A cutting tool including a rake face and a flank face includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an Al.sub.2O.sub.3 layer, residual stress of the Al.sub.2O.sub.3 layer has a minimum value R.sub.min at at least a portion of a region d1 of the rake face, the minimum value R.sub.min is more than −0.27 GPa and less than or equal to −0.1 GPa.

A coated tool includes a base and a coating layer on the base. The coating layer includes a cubic crystal that includes one or more kinds of elements selected from Groups 4, 5 and 6 in the periodic table, Al, Si, B, Y and Mn, and one or more kinds of elements selected from C, N and O. A maximum peak is in a range of 50° or more in a distribution of X-ray intensity (111) at α axis of a pole figure, the X-ray intensity regarding a (111) plane of the cubic crystal. The intensity at the maximum peak is Imax, a peak width at 0.8 Imax of the maximum peak is 20° or more, and the intensity at 90° is 0.78 Imax or more. A cutting tool includes a holder which includes a pocket at an end, and the coated tool in the pocket.

A cutting tool including a rake face and a flank face includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an Al.sub.2O.sub.3 layer, residual stress of the Al.sub.2O.sub.3 layer has a minimum value R.sub.min at at least a portion of a region f1 in the flank face, the minimum value R.sub.min is more than or equal to −0.25 GPa and less than or equal to −0.1 GPa.

A cutting tool including a rake face and a flank face includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an Al.sub.2O.sub.3 layer, residual stress of the Al.sub.2O.sub.3 layer has a minimum value R.sub.min at at least a portion of a region f1 in the flank face, the minimum value R.sub.min is more than or equal to −0.25 GPa and less than or equal to −0.1 GPa.

A cutting tool includes a base material, and a coating film covering the base material in contact with the base material. The base material is a cubic boron nitride sintered material. The coating film is a ceramic. An amount of oxygen in the coating film is less than or equal to 0.040 mass percent.

A cutting tool includes a base material, and a coating film covering the base material in contact with the base material. The base material is a cubic boron nitride sintered material. The coating film is a ceramic. An amount of oxygen in the coating film is less than or equal to 0.040 mass percent.

A milling tool comprising a cylindrical shaft part, which has a central axis and which is followed by a cylindrical cutting part comprising at least three circumferential cutting edges, which run helically and which are separated from one another by chip grooves. The circumferential cutting edges continue via cutting edge corner regions in end cutting edges, which run essentially radially and which subsequently slope away from the milling cutter face towards the central axis from radially outer end cutting edge sections, in each case with a cutting edge section, which is formed by ground-in end pockets. The cutting edge section slopes continuously all the way to the central axis. In the region of the milling cutter core, it is formed by a point thinning, which is introduced into the end pocket and by means of which a center cutting edge is created. Also, a method for producing the milling tool.

Provided is a coated cutting tool, which includes a hard coating film containing a layer (b) formed of a nitride or a carbonitride, a layer (c) which is a layered coating film formed by alternately layering a nitride or carbonitride layer (c1) that contains 55 atom % or more and 75 atom % or less of Al, Cr having a second highest content percentage, and at least Si and a nitride or carbonitride layer (c2) that contains 55 atom % or more and 75 atom % or less of Al and Ti having a second highest content percentage, each layer having a film thickness of 50 nm or less, and a layer (d) that is a nitride or carbonitride that contains, with respect to a total amount of metal elements (including metalloid elements), 55 atom % or more and 75 atom % or less of Al, Cr having a second highest content percentage.

Provided is a coated cutting tool, which includes a hard coating film containing a layer (b) formed of a nitride or a carbonitride, a layer (c) which is a layered coating film formed by alternately layering a nitride or carbonitride layer (c1) that contains 55 atom % or more and 75 atom % or less of Al, Cr having a second highest content percentage, and at least Si and a nitride or carbonitride layer (c2) that contains 55 atom % or more and 75 atom % or less of Al and Ti having a second highest content percentage, each layer having a film thickness of 50 nm or less, and a layer (d) that is a nitride or carbonitride that contains, with respect to a total amount of metal elements (including metalloid elements), 55 atom % or more and 75 atom % or less of Al, Cr having a second highest content percentage.

A coating includes a first base layer including a nitride of at least Al and Cr, a second base layer including a nitride of at least Al and Cr overlying the first base layer, and an outermost indicator layer overlying the second base layer. The first base layer has a positive residual compressive stress gradient. The second base layer has substantially constant residual compressive stresses. The outermost indicator layer includes a nitride of Si and Me, wherein Me is at least one of Ti, Zr, Hf, and Cr. The outermost indicator layer has residual compressive stresses that are less than the residual compressive stresses of the second base layer.