Patent ID: 9550223
Date: 2017-01-24
CPC Classifications: B21D

Claim:
1. A rotary insert comprising: a shank portion; a stopper portion coupled to the shank portion; and a tip opposite the shank portion, the tip having a base coupled to the stopper portion, the tip extending away from the stopper portion along an axis of symmetry, the tip having a tip end spaced apart from the stopper portion, the tip comprising a first face disposed opposite a second face, the first face and the second face defining a continuous outer edge, the continuous outer edge extending from the tip end to the base; the continuous outer edge intersecting the axis of symmetry at the tip end; the outer edge having a maximum radius relative to the axis of symmetry at the base, the continuous outer edge from the tip end to the base tapering outward relative to the axis of symmetry; from the tip end to the base the tip having at least one stage portion, the continuous outer edge curved in the at least one stage portion; and the stopper portion having a stopper radius greater than the maximum radius of the tip.