Abstract: A workpiece having a bore, and a counterbore which is frusto-conical and tapers forwardly between a side of the workpiece and the bore, and toward the bore, a metallic rivet having an axially extending shank received in the workpiece bore and defining an axis; the rivet including a head having an end face and a forwardly tapered frusto-conical section located forwardly of the end face; the periphery of the head end face being substantially flush with the work surface, the end face forming a dome protruding axially in a rearward direction, the dome being generally ring-shaped and extending about the axis in substantially axial alignment with the outer surface of the shank; the rivet head having a peripheral side wall spaced radially from a side wall defined by the workpiece counterbore, and the space between the side walls having a volume A; the dome having a metallic volume B; and wherein the volume B exceeds volume A, such that when the dome is flattened during rivet deformation, the rivet head side wall is

Abstract: Tooling to form a countersink or counterbore in a workpiece, the countersink or counterbore intersecting a bore hole in the workpiece, comprises a first part defining an axis to extend axially forwardly in the bore hole; a carrier body having a forward portion for piloting reception in the bore hole, and having a rearward portion adjustably carried by the first part; a cutter blade on the carrier, the blade projecting radially relative to the carrier body and forming at least one cutting edge shaped to form the countersink or counterbore; and a spacer on the carrier body and adjustably retained between the first part and the blade for holding the blade in predetermined axial position on and relative to the carrier body.

Abstract: Tooling to form a countersink and counterbore in a workpiece includes:(a) a first part defining an axis and that extends axially forwardly in a bore hole in the workpiece,(b) a rotatable carrier connected with that first part,(c) and a cutter blade on the carrier, the blade projecting radially relative to the first part forming at least one cutting edge spaced outwardly of a cylinder defined by that first part, the cutting edge shaped to form the countersink and counterbore at one end of the bore hole.

Abstract: Tooling to form a countersink and counterbore in a workpiece includes:(a) a first part defining an axis and that extends axially forwardly in a bore hole in the workpiece,(b) a rotatable carrier connected with that first part,(c) and a cutter blade on the carrier, the blade projecting radially relative to the first part forming at least one cutting edge spaced outwardly of a cylinder defined by that first part, the cutting edge shaped to form the countersink and counterbore at one end of the bore hole.