In order to provide an adjustment device (1), which can be driven in rotation about a longitudinal axis (2), for adjusting a cutting tool, comprising a cutting tool carrier element (3) mounted for carrying out an adjusting movement (6), a drive unit (13, 13b) for driving the cutting tool carrier element (3) and a circuit carrier element (200), which has a surface region facing the drive unit (13, 13b), for forming at least one electronic control circuit (500, 510, 520, 530) provided for controlling the drive unit (13, 13b), 13b), which allows an improved compact design so that instabilities of the main drive element, in particular a tool spindle, are better avoided and the machining space is better utilised, it is proposed that two surface points (600, 610) of the surface area (220) can be connected outside the circuit carrier element (200) by a connecting straight line (620), the end points of which are the surface points (600, 610).

A boring head is provided comprising a tool body (1) having a main rotation axis (R) about which the tool body (1) rotates during boring operations. The boring head further comprises a tool carrier (6) arranged in or on the tool body (1), a first motor (9) for displacing the tool carrier (6) relative to the tool body (1) and a clamping mechanism (26) with a clamping element (27, 55, 68, 81) for effecting a clamping force on the tool carrier (6), in order to prevent a displacement of the tool carrier (6) relative to the tool body (1) during boring operations. The clamping mechanism (26) is an active clamping mechanism which effects a clamping force that can be adjusted actively.

A milling head includes a milling head base, a plurality of blades annularly arranged around the milling head base; and an actuator to rotate the milling head base. Each of the plurality of blades extends from the base at a differential radial distance as compared to a neighboring blade from the plurality of blades.

A boring tool includes a tool body rotatable around a central rotation axis. A slider member is arranged movably inside the tool body along a path extending transversely to the rotation axis. An insert pocket is associated with the slider member to move therewith and configured to receive a cutting insert with a cutting edge and which projects from the tool body transversely to the rotation axis. A motor member is connected to the slider member and controllable to move the slider member transversely to the rotation axis for changing the distance of the cutting edge to the rotation axis. The motor member is arranged inside the tool body together with the slider member in a cutting part of the tool body at a front end thereof. The motor member is arranged in parallel with the transversal extension of the slider member along said path.

A boring head is provided comprising a tool body (1) having a main rotation axis (R) about which the tool body (1) rotates during boring operations. The boring head further comprises a tool carrier (6) arranged in or on the tool body (1), a first motor (9) for displacing the tool carrier (6) relative to the tool body (1) and a clamping mechanism (26) with a clamping element (27, 55, 68, 81) for effecting a clamping force on the tool carrier (6), in order to prevent a displacement of the tool carrier (6) relative to the tool body (1) during boring operations. The clamping mechanism (26) is an active clamping mechanism which effects a clamping force that can be adjusted actively.

A hybrid cutting apparatus and a method of cutting a groove are provided. The hybrid cutting apparatus includes: a main body that is connected with a rotation shaft of a machine tool; a grooving tool that is coupled to one side of the main body and for forming a groove at an interior circumference of a workpiece; and a tool position control means that controls a position of the grooving tool to correspond to a cutting surface position of the workpiece.

A boring tool includes a tool body rotatable around a central rotation axis. A slider member is arranged movably inside the tool body along a path extending transversely to the rotation axis. An insert pocket is associated with the slider member to move therewith and configured to receive a cutting insert with a cutting edge and which projects from the tool body transversely to the rotation axis. A motor member is connected to the slider member and controllable to move the slider member transversely to the rotation axis for changing the distance of the cutting edge to the rotation axis. The motor member is arranged inside the tool body together with the slider member in a cutting part of the tool body at a front end thereof. The motor member is arranged in parallel with the transversal extension of the slider member along said path.

In order to provide an adjustment device (1), which can be driven in rotation about a longitudinal axis (2), for adjusting a cutting tool, comprising a cutting tool carrier element (3) mounted for carrying out an adjusting movement (6), a drive unit (13, 13b) for driving the cutting tool carrier element (3) and a circuit carrier element (200), which has a surface region facing the drive unit (13, 13b), for forming at least one electronic control circuit (500, 510, 520, 530) provided for controlling the drive unit (13, 13b), 13b), which allows an improved compact design so that instabilities of the main drive element, in particular a tool spindle, are better avoided and the machining space is better utilised, it is proposed that two surface points (600, 610) of the surface area (220) can be connected outside the circuit carrier element (200) by a connecting straight line (620), the end points of which are the surface points (600, 610).

A hybrid cutting apparatus and a method of cutting a groove are provided.

The hybrid cutting apparatus includes: a main body that is connected with a rotation shaft of a machine tool; a grooving tool that is coupled to one side of the main body and for forming a groove at an interior circumference of a workpiece; and a tool position control means that controls a position of the grooving tool to correspond to a cutting surface position of the workpiece.