Abstract: A punch assembly includes a punch body having an axis and a replaceable punch tip configured for a punching operation, e.g., in a punch press apparatus. A laterally manipulated coupling pin is provided to selectively engage the punch tip with the punch body along the axis, and to selective disengage the punch tip from the punch body.

Abstract: A screwdriver head mounting structure includes a mounting base, a screwdriver head, a latching member and an elastic member. The mounting base defines a mounting hole and an eccentric latching hole communicating with and positioned eccentric to the mounting hole. The screwdriver head is detachably assembled to the mounting base. The screwdriver head has a latching end inserted into the mounting hole of the mounting base. The latching member is releasably and adjustably assembled to the mounting base together with the elastic member. The latching member passes through the eccentric latching hole and latches with the latching end of the screwdriver head.

Abstract: It is an object of the invention to provide a tap holder in which even when an error is brought about in synchronizing spindle feeding and rotation of a tapper body and a tap collet of a tap holder in correspondence with a machine tool spindle, the synchronization can be established by absorbing the error by a simple constitution. As means therefor, the tap holder is characterized in that a tapper body and a tap collet are inserted by a locking member at portions of the tapper body and the tap collet overlapping each other, and the tap collet is fixed to the tapper body by engaging the locking member with at least one of the tap collet and the tapper body in a state of being interposed with an elastic member on both sides thereof in an axial direction X.

Abstract: An apparatus is disclosed for releasably holding a toolholder shank having a lockable surface and a releasable surface utilizing an actuating bolt with an associated threaded actuating nut. When the actuating bolt is rotated in a locking direction, the actuating nut is drawn onto the bolt thereby clamping against the lockable surfaces of the toolholder shank. When the actuating bolt is rotated in the releasing direction, a releasing segment acts upon the toolholder thereby ejecting it from the tool support member.

Abstract: The present invention relates to a copying cutter provided with a cylindrical or conical body having a spherical end, constituting the active portion of the cutter, said end including a plurality of flutes inclined at a determined angle .theta. relative to the longitudinal axis of the cutter and formed along circular arcs at a determined distance x from the midplane P of the cutter, an inside face and an outside face of each of the flutes constituting, after machining, respectively a cutting face and clearance faces of each tooth of the cutter.The clearance faces comprise a first clearance face and an additional clearance face presenting at least a first facet. The cutting face has a cutting angle .gamma. given by the following equation: ##EQU1## where R is the radius of the cutter. The present invention also relates to a method of manufacturing the cutter.

Abstract: A rapid securement device for a tool or workpiece holder, comprising an elongated stem, and an elongated axle extending through the stem for axial movement relative to the stem. The stem has a head thereon, the head having a hole therethrough that registers with holes through the stem. A peg for holding a tool or a workpiece holder extends through the holes and has a flat surface that engages with a flat surface on the head. A spring urges the axle in a direction relative to the stem to engage the flat surfaces forcibly together thereby releasably to retain the peg in the holes.

Abstract: The present invention relates to a method for attaching a shell-type milling cutter wherein an area for fastening the shell-type milling cutter to its cutter arbor is increased to raise rigidity and attachment strength thereby making high-speed and heavy-duty cutting possible, so that the cutting efficiency thereof becomes substantially identical to that of an integral structure type milling cutter, besides exchange of the milling cutter can very simply be attained.The method for attaching a shell-type milling cutter according to the present invention is conducted by such a manner that the inside diameter portion of a shell-type milling cutter is formed into a tapered hole, and a bush is forcibly inserted in a gap defined between the tapered hole and a fitting shaft of a cutter arbor, whereby the milling cutter is fixed to the cutter arbor.

Abstract: An elastic ring for maintaining a pin in a hole formed in a socket and work drive shaft of a rotary tool. The ring has integral fingers which project into the ends of the hole so that the pin cannot dislodge the ring by centrifugal force when the tool is operating at high speed. Several variations of the ring include weighted areas at portions of the ring midway between the fingers, which areas counterbalance centrifugal force on the ring to supplement holding force of the fingers upon the pin.

Abstract: When inserting a locking wedge (14) having planar wedge surfaces (16, 17) between an anvil (4; 5) and a hammerhead (1) or an anvil block lining (6) the wedge (14), which is provided with a draw head (18; 22) is drawn in between two mutually converging locking surfaces (9, 7) on the anvil and the hammerhead or the anvil block insert.

Abstract: A crystal seed holder assembly for retaining a crystal seed used to grow a ribbon of crystal by the EFG technique is disclosed. The holder assembly is arranged so that the seed is not subjected to fastener stress, can expand without thermal stress and can slide a limited distance relative to the holder assembly.

Abstract: A tool mounting for a planing machine in which the cutting tools are exposed to high tangential forces. The tool is held on a rotary drum by a wedging action so as to be more readily replaced. The tool may comprise separate adapter and cutter bit components, or in the form of a one-piece member. The tool adapter includes a projection extending from an end opposite from the cutting tool. The projection includes a first contact surface and the mounting includes a second contact surface located outwardly from the first contact surface which first and second contact surfaces converge toward one another. In this way, the first and second contact surfaces cooperate with corresponding surfaces on the cutting head to wedgingly secure the adapter thereto.