A coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate, wherein: the coating layer comprises a lower layer including at least one Ti compound layer containing a specific Ti compound, an intermediate layer including an -type Al.sub.2O.sub.3 layer containing -type Al.sub.2O.sub.3, and an upper layer including a TiCN layer containing TiCN; the respective layers are laminated in this order from the substrate side toward a surface side of the coating layer; an average thickness of the coating layer is from 5.0 m or more to 30.0 m or less; and an angle formed by a normal to a cross-sectional surface which is located within a predetermined range below a surface of the intermediate layer and is parallel to the surface of the substrate and a normal to a (001) plane of a particle of an -type Al.sub.2O.sub.3 layer, and an angle formed by a normal to a cross-sectional surface which is located within a predetermined range below a surface of the upper layer and is parallel to the surface of the substrate and a normal to a (111) plane of a particle of a TiCN layer, respectively satisfy predetermined conditions.

A coated cutting tool has at least one rake face and at least one flank face and a cutting edge therebetween. The coated cutting tool includes a substrate and a coating. The coating includes a (Ti,Al)N layer. The (Ti,Al)N layer is either a single monolithic layer or a multilayer of two or more alternating (Ti,Al)N sub-layer types having different compositions. The (Ti,Al)N layer has an overall atomic ratio Al/(Ti+Al) of >0.67 but ?0.85, wherein the (Ti,Al)N layer shows a plane strain modulus distribution along a direction perpendicular to a cutting edge on the rake face and/or the flank face. The plane strain modulus at a point at a distance of 0.5 mm from a point at the cutting edge is more than 85% of the plane strain modulus at the cutting edge, with the plane strain modulus at the cutting edge being ?450 GPa.

A cutting tool for metal cutting includes a substrate at least partially coated with a 3-30 ?m coating. The substrate is of cemented carbide, cermet or ceramic. The coating includes one or more layers, wherein at least one layer is a Ti(C,N) layer having a thickness of 3-25 ?m. The Ti(C,N) layer is composed of columnar grains with a mean grain size ?25 nm and ?35 nm.

A coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate, wherein the coating layer comprises a lower layer, an intermediate layer, and an upper layer in this order from the substrate side to the surface side of the coating layer, the lower layer comprises one or two or more specific Ti compound layers, the intermediate layer comprises an ?-Al.sub.2O.sub.3 layer, the upper layer comprises one or two or more specific Ti compound layers, at least one of the Ti compound layers in the upper layer is a TiCN layer, the average thickness of the upper layer is 1.00 ?m or more and 6.50 ?m or less, and the upper layer satisfies the conditions represented by the formula (i): 25?RSA1<70 and the formula (ii): 25?RSA2<70.

A cutting tool comprising a base material and a coating; wherein: the coating comprises a titanium compound layer and an a-Al.sub.2O.sub.3 layer; the a-Al.sub.2O.sub.3 layer comprises a region A1 and a region A2; the titanium compound layer comprises a region B1 and a region B2; an average particle diameter a1 of the a-Al.sub.2O.sub.3 particles in the region A1, an average particle diameter a2 of the a-Al.sub.2O.sub.3 particles in the region A2, an average particle diameter b1 of the titanium compound particles in the region B1, and an average particle diameter b2 of the titanium compound particles in the region B2 satisfy relationships represented by respective expressions 1 to 3:

0.80?a2/b2?1.27Expression 1

1.50?a1/a2?10Expression 2

1.45?b1/b2?5Expression 3

: and the average particle diameter b1 is 0.10 ?m or more and 0.50 ?m or less.

A cutting tool including a substrate at least partially coated with a coating is provided. The coating includes a ?-Al.sub.2O.sub.3 layer, wherein the ?-Al.sub.2O.sub.3 layer in a portion O1 of the ?-Al.sub.2O.sub.3 layer within 1 ?m from the bonding layer, as measured with EBSD, exhibits Schmid factors calculated for the {0001} <11-20> slip system with the normal force applied at a 45? angle to the surface normal of the ?-Al.sub.2O.sub.3 layer, wherein the Schmid factor distribution was determined and wherein >90% of the analyzed area had a Schmid factor between 0.4 and 0.5, preferably >97% of the analyzed area had a Schmid factor between 0.4 and 0.5.

A precision pneumatic drill spindle and method provides reduced spin axis error and increased rate of forming holes in a microelectronic substrate. The spindle includes a press-fit collar that accepts drill bits and incorporates turbine blades around the collar, which is rotated by directing pressurized air through a number of nozzles distributed around the collar within a housing of the spindle. The collar is supported by air bearings above and below the collar. The turbine blades may be provided by concavities in the collar forming a Pelton wheel type rotation system that concentrates the air flow to improve energy transfer from the pressurized air directed by the nozzles to the collar, increasing the rotation rate of the collar. Exit air may be directed downward toward the tip of the drill bit by inclined channels within the lower air bushing assembly, improving the debris removal rate.

The present invention is directed to a surface-coated cubic boron nitride sintered material tool including a cBN substrate and a hard coating layer formed on a surface of the cBN substrate and having an alternate laminated structure of A layer and B layer. A peak of the grain size distribution of cBN grains in the cBN sintered material is present within a range of a grain size from 0.50 to 1.00 m. The A layer has a composition of (Ti.sub.1-xAl.sub.x)N (0.4x0.7 in an atomic ratio). The B layer has a composition of (Cr.sub.1-y-zAl.sub.yM.sub.z)N (0.03y0.6 and 0z0.05 in an atomic ratio). An X-ray diffraction peak of a (200) plane is present at a position of a diffraction angle of 43.6 plus or minus 0.1 degrees, and a plastic deformation work ratio of the B layer is 0.35 to 0.50.

A coated cutting tool includes a substrate of cemented carbide, cermet, ceramics, steel or cubic boron nitride and a multi-layered wear resistant coating. The multi-layered wear resistant coating has a total thickness from 5 to 25 m and includes refractory coating layers deposited by chemical vapour deposition (CVD) or moderate temperature chemical vapour deposition (MT-CVD). The multi-layered wear resistant coating has at least one pair of layers (a) and (b), with layer (b) being deposited immediately on top of layer (a). Layer (a) is a layer of aluminium nitride having hexagonal crystal structure (h-AlN) and a thickness from 10 nm to 750 nm. Layer (b) is a layer of titanium aluminium nitride or titanium aluminium carbonitride represented by the general formula Ti.sub.1-xAl.sub.xC.sub.yN.sub.z with 0.4x0.95, 0y0.10 and 0.85z1.15, having a thickness from 0.5 m to 15 m, and at least 90% of the Ti.sub.1-xAl.sub.xC.sub.yN.sub.z of layer (b) has a face-centered cubic (fcc) crystal structure.

A method and device for stripping the insulation from and peeling pre-insulated pipe ends by means of a peeling and cutting tool.