Patent ID: 9415450
Filing Date: 2016-08-16
CPC Classification: B23B,Y10T

Claim Text:
1. A tool head comprising: an ovoid element disposed about a center axis; at least two chip grooves formed in the ovoid element; a number of major cutting edges, each major cutting edge disposed in a convex course along a respective chip groove of the at least two chip grooves, the major cutting edges defining with their radially outermost region a nominal diameter; and a shank region; wherein a radial distance from each major cutting edge to the center axis in a front, tip-side, arc portion increases up to the nominal diameter and in a rear, shank-side, arc portion decreases back down to a minimum diameter; wherein the rear arc portion has a radius of curvature smaller than a radius of curvature of the front arc portion; and wherein the shank region adjoins and directly abuts the rear arc portion of the major cutting edges, the shank region having a diameter which is smaller than the minimum diameter at the abutment between the shank region and the rear arc portion.