The invention provides a power tool, including: a motor; an output shaft for mounting a work head, wherein a plane passing through an axis of the motor and an axis of the output shaft is defined as a reference plane; and a housing, including an inner housing and an outer housing, wherein the inner housing and the outer housing are spaced, and the motor is at least partially accommodated in the inner housing; a limiting mechanism and a vibration reduction mechanism disposed between the outer housing and the inner housing, and wherein the vibration reduction mechanism acts in a direction perpendicular to the reference plane, the limiting mechanism is used for limiting the outer housing to move relative to the inner housing in the reference plane or a plane parallel to the reference plane, and the limiting mechanism and the vibration reduction mechanism are respectively independent.

The disclosure relates to a system having at least one first oscillation insert tool that is configured to be effectively coupled to an oscillation hand power tool, and at least one second oscillation insert tool that differs from the first oscillation insert tool and is configured to be effectively coupled to the oscillation hand power tool as an alternative to the first oscillation insert tool. At least one of the at least two oscillation insert tools comprises at least one compensating unit for at least substantially adapting a mass moment of inertia of the at least one oscillation insert tool to a mass moment of inertia of the at least one second oscillation tool.

The present invention relates to a device for detaching/attaching a hand grinder polishing disk, the device being clamped on the rotating shaft of a grinder main body so as to enable the easier and quicker detachment/attachment of a consumable polishing disk used for finishing, cutting, severing, etc. the surface of a target object, or to enable the definite prevention of loosening, vibration phenomenon, etc. The present invention comprises: a grinder main body which has a rotating shaft operating at a high speed by means of air pressure or the driving of an electric motor; a power transmission member which has a stopping protrusion formed on the upper end part of the body thereof and a hexagonal body including a flange formed on the center part of the body thereof, and which is clamped on the rotating shaft of the grinder main body by a fixing bolt; a stopper main body which has a hexagonal hole formed on the inner circumferential surface thereof for accommodating the power transmission member, and which has an arc-shaped seat groove formed on the circumference of the hexagonal hole so as to face each other; a pair of upper and lower rotating plates which are each fitted in a flat plate portion on the upper end of the stopper main body; and a disk holder which has an upper fixing ring and a lower support plate assembled on the power transmission member for fixing an abrasive material.

A grinding wheel assembly is disclosed and includes an arbor in which a pull stud may be installed. Further, the arbor can include a head assembly that includes a mounting plate, a cover plate, and an abrasive body disposed there between. The abrasive is removably engaged with the mounting plate and the cover plate.

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.

A planarization processing device for polishing a substrate, e.g., a semiconductor wafer, includes two planarization processing sections (SP1, SP2) that each include a holder (62) for holding a workpiece (W), a drive motor (71) that rotates the holder (62), a support plate (4) holds a pad (5), a linear guide (3) that guides reciprocal movement of the support plate (4) in a direction parallel to the surface of the pad (5), and a drive cylinder (72) that advances the holder (62) or the support plate (4) in a direction that intersects the surface of the workpiece W or the pad (5) to cause the opposing surfaces of the workpiece and the pad (5) to be at least proximal to each other. A primary driver (PD) causes the support plates (4) of the planarization processing sections (SP1, SP2) to reciprocate along the same straight line in opposite phases.

A power tool includes a motor housing extending along a first axis, a motor positioned in the motor housing, a handle extending along a second axis perpendicular to the first axis, and a vibration damping assembly positioned between the motor housing and the handle. The vibration damping assembly includes a first coupling portion defined by the motor housing, a second coupling portion defined by the handle, and an elastomeric damper captured between the first coupling portion and the second coupling portion. The first coupling portion includes a first mating surface facing toward the handle, and the second coupling portion includes a second mating surface facing toward the motor housing and positioned opposite the first mating surface. The damper includes a mating surface portion that extends outward in a direction transverse to the second axis, and the mating surface portion is positioned between the first and second mating surfaces.

The present disclosure relates to an apparatus for use in a gear cutting machine for the gear-coupled manufacture or machining of workpieces having at least one machine table at which a workpiece spindle is arranged for holding a clamping apparatus for a workpiece, and having at least one tool spindle for holding a machining tool, wherein the tool spindle is equipped with an integrated balancing system for balancing the tool. In accordance with the present disclosure, a further independent balancing system for the workpiece spindle is integrated in addition to the balancing system in the tool spindle.

The invention relates to an electric hand-held tool with a tool mount, a motor for driving a tool fastened in the tool mount, and a housing which includes a handle area, a motor area for accommodating the motor, and in which vent openings are configured for the ventilation of the motor. At least in the area of the vent openings, the housing is provided with at least one cover with a closed surface, said cover sitting flush against the housing with an edge area facing the tool mount, being arranged at a distance from the housing in an area above the vent openings, and leaving a gap between the cover and the housing in the area of its edge area facing away from the tool mount.

A handheld oscillation machine tool has support devices for maintaining a spacing between internal parts and an outer housing. The support devices are arranged in pairs of first and second support devices. One support device in each pair has a concave circular surface, and the other has an opposed convex circular surface. Elastically deformable damping elements are arranged between the pairs of support devices. The damping elements are deformed from original flat conditions under forces applied by the support devices, and have concave and convex circular surface adjoining the opposed concave and convex circular surfaces at the support devices.