Abstract: A rotary machining system is presented which uses a housing, a combined spindle and cutting disk, a source of high pressure fluid, a hydraulic line, a needle valve, a carbide ball and a carbide socket to machine superalloys and other difficult-to-machine materials and alloys at high speeds. The hydraulic lines and fluid source provide high pressure fluid through an aperture of the carbide socket into the housing to float the spindle. This fluid acts as a hydrostatic thrust bearing as it separates the spindle from the walls of the housing. Since the spindle and cutting disk are a single unit which are not physically attached to a roller bearing mechanism, they may be quickly and easily inserted and removed to minimize the "down time"0 of the system when the cutting disk needs to be replaced or ground to a sharp edge.

Abstract: The multiple-channel guiding device for bar-loaders of automatic machine tools comprises an elongated body, peripherally defining a plurality of grooves with different diameters and being rotatable about its own longitudinal axis so as to move one of the grooves to a loading position aligned with the work axis of the machine tool; a plurality of covers co-operating with the grooves so as to define, in their closure position, respective guiding channels for the bar to be machined, the covers being openable to insert the bar; a chute for inserting the bar in the guiding channel arranged in loading position; a bar pusher element slidably actuated inside the channel to advance the bar toward the machine tool.