In order to achieve as highly accurate an alignment of the frictional tool as possible and therefore as high a drilled hole quality as possible during the precision machining of a drilled hole, the cutting edges of the frictional tool are divided into two cutting groups, the cutting edges of which are spaced apart with respect to one another in each case by an axial spacing from one another. Here, the axial spacing is selected in such a way that, at a predefined first, slower feed speed, merely the cutting edges of the first cutting edge group are in engagement with the workpiece and, at a higher, predefined second feed speed, all cutting edges are in engagement with the workpiece.

In order to achieve as highly accurate an alignment of the frictional tool as possible and therefore as high a drilled hole quality as possible during the precision machining of a drilled hole, the cutting edges of the frictional tool are divided into two cutting groups, the cutting edges of which are spaced apart with respect to one another in each case by an axial spacing from one another. Here, the axial spacing is selected in such a way that, at a predefined first, slower feed speed, merely the cutting edges of the first cutting edge group are in engagement with the workpiece and, at a higher, predefined second feed speed, all cutting edges are in engagement with the workpiece.

It is an object to provide a rotating tool having an excellent wear resistance. The rotating tool includes: a base member including a cutting edge portion and a flute portion; and a coating film that coats a surface of the base member, a ratio B/A of a film thickness B of the coating film coating a surface of the flute portion to a film thickness A of the coating film coating a surface of the cutting edge portion being not less than 0.8.

A bottom cutting step up reamer incorporates a shaft having a first end with attachment features adapted to be received in a chuck. A plurality of bottom cutting edges substantially perpendicular to the shaft are located at a second end distal from the first end. At least one step up land is provided proximate the plurality of bottom cutting edges and spaced toward the first end with a plurality of parallel cutting edges substantially parallel to the shaft.

A bottom cutting step up reamer incorporates a shaft having a first end with attachment features adapted to be received in a chuck. A plurality of bottom cutting edges substantially perpendicular to the shaft are located at a second end distal from the first end. At least one step up land is provided proximate the plurality of bottom cutting edges and spaced toward the first end with a plurality of parallel cutting edges substantially parallel to the shaft.

A cutting tool (2) is specified with a cutting region (4) that comprises a substrate (12) onto which a coating (10) is applied, which coating (10) is subsequently processed, whereby a sharp cutting edge (8) is formed. Furthermore, a corresponding method for the manufacture of the cutting tool (2) is specified. By means of the sharpening of the cutting edge (8) after the coating rather than before, a particularly sharp cutting edge (8) is formed, whereby the precision of the cutting tool (2) as well as its service life is improved.

A cutting tool (2) is specified with a cutting region (4) that comprises a substrate (12) onto which a coating (10) is applied, which coating (10) is subsequently processed, whereby a sharp cutting edge (8) is formed. Furthermore, a corresponding method for the manufacture of the cutting tool (2) is specified. By means of the sharpening of the cutting edge (8) after the coating rather than before, a particularly sharp cutting edge (8) is formed, whereby the precision of the cutting tool (2) as well as its service life is improved.

A tool coupling arrangement for drills and reamers includes tool and shank portions with respective tool and shank axial stoppers. An at least partially cylindrical tool coupling end of the tool portion is located within a longitudinal through forward bore portion in the shank portion, and being coupled therein via an elongated coupling member located further inwards in the shank portion and comprising axially opposite member coupling and pulling ends. The forward bore portion has front and rear sub-portions and a bore recess which is located therebetween and extends radially outwardly. In a locked position, the tool axial stopper abuts the shank axial stopper. The tool coupling end abuts the front and rear sub-portions. And the member coupling end is wedged between the tool coupling end and the bore recess.

A tool for machining a workpiece. The tool comprises a first tool component which comprises a first internal coolant bore and, on a first face side end, a first connection interface, wherein the first connection interface comprises a first end face for attaching a joining material as well as an elevation which protrudes from the first end face, wherein a first coolant outlet of the first internal coolant bore is arranged on the elevation. In addition, the tool comprises a second tool component which comprises a second internal coolant bore and, on a second face side end, a second connection interface, wherein the second connection interface comprises a second end face for attaching the joining material as well as a recess provided in the second end face, wherein a second coolant outlet of the second internal coolant bore is arranged in the recess. The first tool component and the second tool component are joined together by means of the joining material attached to the first and second end face in such a manner that the first coolant outlet is aligned with the second coolant outlet.

A cutting tool for performing cutting operations on a workpiece when the cutting tool is rotated about a central axis by a machine tool, the cutting tool includes a generally cylindrical body disposed about the central axis. The generally cylindrical body includes a first end and an opposite second end. The cutting tool further includes a cutting portion and a mounting portion. The cutting portion is disposed at or about the first end of the generally cylindrical body and includes a number of cutting edges structured to engage the workpiece during cutting operations. The mounting portion is disposed at or about the opposite second end of the generally cylindrical body and is structured to be coupled to the machine tool. At least a portion of the generally cylindrical body comprises a molded portion formed via a molding process about the cutting portion in a manner that couples the cutting portion to the generally cylindrical body.