Abstract: An improved vibration attenuator for reducing undesired vibrations generated by cutter bits being drawn across the faces of a rotating brake rotor. The attenuator has friction pads with engagement members that extend therefrom which are configured to cause force to be exerted on the sides of fasteners that affix the cutter bits to the cutter arms in a direction parallel to the surface being machined and perpendicular to the direction of rotation of the rotor.

Abstract: An improved vibration attenuator for reducing undesired vibrations generated by cutter bits being drawn across the faces of a rotating brake rotor. The attenuator has friction pads with engagement members that extend therefrom which are configured to cause force to be exerted on the sides of fasteners that affix the cutter bits to the cutter arms in a direction parallel to the surface being machined and perpendicular to the direction of rotation of the rotor.

Abstract: A gyration/reciprocating action switching mechanism. The mechanism includes an output shaft, a first clutch mounted on said output shaft, and a second clutch mounted inside the first clutch and coupled to the output shaft. A torsional force adjustment mechanism is mounted on a speed reduction mechanism of a power hand tool. The mechanism further includes a gyration adjustment device. The rotation of the gyration adjustment device to a lower limit position forces the first axle sleeve of the first clutch into engagement with the second axle sleeve of the first clutch to shorten the stroke of the output shaft, causing the first cam to be disengaged from the second cam by the spring force of a coil spring of the second clutch, enabling the coil spring of the second clutch to be compressed to force the first cam into contact with the second cam and to let the output shaft be reciprocated upon pressing of the output shaft against an object.

Abstract: A vibration attenuator for use in the machining of irregularly worn disc brake rotors. A pair of pads are arranged to rest upon lathe cutter bits acting against the opposite faces of the rotor. The pads are biased inwardly so that the rotation of the rotor forcibly urges the pads against the cutter bits and against the adjacent rotor surfaces for damping vibrations of these structures. Pins on the pads engage the cutter bits so that the pads move with the cutter bits as the machining operation proceeds, thereby maintaining damping engagement throughout the operation.