Abstract: A lubricating system is provided at a junction of relatively rotatable members of an engine in an environment where oil comes into contact with the external surface of the rotatable members. The junction includes a relatively rotatable member provided with a bore and pin extending through the bore. The pin is snugly received in the bore so that rotation between the pin and relatively rotatable member may occur. An example of such a system is provided by the wrist pin connection to a piston. According to the invention, within the bore are recesses spaced inwardly and separated from both ends of the bore and arranged diametrically opposed to each other on a line transverse to the principal linear movement of the wrist pin. A pocket for oil is provided by each of the recesses between the bore of the rotatable member and the pin for accumulation of oil to lubricate between the surfaces of the pin and bore.

Abstract: Selected circumferential and axial profiles are formed simultaneously on a rotating workpiece by apparatus that comprises a carrier that is mounted for movement toward and away from the workpiece and carries a cutting element which is pushed by a spring into engagement with the workpiece. The carrier simultaneously follows a circumferential cam that rotates conjointly with the workpiece and an axial cam that is mounted on a follower bar. The follower bar is mounted on the carrier for movement relative to the carrier solely along an axis parallel to and spaced from the axis of rotation of the workpiece.