Abstract: A ball end mill in which a ball end cutting edge (3) has a convex shape in a tool rotation direction with respect to a line connecting a rotation center (O) and a radially outer end (3o) of the ball end cutting edge (3), in a front view of the tool. In the ball end mill, a rake angle (?) of each portion of the ball end cutting edge (3) is set in a range from ?10° to 0°, and the negative value of the rake angle (?) is increased from a tip of the ball end cutting edge (3) and a radially outer end (3o) of the ball end cutting edge (3) toward a middle point in the radial direction, and is maximized at approximately the middle point in the radial direction.

Abstract: Disclosed is a cutting tool holder for mounting a cutting insert having a top face, a bottom face and an insert bore having an inner surface extending between the top and the bottom faces. The holder includes a seat having a bottom surface and at least one side wall angled to the bottom surface, a seat bore with a bore axis having an open end at the bottom surface of the seat, and a securing mechanism for securing the cutting insert in the seat. The securing mechanism includes a securing pin within the seat bore and a body with an outer surface extending between a proximal end and a distal end of the body. The securing mechanism includes a displacement arrangement separate from the securing pin for axially displacing the securing pin along the bore axis of the seat bore between a first, mounting position and a second, securing position.

Abstract: An indexable, invertable cutting insert has radially-oriented positioning segments on a front face of the insert and radially-oriented positioning segments on the back face of the insert. The radially-oriented positioning segments are shifted on the front face relative to those on the back face such that, when the cutting insert is engaged within the toolholder, the cutting segment utilized on the front face will never be directly opposite the cutting segment utilized on the back face. A toolholder system is made up of the cutting insert and a toolholder capable of securing and indexing the cutting insert.

Abstract: A segmented orbital drill includes a segmented portion with a semi-finishing cutting portion and a plurality of finishing cutting portions. The semi-finishing cutting portion and finishing cutting portions are separated by grooves formed by a front wall and a rear wall. The segmented portion allows for a fresh cutting edge (i.e., rear wall of the groove) to be revealed as the orbital drill wears in the axial direction. The segmented portion also causes less contact with the workpiece, which reduces power consumption and minimizes deflection of the orbital drill. The segmented orbital drill also includes an optional pilot at one end of the drill, and a clearance neck portion between a shank and the segmented portion. A method of machining a workpiece using the segmented orbital drill is also disclosed.

Abstract: An interlocked assembly of a circular collar receivable in suspension within a sink drain fitting and an annular support slidably engaged to the collar cooperate to form a guide aligning the blade of a rotary cutting tool adjacent the seat of a retaining ring that holds the fitting in place. The sliding translation of the annular support within the collar is limited by a radially projecting ring to limit the penetration depth of the rotary saw blade mounted in the guided tool thus limiting the incidence of damage to the surrounding sink structure.

Abstract: A cutting tool includes a body having a forward end and a rearward end. The forward end includes an insert-receiving pocket with a threaded hole having a center axis. The cutting tool further includes a cutting insert with a countersunk bore with a center axis. The cutting tool includes an error proofing feature for preventing the cutting insert to be properly mounted in an insert-receiving pocket when an offset distance between the center axis of the threaded hole of the insert-receiving pocket and the center axis of the countersunk bore of the cutting insert is greater than a predetermined percentage of the outer diameter of the threaded screw.

Abstract: A cutting tool of the present invention includes a cutting insert and a holder having at a front end part thereof an insert pocket for attaching the cutting insert. The insert pocket includes a seating part including a seating face which is brought into contact with the lower surface of the cutting insert, and is inclined forward in a rotation direction of the holder as the seating face separates from the front end part of the holder; and a constraining part brought into contact with first and second side surfaces adjacent to each other among the side surface of the cutting insert.

Abstract: One embodiment includes an electrode dressing apparatus having a rotatable dressing blade including a first cutting face, an electrode comprising an electrode body and a weld face, and an electrode guide positioned absolutely relative to the rotatable dressing blade to position the weld face of the electrode at a designated location over the first cutting face.

Abstract: A machine tool comprising a machine frame having dimensionally rigid side walls, each including top-side horizontal guide rails. A compound slide is displaceable in or on the guide rails. On the front of the compound slide is a machining unit comprising a spindle head which is vertically displaceable. A workpiece mounting unit is disposed in the space between the side walls. The workpiece mounting unit may have a workpiece table or a workpiece chucking device. In order to form an enlarged access to the work area of the machine tool, one side wall is shorter at the front than the other side wall. Further, the linear guides or guide rails mounted to the side walls of the machine frame may be aligned at an acute angle ? to the vertical center plane of the machine frame.

Abstract: Multispindle lathe comprising a machine frame (12), a spindle drum (14) which is arranged in the machine frame (12), is rotatable about a spindle drum axis (16) and is made up at least partially of segments (80) which are cut out from flat material in a stacking direction (82) parallel to the spindle drum axis (16) and extend in stacking planes (88) transverse to the stacking direction (82), these segments having receiving cutouts (90) and cooling channel cutouts (92, 96, 106) which overlap with one another such that the spindle drum (14) has spindle motor receptacles (30) for spindle motors (32) and a cooling channel system (120, 130, 180) separated therefrom by wall webs (98), characterized in that the cooling channel system has several channel subsystems (120, 130, 180) for a liquid cooling medium which are fed in parallel.

Abstract: A milling machine has a base, a work platform mounted movably on the base, and a ruler mounted on the work platform. The work platform is movable relative to a base axis. The thermal compensation system includes a sensor and a control unit. The sensor is configured to be mounted on the base for sensing a position of each of the work platform and the ruler relative to the base axis. The control unit is coupled to the sensor, and determines a work platform displacement and a ruler displacement according to the positions sensed by the sensor. The control unit further calculates a compensation value based on the work platform displacement and the ruler displacement. The control unit is configured to correct the position of the work platform relative to the base axis according to the compensation value.

Abstract: A drill, including: a substantially columnar drill holder including, at a front end portion thereof, a first insert pocket and a second insert pocket formed closer to the outer periphery of the drill holder than the first insert pocket; a first insert which is attached to the first insert pocket and includes a first cutting edge at an intersection of an upper face and a side face; and a second insert which is attached to the second insert pocket and includes a second cutting edge at an intersection of a upper face and a side face. The first insert pocket is located passing through a central axis of rotation of the drill holder. The second cutting edge has a concave shape when viewed from the front end side of the drill holder, and has a curved line at least a part thereof.

Abstract: A cutting insert for use in a chipforming material removal operation that includes a cutting insert body, which has a seating surface, a flank face, and a corner cutting region at the intersection of a peripheral edge and the flank adjacent corresponding corners thereof. The cutting insert body contains a central aperture. The seating surface contains a coolant delivery trough, which has a radial orientation toward a corresponding corner cutting region. The coolant delivery trough has a radial outward end terminating at the peripheral edge and a radial inward end opening into the central aperture. There are a pair of lateral topographic regions wherein the one lateral topographic region is along one side of the coolant delivery trough and the other lateral topographic region is along other side of the coolant delivery trough.

Abstract: A long shaft inner surface machining apparatus of the present invention includes: a long shaft support device 10 that fixes a long shaft 1 so as not to bend; a machining head 20 capable of being inserted into the prepared hole 2 of the long shaft 1 in the axial direction; a head support device 30 that is coupled with the machining head 20 from one end of the long shaft 1 through the prepared hole 2 and moves the machining head 20 in the axial direction; and a blade drive device 40 that is coupled with the machining head from the other end of the long shaft 1 through the prepared hole 2 and rotary-drives the blade 29 around a shaft axis.

Abstract: A cutting insert has a top surface and a bottom surface having a parallelogram shape, and four side surfaces connecting the top and bottom surfaces. One or more primary cutting edges are formed at intersections between the top and bottom surfaces and two opposing side surfaces. Secondary cutting edges are formed at intersections between the top and bottom surfaces and two other opposing side surfaces. The primary cutting edge forms a first angle with respect to a median plane parallel to the top and bottom surfaces. The secondary cutting edge forms a second angle with respect to the median plane. The top and bottom surfaces have a mounting surface and a rack surface, wherein the rack surface extends inwardly from the cutting edge toward the median plane. The top and bottom surfaces of the cutting insert have mirror symmetry with respect to the median plane.

Abstract: Provided is a tool tight-contact-state detector for a machine tool which is capable of accurately and stably detecting whether or not a tool or a tool holder having the tool attached thereto is mounted to a main spindle in tight contact therewith. While rotation of a main spindle (13) is stopped, hydraulic pressure is supplied from a hydraulic pressure supply unit (28) to a cylinder section (20) so as to bring a piston member (21) to into contact with a main spindle head (11) and the main spindle (13) against a biasing force from an O-ring (22). Air is thereby allowed to be supplied to air ejection holes (27a, 27b, 27c), which are formed in a forward end face (13a) of the main spindle (13), from the main spindle head (11) side through the piston member (21).

Abstract: An apparatus and method for removing a fitting from a pipe having a central axis. The apparatus includes a guide member which defines a guide passage and a means for supporting the guide member within at least a portion of the pipe with the longitudinal axis of the guide passage in a coaxial relationship with the central axis of the pipe. The apparatus also includes a rotary hole saw having a cylindrical wall provided with a plurality of cutting teeth on an open end thereof and a central axis of rotation. The cylindrical wall defines a cylindrical chamber. A guide rod is connected to the rotary hole saw such that the guide rod extends through the cylindrical chamber of the hole saw and beyond the open end thereof in coaxial alignment with the central axis of rotation. The guide rod is slidingly receivable in the guide passage of the guide member.

Abstract: A toolholder has a head portion including a slot separating the head portion into a lower extension with a lower seat and an upper extension with an upper seat to retain a cutting insert. The head portion contains a coolant entrance passage, which receives coolant from a coolant source, and a coolant delivery passage, which discharges coolant toward a cutting insert. The cutting insert includes a top surface with an upwardly extending protuberance that can be engaged by the toolholder to rigidly mount the cutting insert in the head portion of the toolholder. The cutting insert further includes a coolant channel formed in the top surface of the cutting insert that is positioned directly opposite of the coolant discharge to enhance the flow rate of the coolant delivered to the cutting insert-workpiece interface.

Abstract: A cutting assembly that includes a holder containing a coolant delivery passage, and a locking pin, which has a longitudinal locking pin bore in communication with the coolant delivery passage. A clamp assembly attaches to the holder and engages a cutting insert. The clamp assembly has a diverter plate with an integral boss, which has a central boos bore, and an interior passage wherein the central boss bore is in communication with the interior passage. The longitudinal locking pin bore opens to the central boss bore whereby coolant flows into the central boss bore and to the interior passage exiting the interior passage toward the cutting insert.

Abstract: A rotary face plate is simply configured by including only a machine mechanism for rotating it on its axis. In order to achieve the configuration, a swing arm for a rotary blade is mounted on one side of the rotary face plate whereas a driving motor and a swing motor for the rotary blade in each of the swing arms are independently mounted on each of the swing arms on the other side. One side has only a function of rotating and cutting on the boundary of the face plate, and therefore, cutting chips can be remarkably readily removed. Only a rotating motor for a drive source is mounted on the other side. As a consequence, a round tube or a square tube having a square cross section can be cut only by controlling the motor for rotating the rotary face plate at a required angle.