A milling tool for cyclo-palloid toothing has a holder and multiple first cutting plates. and includes a clamping portion for clamping the holder and a holder head, which projects radially compared to the clamping portion in the front end and on which there are multiple first cutting plate receptacles. The first cutting plates are fastened in the first cutting plate receptacles, and project radially outward, wherein the radially outermost points of the first cutting plates lie in each case on a common circle, the center point of which lies on the center axis of the holder. The first cutting plates are arranged at an angle to an orthogonal plane which is orthogonal to the holder center axis. Multiple first partly conical surfaces are provided on a top side of the holder head. Multiple second partly conical surfaces are provided on an end side of the holder head.

Provided is a cutter apparatus for machining a difficult-to-machine material, the cutter apparatus including: a cutting tool body which has a fastening portion formed at a center thereof; one or more cutters which are installed on the cutting tool body, and have superhard insert tips fixed to end portions thereof, respectively; and an angle adjusting unit which is installed in an internal space of the cutters, and adjusts angles of the cutters by spreading or retracting the cutters, so that angles of the cutters may be easily adjusted in accordance with a condition for cutting a difficult-to-machine material, in order to prevent damage to the superhard insert tips when machining a difficult-to-machine material having high hardness and high toughness.

A hob for a cutting apparatus including a hollow body of a sintered hard metal composition and a cavity located within the body, the cavity having a volume in the range of about 10% to about 90% of the volume of the body.

A hob for a cutting apparatus including a hollow body of a sintered hard metal composition and a cavity located within the body, the cavity having a volume in the range of about 10% to about 90% of the volume of the body.

A damper device for a machine tool, the damper device comprising a tubular element having a cavity and a central axis, the tubular element comprising a first surface; a damping mass arranged within the cavity and movable radially with respect to the central axis and relative to the tubular element; at least one spring element supporting the damping mass relative to the tubular element, the damping mass and the at least one spring element being arranged to attenuate kinetic vibration energy of the damper device; at least one fixed part having a fixed interior portion inside the cavity and a second surface; and a vibration damping material provided between the first surface and the second surface, the vibration damping material being arranged to attenuate potential vibration energy of the damper device; wherein the vibration damping material is substantially evenly compressed between the first surface and the second surface.

A tool head is for machining edges of a workpiece and includes a first tool section with first blades and a second tool section with second blades. The second blades are positioned between the first blades when seen in the circumferential direction. The second section is movable relative to the first section in the direction of the longitudinal axis between a passive and active position. The second blades are axially recessed relative to the first blades in the passive position and project axially outwards between the first blades in the active position. The tool head has a pressure switching mechanism for moving the second tool section between the passive and active position. In a tool system, the tool head and an actuation element can be moved axially relative to each other. The at least one actuation surface and the actuation element are configured to be axially pressed towards each other.

A drill tip may include a first part and a second part. The first part includes a cutting edge located at a side of a first end, and a recess located at a side of a second end, where the first end is one side of a central axis and the second end is another side of the central axis. The second part includes a shank portion extending along the central axis, and an engaging portion which connects to the shank portion at a side of the first end and includes a diameter greater than the shank portion. The engaging portion is located in the recess.

A processing apparatus for processing a workpiece includes a tool holding part 9 for holding a tool 3 for processing a workpiece 5, a transferring part 11 for transferring the tool 3 for processing the workpiece 5 with the tool 3, and a control unit 13 for controlling the transferring part 11 so as to transfer the tool 3 with respect to the workpiece 5 on the basis of an NC program, and in the NC program, an arithmetic expression for calculating the position of the tool 3 is incorporated and the program is corrected on the basis of the relationship between the cutting transferring distance, the wear amount, and the deflection amount in addition to the contour error of the tool 3.

A processing apparatus for processing a workpiece includes a tool holding part 9 for holding a tool 3 for processing a workpiece 5, a transferring part 11 for transferring the tool 3 for processing the workpiece 5 with the tool 3, and a control unit 13 for controlling the transferring part 11 so as to transfer the tool 3 with respect to the workpiece 5 on the basis of an NC program, and in the NC program, an arithmetic expression for calculating the position of the tool 3 is incorporated and the program is corrected on the basis of the relationship between the cutting transferring distance, the wear amount, and the deflection amount in addition to the contour error of the tool 3.

The invention relates to a coolant turbine for a rotary cutting tool, a rotary cutting tool, a coolant turbine module, and a method for operating a rotary cutting tool. The coolant turbine comprises an annular turbine base body having a first front face, an opposite second front face, and a plurality of coolant passages, which are arranged so as to be distributed around a central axis of the turbine base body, said passages having a coolant inlet and a coolant outlet, each of which extends through the turbine base body at least in portions in such a way that the turbine base body can be set into rotation by a flow of coolant.