Abstract: The refacing of worn brake disks of vehicles is carried out on the vehicle itself by connecting an outer drive with the disk (27) or with the shaft (42) on which the disk is mounted. This provides for the correct positioning of the machining tools (20, 21) with respect to the disk (27) allowing to effect the refacing on the vehicle (40). Two adjustable tools (20, 21) fixed on a common transverse carriage (16) machine simultaneously two faces of the disk (27). Coupling and centering devices (24) are arranged on either side of the refacing device (5) and may be coupled consecutively with the disk on the two sides of the vehicle.