The work shown at A in Fig. 6 is a malleable iron bearing retainer for an automobile. The casting is held by the outside in a three-jawed chuck; the machine on which the operations are performed is a horizontal turret lathe. The piece is completely finished in one setting. As the cut-off slide front tool carrier was used during the progress of the work, it was found necessary to design the recessing tool so that it extended out over the slide. It is evident that an overhang as great as this would cause trouble unless some means of intermediate support were provided. The bracket 8 was therefore used on the rear of the cut-off slide, the portion T being cut out to the radius of the bar so as to act as a support and at the same time provide the feed motion necessary (through the reverse feed of the slide) to force the tool into the work. The cutting tool C is of round section properly shaped at the end to form the required groove B. It is secured in place in the bar E by the set-screw D; radial adjustment is secured through screw U. The rear end of the bar is shouldered and fitted to the sliding bracket F; the set-screw P holds it in place. The slide F is dovetailed and is gibbed to the fixed bracket G by the gib Q which is adjusted for wear by the screws N. The lug H at the end of the slide is provided with a stop-screw J which permits close adjustments to be made for the depth of cut. This lug is not shown in the lower view but it is set slightly to one side of the cored groove 0 so that the screw will bear against the solid portion. The bracket G is mounted on the dovetail of the turret and is held in place by the gib R. The special screw M is shouldered to receive the coil spring L which thrusts against it and against lug K on the slide. The strength of the spring may be easily adjusted by the screw to the desired compression. The screw V is simply used to limit the reverse movement of the slide, so that it will not move back too far before or after the work has been done. This device was used for three different pieces by simply changing the tool and regulating the stop-screw. Its performance was thoroughly satisfactory.

Fig. 6. A Recessing Tool for an Automobile Bearing Retainer.