Abstract: A holder for bar stock being fed to a turning machine includes bar stock holding V-shaped trough, and a top guide assembly mounted to a floor-mounted frame through frame-mounted slides that are vertically slidable on the frame in opposite directions. A horizontally-extending adjusting-cam rail is horizontally slidably mounted to the frame. It has inclined keys thereon received in keyways in horizontal cylinders mounted in the vertically movable slides so that, upon linear adjustment of the cam rail, the trough mounting slides and the guide mounting slides are vertically moved simultaneously but in opposite directions to adapt the apparatus to different sizes of stock, but without changing the location of the centerline of the stock to be fed to the turning machine. A handwheel operated screw adjusts the cam rail. A parallelogram linkage and operating handle provide for quick guiding control of new stock after loading into the trough from above the trough.