Abstract: An end-mill comprising a shank and a cutting portion along its longitudinal axis, and formed by combining ceramic and metal based materials via a brazing method. The cutting portion includes a cutting diameter varying between 2 to 20 mm, at least one web thickness found at a blade part, at least one helix angle having a cutting edge thereon, a core diameter that is at least 0.7 times the cutting diameter, at least one corner radius found at the tip part of the blades between the flutes, and axial and radial rake angles at which a cutting operation is made. TiAlN coating is applied over the ceramic-metal based end-mill by a PVD method in order to extend the service life of the end-mill, increase abrasion resistance, and minimize the welding (sticking) problem of chips on the cutting tools.

Abstract: The present invention is an end-mill (A) comprising a shank (B) and a cutting portion (C) along its longitudinal axis (4), and formed by combining ceramic and metal based materials via brazing method, comprising: a cutting diameter (1) varying between 2 to 20 mm, at least one web thickness (18) 0 found at a blade (26) part, at least one helix angle (10) having a cutting edge (13) thereon, a core diameter (16) that is at least 0.7 times the cutting diameter (1), at least one corner radius (5) found at the tip part of the blades (26) between the flutes (9) and axial and radial rake angles (17) at which cutting operation is made. TiAlN coating is applied over ceramic-metal based 5 end-mill (A) by PVD method in order to extend the service life of the end-mill, increase abrasion resistance, and minimize the welding (sticking) problem of chips on the cutting tools.