Patent ID: 7494303

Claim:
An indexable milling insert having a trigon shape, the milling insert comprising a mounting hole placed centrally in the milling insert, an upper side and a lower side, which sides are parallel with each other and act as an alternating first support surface and second support surface, and major cutting edges, the major cutting edges being oriented perpendicularly to an axis of the mounting hole as well as arranged in such a way that each of a turning of the milling insert around a center of the mounting hole into an alternative cutting position and a flipping of the milling insert into an alternative cutting position provides an identical position of the major cutting edges in relation to a workpiece, wherein the major cutting edges of the milling insert are provided on the milling insert such that, when the insert is tangentially mounted in a cutting body, a shortest distance of the major cutting edges to the axis of the mounting hole in top view is smaller than a distance of a third support surface to an axis of the hole.