Shaft machining anti-vibration device

An anti-vibration device for machining a hollow shaft, comprising a first element constructed and arranged to be maintained at least partially within the hollow shaft in a fixed position in relation to the hollow shaft and constructed and arranged to permit the guiding of a guide bar to move axially within the hollow shaft, the first element comprising:

• at least one first mechanical vibration damper at an external periphery of the first element in relation to an internal surface of the hollow shaft and in contact with the internal surface;
• at least one second mechanical vibration damper arranged at an internal diameter surface of the first element in relation to an external surface of the guide bar and in contact with it the external surface;
• an internal circumferential cavity configured to circulate a fluid arriving via a first duct and exiting via a second duct, the first and second ducts passing through a radial thickness between the external periphery of the first element and the internal diameter surface of the first element, the internal circumferential cavity forming a hydraulic damper when a pressurized lubricating fluid flows through the first element.