formed by a front wall and a rear wall. The segmented portion allows for a fresh cutting edge (i.e., rear wall of the groove) to be revealed as the orbital drill wears in the axial direction. The segmented portion also causes less contact with the workpiece, which reduces power consumption and minimizes deflection of the orbital drill. The segmented orbital drill also includes an optional pilot at one end of the drill, and a clearance neck portion between a shank and the segmented portion. A method of machining a workpiece using the segmented orbital drill is also disclosed.
Claims7
A segmented orbital drill, comprising:
- a segmented portion including a semi-finishing cutting portion and a plurality of finishing cutting portions, the semi-finishing cutting portion having a diameter that is different than a diameter of the plurality of finishing cutting portions;
- a clearance neck portion between the segmented portion and a shank;
- a pilot between the segmented portion and an end of the segmented orbital drill;
- and
- an undercut between the pilot and the segmented portion,
- wherein the pilot has a diameter smaller than the diameter of the segmented portion.
Dependencies are inferred from the claim text.