Abstract: A combined structure of an arbor and an arbor seat, including: an arbor, having a first assembling portion which has at least one first hole, each first hole having a first central axis; an arbor seat, having a second assembling portion which is disposed in the axial direction, and the first assembling portion and the second assembling portion being insertably connected with each other, the second assembling portion having at least one second hole which has a second central axis, when the first and second assembling portions are connected with each other in the axial direction, each second central axis is noncoaxial and nonoverlapped with the at least one first central axis; and wherein at least one said fastener is inserted into one said first hole and one said second hole, and urges one said first hole and one said second hole in axially opposite directions.

Abstract: 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.

Abstract: A combined structure of an arbor and an arbor seat, including: an arbor, having a first assembling portion which has at least one first hole, each first hole having a first central axis; an arbor seat, having a second assembling portion which is disposed in the axial direction, and the first assembling portion and the second assembling portion being insertably connected with each other, the second assembling portion having at least one second hole which has a second central axis, when the first and second assembling portions are connected with each other in the axial direction, each second central axis is noncoaxial and nonoverlapped with the at least one first central axis; and wherein at least one said fastener is inserted into one said first hole and one said second hole, and urges one said first hole and one said second hole in axially opposite directions.