Abstract: A tool unit includes a tool head, a motor and a switching drive for the head. The head has a first section with first blades and a second section with second blades. The second section is movable to and fro between a passive and an active position relative to the first section, the second blades being retracted in the passive position, and the second blades projecting axially beyond the first blades in the active position. The drive includes an electromagnet and an actuating armature made from magnetically attractable material and is arranged in the region of action of the electromagnet. The electromagnet is positioned between the head and the motor and is fastened to a housing part of the motor such that it cannot be rotated. The armature is connected fixedly to the second section. A gap remains between the electromagnet and the armature in the passive and active position.

Abstract: 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.

Abstract: A tool unit includes a tool head, a motor and a switching drive for the head. The head has a first section with first blades and a second section with second blades. The second section is movable to and fro between a passive and an active position relative to the first section, the second blades being retracted in the passive position, and the second blades projecting axially beyond the first blades in the active position. The drive includes an electromagnet and an actuating armature made from magnetically attractable material and is arranged in the region of action of the electromagnet. The electromagnet is positioned between the head and the motor and is fastened to a housing part of the motor such that it cannot be rotated. The armature is connected fixedly to the second section. A gap remains between the electromagnet and the armature in the passive and active position.

Abstract: 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.

Abstract: A milling tool has a support member with an exterior surface with at least one receptacle, wherein the at least one receptacle has a bottom. At least one cutting element provided with a cutter having a cutting edge is positioned in the at least one receptacle. A three-point support is arranged between the at least one cutting element and the bottom of the at least one receptacle for positioning the cutting edge relative to the bottom of the at least one receptacle. The three-point support comprises three support pads arranged at a bottom side of the at least one cutting element and/or three projections arranged at the bottom of the at least one receptacle.

Abstract: A milling tool has a support member with an exterior surface with at least one receptacle, wherein the at least one receptacle has a bottom. At least one cutting element provided with a cutter having a cutting edge is positioned in the at least one receptacle. A three-point support is arranged between the at least one cutting element and the bottom of the at least one receptacle for positioning the cutting edge relative to the bottom of the at least one receptacle. The three-point support comprises three support pads arranged at a bottom side of the at least one cutting element and/or three projections arranged at the bottom of the at least one receptacle.