Patent ID: 7857555
Filing Date: 2010-12-28
Classification: B23B,B23C,Y10T

Abstract:
1. A combination comprising an indexable cutting bit and a bit holder for holding said indexable cutting bit, wherein the indexable cutting bit which has a lower and an upper face and peripherally extending side faces of which at least a part, in an intersection at least with the upper face, defines a respective cutting edge, and wherein the indexable cutting bit has recesses for receiving a support element at least in the region, adjoining the lower face, of at least a part of its side faces, wherein the bit holder has a first support face which receives at least a part of the lower face of the indexable bit, and wherein the bit holder has at least two support elements which extend substantially away from the plane of the first support face, each of which has a face for bearing against a bottom of the recess in the indexable bit and is of such dimensions that, when viewed perpendicularly on to the upper face, the face for bearing against a bottom of the recess in the indexable bit does not project beyond the profile of the upper face, and wherein each support element does not project beyond a tangential plane to the portions of the side face; each support element is in the shape of a flat parallelepiped of which a largest side face forms a contact face for the indexable cutting bit; and wherein the internal spacing between the support elements corresponds to the spacing of the bottom faces of mutually opposite recesses in the indexable cutting bit and that the external spacing (A) of the support elements is less than the length (L) of an active cutting edge of the indexable bit.