A flinger reducing a noise associated with rotation of an electric motor, and an electric motor with the flinger. The flinger fixed to a rotating shaft of the electric motor includes a plurality of tapped holes provided in an end face on an electric motor, and a cut-out cutting out a part of each of the tapped holes. The tapped hole of the flinger has a depth less than a depth of a tapped hole of a flinger in the related art by a distance equivalent to a depth of the cut-out, so that a natural frequency of an air column formed in the tapped hole increases. Thus, when the flinger is used, rotation speed causing increase in noise during rotation can be shifted to higher rotation speed.

Beam processing machines such as laser beam or fluid jet processing machines (1) for processing workpieces (5) include a frame (3), a workpiece rest (4) held by the frame (3), and a beam tool (2) movable relative to the workpiece rest (4). Incorporated in a vibration-transmitting connecting path between the beam tool and the rest surface for workpieces defined by the workpiece rest are a plurality of damping elements that decouple vibrations between the rest surface and beam tool, its mounting, or the frame.

A power tool includes a housing, a motor positioned substantially within the housing, a drive mechanism supported by the housing and coupled to the motor, a battery pack electrically coupled to the motor, and an isolation system. The isolation system includes an interface member positioned substantially within the housing. The interface member receives a portion of the battery pack to electrically couple the battery pack to the motor. The isolation system also includes a plurality of isolators coupled between the housing and the interface member to isolate the battery pack from the housing during operation of the power tool.

A machine tool includes a machine element, an active vibration damper arranged on a region of the machine tool for damping a vibration of the machine element, and a vibration sensor facility arranged to detect the vibration of the machine element at a first point and at a second point of the machine tool, with the vibration of the machine element to be detected being smaller at the second point than at the first point. The active vibration damper is designed to damp the vibration of the machine element as a function of a variation between a first actual value detected by the vibration sensor facility at the first point and a second actual value detected by the vibration sensor facility at the second point.

A damper assembly for use with a non-rotating tool holder includes a hollow ram for supporting a non-rotating tool and a damper assembly mounted in the hollow ram for absorbing vibrations of the ram. The damper assembly includes a front plate and a rear plate, an upper tie rod and a lower tie rod extending between the front plate and the rear plate, and a damper mass mounted between the front plate and the rear plate. Ring dampers are mounted between the damper mass and the front and rear plates, and suspension springs are mounted between the upper tie rod and the lower tie rod. The suspension springs carry the weight of the damper mass so that the ring dampers do not have to carry the weight of the damper mass, and the damper mass is free to respond to vibrations in the ram.

A fixture for a thin-walled workpiece includes two clamping devices. Each of the clamping devices has a metal carrier and a damper. The metal carrier has a carrying portion and a supporting portion, where the supporting portion has a stair portion having a plane surface and a standing surface with a slope. The damper has a metal clamping portion and a damping portion. One end of the metal clamping portion is formed as an inclined surface. The damping portion has at least two elastic layers and at least one metal layer, which are laminated in an interlacing arrangement with the same slope of the inclined surface. One of the elastic layers is disposed to connect the inclined surface. The end of the metal clamping portion connecting the elastic layer is located on the stair portion, while the opposite end of the metal clamping portion protrudes out of the supporting portion.

A feed unit for drilling and/or tapping comprising a housing, a quill in the housing movable between retracted and extended positions, the quill rotationally supporting a spindle for carrying a rotary tool, a screw for moving the quill between said positions, a ball spline shaft in the housing coaxial with the spindle, a ball spline nut having recirculating steel balls rolling in raceways on the ball spline shaft, the spindle radially supporting the ball spline shaft within the quill with zero clearance through the ball spline nut, rotation of the ball spline shaft being imparted to the spindle through the ball spline nut.

A cutter arbor damping device includes a rod body, a damping mechanism, and a heat-resistance element. The rod body includes a connecting end having a connecting hole, a receiving room, and a blocking wall between the connecting hole and the receiving room. The connecting end is adapted for being heated to expand the connecting hole to receive a cutter inserted therein wherein the cutter is positioned when the connecting end is cooled down. The damping mechanism is received in the receiving room and includes a vibration absorption portion contacting an inner wall of the receiving room. The heat-resistance element is disposed between the damping mechanism and the inner wall of the receiving room and includes at least one longitudinal protrusion and at least one longitudinal gap which are located between the blocking wall and the damping mechanism.

Apparatus for damping machining vibration of an object, the apparatus including: a plurality of rigid members to be positioned around the object to be machined, the plurality of rigid members defining an interior surface and an exterior surface; at least one flexible member positioned adjacent the interior surface of the plurality of rigid members, the at least one flexible member for contacting an exterior surface of the component; and a compressor to be positioned around the plurality of rigid members and the at least one flexible member, the compressor being arranged to compress the at least one flexible member onto an exterior surface of the object.

The present invention provides an arbor damping device, including a rod body, a damper, two flexible absorbers and at least one flexible damping adjusting member. The rod body has an internal chamber, and the internal chamber includes a circumferential wall and two end walls. The damper is received in the internal chamber. The damper includes a side surface opposite to the circumferential wall and two end surfaces respectively opposite to the two end walls. The two flexible absorbers are disposed between the two end walls and the two end surfaces respectively. The at least one flexible damping adjusting member is radially disposed between the circumferential wall and the side surface, and axially disposed between the end walls and the two flexible absorbers.