Abstract: A process for loading a lathe in which a new bar to be machined is introduced laterally into a guide-bar device in form of a tube during the machining of a last piece at the end of a preceding bar. The new bar causes the ejection of the remnant of the preceding bar by pushing against the rear of the preceding bar. A device for loading a lathe with bars to be machined comprises a guide-bar device in form of a tube having two parts which can be opened for laterally introducing a new bar to be machined into the tube. The bar in the tube is fed by a hydraulically controlled push-piston. Pressure pistons press the two parts of the tube against each other in order to ensure a fluid tight seal. Return pistons are utilized radially move the upper part of the tube at the time of loading.

Abstract: The device comprises a barrel which is indexed by a multi-spindle lathe at each machining operation. The barrel comprises guiding tubes for the bars to be machined which are in rotation in a fluid delivered between the guiding tube and the bar by pipes connected by tubular shafts to a fluid distributor having inlets connected to different sources of pressure. The feed of the bar is controlled exclusively by a feeding piston under the action of the pressure of the fluid delivered by extension tubes located at the rear of the guiding tubes and maintained in alignment with the latter by sliding rings which ensure the tightness between the tubes.

Abstract: A bar stock guiding device for use with automatic lathes comprises two cushions which have the shape of semicylindrical annuli. The cushions are applied against each other in a recess of a freely rotatable sleeve. This sleeve is located between the lathe and a tube of the guiding device which contains the bar of stock fed to the lathe. The sleeve normally rotates with the bar of stock, because the opening appearing between the cushions is adjusted with minimal small free play only to avoid whipping of the bar in the cushions and the propagation of vibrations to the stock bar part extending in the working area of the tools. When the pusher passes through the sleeve, it ejects the cushions out of the sleeve recess. Before this ejection occurs, a braking mechanism reduces the speed of rotation of the sleeve to a substantial extent.

Abstract: Each guiding tube of the equipment provided to guide the different stock bars which can be machined in a given automatic lathe carries collars and a cap member. The collars and cap members of all the tubes of the equipment have the same outer diameter so that any one of these tubes can be secured by means of removable yoking beams on the semi-cylindrical seats of brackets rigidly fixed to one and the same prismatic canal which confers a great stiffness to the guiding tube fixed thereto. Owing to a pin on said cap members entering a bracket notch, bores of the collars and tube mounted in said canal automatically come to lie opposite openings of oil supply conduits to control the pusher feeding the bar to the lathe and to form an oil cushion around that bar.