Abstract: Systems, devices and methods according to these exemplary embodiments provide couplings or interfaces usable, for example, in the high speed balance testing of rotors are provided. A coupling includes a main body portion having an extended thin portion therein which is configured to fit a shaft of the balancing machine and an extended insert portion which is configured to fit an opening in the rotor. A plurality of connection elements is disposed in holes in the main body portion of the coupling and a ring is disposed over the extended insert and proximate exits of the holes in the main body portion.

Abstract: Systems, devices and methods according to these exemplary embodiments provide couplings or interfaces usable, for example, in the high speed balance testing of rotors are provided. A coupling includes a main body portion having an extended thin portion therein which is configured to fit a shaft of the balancing machine and an extended insert portion which is configured to fit an opening in the rotor. A plurality of connection elements is disposed in holes in the main body portion of the coupling and a ring is disposed over the extended insert and proximate exits of the holes in the main body portion.

Abstract: Electroerosion system (10) for the production of a cavity (22) or a shaped hole in an element (20) to be processed, the system (10) comprises a tank (12) containing a dielectric fluid (14) and an electrode (16) connected to an electric power supply system (18) to supply a high voltage to the electrode (16) and to produce a series of electric discharges on the element (20) which is immersed together with the electrode (16) in the dielectric fluid (14), in order to obtain a surface erosion thereof, forming the cavity (22), the system (10) comprises ultrasonic vibration means (30) capable of transmitting a series of ultrasonic waves at a varying frequency to the dielectric fluid (14).