Abstract: A toolholder and insert arrangement includes an insert having a cutting portion and a shank portion disposed at a base of the cutting portion. The toolholder has a first end attachable to a spindle and a second end having a shank-receiving opening. When the toolholder is at ordinary room temperature, the shank-receiving opening is smaller than the shank portion. Upon heating of the toolholder to a predetermined temperature above the ordinary room temperature and above an ordinary operating temperature, the shank-receiving opening expands to become at least as large as the shank portion. Upon cooling of the toolholder to a temperature below the predetermined temperature and after insertion of the shank portion in the shank-receiving opening, the shank-receiving opening shrinks to generally conform to a shape of the shank portion.

Abstract: A toolholder and insert arrangement includes an insert having a cutting portion and a shank portion at a base of the cutting portion, and a toolholder having a first end attachable to a spindle and a second end having a shank-receiving opening. When the shank portion is not disposed in the shank receiving opening and the toolholder is at an ordinary room temperature, the shank-receiving opening is smaller than the shank portion, and upon heating of the toolholder to a predetermined temperature above the ordinary room temperature and above an ordinary operating temperature the shank-receiving opening expands to become at least as large as the shank portion and, upon cooling of the toolholder to a temperature below the predetermined temperature and after insertion of the shank portion in the shank-receiving opening, the shank-receiving opening shrinks to generally conform to a shape of the shank portion.

Abstract: A tool tip and tool body assembly includes a tool tip having a first end for contacting a workpiece and a second end, the second end having a patterned surface of recesses and protrusions, and at least one through hole extending through the tool tip from the second end. A tool body has a first end having a patterned surface corresponding to the patterned surface of the tool tip for mating with the patterned surface of the tool tip, and at least one threaded hole adapted to align with the at least one through hole in the tool tip. At least one fastener having a threaded end and a securing end is provided, the fastener extending through the at least one through hole such that the securing end abuts against a surface in the at least one through hole, the threaded end mating with threads in the threaded hole. Torque is transmitted between the tool tip and the tool body solely by the at least one fastener and the patterned surface of the tool tip and the patterned surface of the tool body.

Abstract: A tool tip and tool body assembly includes a tool tip having a first end for contacting a workpiece and a second end, the second end having a patterned surface of recesses and protrusions, and at least one through hole extending through the tool tip from the second end. A tool body has a first end having a patterned surface corresponding to the patterned surface of the tool tip for mating with the patterned surface of the tool tip, and at least one threaded hole adapted to align with the at least one through hole in the tool tip. At least one fastener having a threaded end and a securing end is provided, the fastener extending through the at least one through hole such that the securing end abuts against a surface in the at least one through hole, the threaded end mating with threads in the threaded hole. Torque is transmitted between the tool tip and the tool body solely by the at least one fastener and the patterned surface of the tool tip and the patterned surface of the tool body.

Abstract: A boring tool comprises a body having, at a free end thereof, two insert holders which are radially adjustable by displacement relative to a groove defined by two opposing boundary surfaces and accommodating two elongate guide lugs on the insert holders. The groove merges, at opposite, parallel edges, into first support surfaces, which are each inclined relative to the tool axis, in a preferred embodiment in a rearward-outward direction from the edge so as to form an acute-angled wedge-shaped portion of material between each of the first support surfaces and a respective groove-defining surface. The support surfaces are each adapted to cooperate with similar, second support surfaces on the holders, the other support surfaces are similarly inclined, more specifically relative to boundary surfaces of the guide lugs, at substantially the same acute angle as the angle between cooperating surfaces of the wedge-shaped portions of the tool body.