Patent ID: 9586274
Date: 2017-03-07
CPC Classifications: B23B,B23C,Y10T

Claim:
1. Rotatable tool for preparing rotational symmetrical surfaces and having a shaft which is mountable for rotation about an axis thereof, and a cutting head comprising at least one recess for receiving a cutting insert, a base surface of said recess being provided for supporting a bottom or top surface of a cutting insert and being tilted by an angle between 5° and 90° with respect to said axis, wherein the cutting insert comprises a cuboid body having a substantially square top face and a bottom face, said top face and bottom face being connected by means of four peripheral adjoining side surfaces, wherein at least two cutting edges are formed at the transition of the top face to at least two side surfaces, that cutting edges defining a plane of the top face, wherein the plane defined by the top face cutting edges has maximum dimensions of 6 mm×6 mm, the bottom face having a supporting surface which is formed exactly parallel to the plane defined by the top face cutting edges by means of grinding within a tolerance of less than 5 angular minutes, the top face and the bottom face each being formed as continuous planar surfaces, wherein the cutting edges of the top face and the bottom face are defining the shape of a cube within an edge length tolerance of 5%, and wherein said base surface of said recess, which is provided for the support of a respective non-active face of said top and bottom faces, respectively, is ground to a particular angle between 5° and 90° relative to said axis within a tolerance of less than 5 angular minutes.