Disclosed is an oscillatingly driven machine tool including a tool spindle that is mounted pivotably about its longitudinal axis, further including a drive motor that is coupled to a hydraulic generator for generating an oscillating fluid flow which drives a hydraulic motor being configured as a rotor blade motor. The rotor blade motor drives the tool spindle in such a way that the tool spindle rotates oscillatingly about its longitudinal axis. The rotor blade motor includes symmetrically arranged rotor blades that are disposed at regular angular distances with respect to each other.

Disclosed is an oscillatingly driven machine tool including a tool spindle that is mounted pivotably about its longitudinal axis, further including a drive motor that is coupled to a hydraulic generator for generating an oscillating fluid flow which drives a hydraulic motor being configured as a rotor blade motor. The rotor blade motor drives the tool spindle in such a way that the tool spindle rotates oscillatingly about its longitudinal axis. The rotor blade motor includes symmetrically arranged rotor blades that are disposed at regular angular distances with respect to each other.

In a method for machining a workpiece, a cutting tool is guided relative to the workpiece, with a vibration being superposed, the amplitude of which is at least 5 m. A supply circuit for a piezo actuator of a vibrating tool generates a voltage at the voltage output, which has a direct component and an alternating component. A supply system for a piezo actuator of a vibrating tool has the above-mentioned supply circuit which is connected to a secondary coil that is coupled to a primary coil.

In a method for machining a workpiece, a cutting tool is guided relative to the workpiece, with a vibration being superposed, the amplitude of which is at least 5 m. A supply circuit for a piezo actuator of a vibrating tool generates a voltage at the voltage output, which has a direct component and an alternating component. A supply system for a piezo actuator of a vibrating tool has the above-mentioned supply circuit which is connected to a secondary coil that is coupled to a primary coil.

A spindle arrangement for a machine tool, comprising a spindle for driving a tool and at least one actuator for exciting vibration of the tool, characterized in that the spindle arrangement is provided with a compensation device for at least partly compensating the inertia forces produced by the vibration excitation in the spindle region.

The invention relates to a machine for the gear cutting machining of workpieces, in particular a gear shaping machine, comprising a spindle for holding a machining tool, and a drive by means of which the spindle can be rotationally driven about its spindle axis, and further comprising an arrangement. When said arrangement is actuated, a spindle rotation caused by the drive changes the axial relative position with respect to the spindle axis.

The invention relates to a machine for the gear cutting machining of workpieces, in particular a gear shaping machine, comprising a spindle for holding a machining tool, and a drive by means of which the spindle can be rotationally driven about its spindle axis, and further comprising an arrangement. When said arrangement is actuated, a spindle rotation caused by the drive changes the axial relative position with respect to the spindle axis.

A waterfowl decoy deployment system includes a hub subsystem including a casing, a plurality of arms extending radially outward from the casing, and a plurality of waterfowl decoys. At least one waterfowl decoy of the plurality of waterfowl decoys is coupled to each arm of the plurality of arms. The waterfowl decoy deployment system also includes a thrust bar system coupled to the casing and positioned below the plurality of arms and the plurality of waterfowl decoys. The thrust bar system includes a thrust bar coupled to the casing and a plurality of thrust devices coupled to the thrust bar. The plurality of thrust devices are configured to rotate the thrust bar about an axis to induce a substantially circular motion to the casing, the plurality of arms, and the plurality of waterfowl decoys.

A motor-driven machine tool has a drive motor, the motor shaft of which is driven in rotation, with a tool drive shaft, which is driven in rotation or in oscillation about its longitudinal axis, and with a coupling drive for converting the rotational movement of the motor shaft into a driving movement of the tool drive shaft. Furthermore, a coupling is provided, which compensates an angular offset or change in position between the motor shaft and tool drive shaft which deviates from an axially parallel or right-angled arrangement of the two shafts.

A positive feed tool may include a motor, a power supply operably coupled to the motor to power the motor, a gear head and a spindle. The gear head may be operably coupled to the motor to be operated responsive to powering of the motor. The gear head may include a drive assembly and a feed assembly. The spindle may be operably coupled to the gear head to enable the spindle to be selectively driven rotationally and fed axially based on operation of the drive assembly and the feed assembly, respectively. The feed assembly may include a feed rate oscillator having a fixed cam and a movable cam operably coupled to each other via a plurality of rolling elements to oscillate between a maximum width and a minimum width of the feed rate oscillator based on a position of the movable cam. The rolling elements alternate between a first state in which at least some of the rolling elements are unloaded and a second state in which all of the rolling elements are loaded.