A polycrystalline cubic boron nitride, PCBN, material is provided. The material comprises between 30 and 90 weight percent cubic boron nitride (cBN) and a matrix material in which the cBN particles are dispersed. The matrix material comprises particles of an aluminium compound; the matrix material particles having a d50 when measured using a linear intercept technique of no more than 100 nm.

A coated cutting tool comprising a substrate and a coating layer formed on a surface of the substrate, wherein: the coating layer comprises at least one -type aluminum oxide layer; and, in the -type aluminum oxide layer, a texture coefficient TC (0,0,12) of a (0,0,12) plane is from 4.0 or more to 8.4 or less, and a texture coefficient TC (1,2,11) of a (1,2,11) plane is from 0.5 or more to 3.0 or less.

A drill bit, formed of a a drill blank and a drill body. The drill body includes multiple outer projections and outer wall channels and multiple inner projections and inner wall channels, where the inner wall channels are formed as back sides of the outer projections and the inner wall channels have complementary shapes to the shapes of the outer projections, and the outer wall channels are formed as the backside of the inner projections, and the outer wall channels have complementary shapes to the shapes of the inner projections, where the outer projections and outer wall channels are distributed around a circumference of the drill body, and wherein each of the outer projections and outer wall channels include at least one curved parts therein.

Tool system (1) comprising a tool holder (2) that includes an insert seat (17) for accommodating an insert (6) having a depression (7), further comprising a clamping element (4) that has an opening (26) for accommodating a clamping means (15), and a projection (5), and comprising a mechanism (functional dimension (Fx) that limits the linear mobility of the clamping element (4). This ensures that a disposable insert (6) can be repeatedly securely clamped.

A chuck table for holding a plate-shaped workpiece under suction includes a suction plate made of porous ceramics and having a plurality of open pores, and a frame covering a side surface and a reverse side, except an attractive suction surface, of the suction plate and having a plurality of suction grooves defined in an upper surface thereof and a fluid communication passage defined therein that holds the suction grooves in fluid communication with a suction source, the frame supporting the suction plate thereon. The suction plate has a porosity in the range from 60% to 70% by volume, and the open pores have diameters in the range from 10 m to 25 m.

A cutting tool for radial and axial recessing and for lateral motion for so-called grooving of primarily metallic materials, having a clamping holder and a cutting element base, fastened to the clamping holder, on which a cutting element rests, the cutting element being pressed onto the cutting element base by a clamping finger of a clamping claw, and the cutting element being guided on the cutting element base with a prism.

Tool holder has a first section adapted to be connected to a machining center and a tool holding section comprising a bore with a surface defining an inner diameter of the bore. Dispersed around the surface of the bore and at least partially embedded in the surface of the bore is a joining compound having a Young's modulus greater than a Young's modulus of the surface of the bore.

A coated cutting tool includes a body and a hard and wear resistant coating on the body. The coating has at least one NbN layer with a thickness between 0.2 m and 15 m, wherein the NbN layer includes a phase mixture of a cubic phase, c-NbN, and a hexagonal phase, h-NbN.

A coated cutting tool includes a body and a hard and wear resistant PVD coating on the body, wherein the body is made from a cemented carbide, cermet, ceramics, polycrystalline diamond or polycrystalline cubic boron nitride based materials. The coating includes a first (Ti,Al)-based nitride sub-coating and a second (Ti,Al)-based nitride sub-coating. The first (Ti,Al)-based nitride sub-coating can be a single layer, and the second (Ti,Al)-based nitride sub-coating can be a laminated structure, wherein the first (Ti,Al)-based nitride sub-coating includes a (Ti.sub.1-xAl.sub.x)N.sub.z-layer where 0.1<x<0.4, 0.6<z<1.2, and wherein the second (Ti,Al)-based nitride sub-coating includes a (Ti.sub.1-x1-y1Al.sub.x1Cr.sub.y1)N.sub.z1 layer where 0.5<x1<0.75, 0.05<y1<0.2, 0.6<z1<1.2.

A method for processing a CMC airfoil includes nesting an airfoil fiber preform in a cavity of a fixture that has first and second tool segments, closing the fixture by rotating a first tool segment about a hinge, the closing causing the tool segments to clamp on a tail portion of the fiber preform and thereby conform the tail portion to the fixture. While in the fixture, the fiber preform is then partially densified with an interface coating material to form a partially densified fiber preform. While still in the fixture, one or more cooling holes are drilled into the trailing edge of the partially densified fiber preform. After the drilling, the partially densified fiber preform is removed from the fixture and further densified with a ceramic matrix material to form a fully densified CMC airfoil.