Abstract: A device for the advancement of bars, particularly narrow bars, in automatic loaders provided with a inclined supporting plane or with another loading system for a plurality of bars and with a mechanism for the individual release of the bars, comprising: guides, whereon supporting elements for a bar released from the plane and a carriage provided with grip elements for a bar can slide, the carriage being actuated between an initial position, where the grip elements are actuated so as to grip a bar deposited on the supporting elements, and a final position, where the bar is released by the grip elements and is secured in the spindle of an automatic lathe; a pusher which is supported so as to move parallel to itself; and actuators for actuating the pusher after the carriage between an offset position and a position wherein it is aligned with the bar deposited on the supporting elements when the carriage is in the final position.

Abstract: The bar-pusher actuation device for bar feeders applied to machine tools includes a linear actuator composed of a chain with which the bar-pusher is associated and which is closed around a pair of fixed pinions and a pair of gearwheels which are movable with respect to the pinions. The pair of gearwheels is mounted on a slider which is slidable parallel to the direction of advancement of the bar. The slider is actuated by a jack adapted to perform a reciprocating stroke which substantially corresponds to the length of the portion of bar to be machined.

Abstract: The device for inserting polygonal and shaped bars in the collet of the chuck of machine tools comprises a bar pusher element arranged inside a bar guiding channel and a motor element connected to a worm screw which cause sliding of a slider rigidly associated with the bar pusher. The device has a spring mounted in abutment against the worm screw and adapted to be compressed when the bar rests frontally on the collet of the rotating chuck, so as to absorb the thrust of the motor and to press the bar against the collet, and a motor switch activated by the compression of the spring until the rotation of the chuck causes the chuck to be brought angularly in step with the bar and the bar to be inserted in the collet.

Abstract: The box-like elongate main housing or body for automatic bar loaders/feeders comprises a lower portion carried on a bed and an openable upper portion. Each portion is comprised of an inner half-jacket, an outer half-case, and an intervening blanket of a sound-deadening and cushioning material. The two portions are arranged for sealed closure to enclose in the cavity defined between the half-jackets thereof a longitudinal bar guide, the cavity being connectable to a filling and oil lubricating system.

Abstract: The invention relates to a device for inserting bars into a tube, in particular the so-called bar guide tube of a lathe. The device comprises a carriage mobile parallel to a guide arranged to support a bar in a position aligned with the tube. The carriage is provided with an appendix which intersects the guide, such that during a first stroke of the carriage, said appendix thrusts against the rear end of the bar in such a manner that this latter becomes partly inserted into the tube. The carriage also comprises a bar thrust rod mounted mobile relative thereto so that it can be disposed along the guide and aligned with the bar, so that the bar becomes completely inserted into the tube during a second stroke of the carriage.