Abstract: An insert adaptor is configured for providing secure clamping of an insert in an insert pocket. The insert adaptor is configured to be located between an insert and an insert pocket and includes at least one magnetic surface configured for applying a magnetic attraction force to the insert pocket or a shim.

Abstract: A tool adaptor has a front retaining portion and a rear mounting portion, the front retaining portion having a base jaw, a clamping jaw, and an insert receiving pocket located therebetween, and the rear mounting portion having a rear mounting surface and a first fastening bore. A primary slot separates the base jaw from the clamping jaw and communicates with the insert receiving pocket, and a secondary slot transverse to the primary slot separates the clamping jaw from the rear mounting portion. The first fastening bore has a first bore axis which intersects the rear mounting surface and the secondary slot. A cutting tool assembly includes a tool shank, and the tool adaptor secured to a front mounting portion of the tool shank by means of a first fastening screw occupying the first fastening bore and a first shank bore of the front mounting portion.

Abstract: A blade portion for a grooving tool includes opposite first and second surfaces, a blade width thereof being defined as a shortest distance between the first and second surfaces, opposite third and fourth surfaces, and a fifth surface and an opposite blade portion end. The blade width is constant or substantially constant from the fifth surface up to the blade portion end. An insert seat separating the third surface and the fifth surface is arranged to receive an insert having a main cutting edge, an associated rake face, and an associated main clearance surface. The main cutting edge defines an insert width being greater than the blade width. A shortest distance from the fifth surface to the opposite blade portion end is greater than a shortest distance from the third surface to the fourth surface.

Abstract: A face grooving tool body includes a blade portion having a top surface and an opposite bottom surface, a first side surface and an opposite second side surface, and a front end and an opposite rear end. A longitudinal axis of the blade portion coincides with a primary cutting feed direction of the blade portion. An upper blade portion is associated with the top surface and a lower blade portion is associated with the bottom surface, the upper and lower blade portions being separated by a slit. The second side surface of the lower blade portion is curved around a second side surface axis of curvature parallel to the longitudinal axis. A key hole is formed in the blade portion. The slit includes a slit portion that has the shape of a concave function in a side view.

Abstract: A grooving insert includes a front surface and an opposite rear surface, a first side surface and an opposite second side surface, and a top surface and an opposite bottom surface. The top surface includes a top front portion and a top rear portion, the top front portion having a cutting edge arranged symmetrically relative to a first plane. The bottom surface is symmetrically arranged in relation to a second plane, the first plane and the second plane forming an angle (?) of 0.5-5.0° relative to each other.

Abstract: A holder for a tool for machining a workpiece, wherein the holder comprises a cutting insert receptacle in the region of its front end for receiving a cutting insert and a clamping portion in the region of its opposite rear end for clamping the holder in a machine tool. The cutting insert receptacle comprises an upper and a lower clamping jaw, wherein the holder comprises an upper part on which the upper clamping jaw is arranged, and a lower part on which the lower clamping jaw is arranged. The upper and the lower parts are connected together exclusively by means of a web which extends between a first and a second separating slit, wherein the two separating slits extend between the upper part and the lower part of the holder and are arranged on opposite sides of the web such that the upper part is pivotable relative to the lower part via the web in the manner of a rocker. The first separating slit extends in a front holder region between the cutting insert receptacle and the web.

Abstract: A cutting tool for radial and axial recessing and for lateral motion for so-called grooving of primarily metallic materials, having a clamping holder and a cutting element base, fastened to the clamping holder, on which a cutting element rests, the cutting element being pressed onto the cutting element base by a clamping finger of a clamping claw, and the cutting element being guided on the cutting element base with a prism.

Abstract: A cutting insert has a cutting edge formed at an intersection of a rake surface and a relief surface, with a chip-control arrangement located at the rake surface. The chip-control arrangement includes a depression that includes a depression declining surface that extends downwardly in a direction away from the major cutting edge. A chip deflecting surface located rearward of the depression is inclined upwardly in a direction away from the major cutting edge. A chip former includes an interposed projection that extends from the chip deflecting surface to the depression declining surface, and two lateral protuberances that extend from opposite sides of the interposed projection to the depression declining surface beyond a forwardmost portion of the interposed projection.

Abstract: According to one embodiment, a connector includes an insulator and a contact terminal in which an end side is pressed into a counter-press-fit portion of the insulator, and the other end side comprises a soldered portion attached to a substrate with soldering. The contact terminal comprises a flux accumulation portion inside the counter-press-fit portion and/or in an extended end portion of the soldered portion.

Abstract: A cutting insert including a first end surface, a second end surface and a peripheral side surface extending therebetween. The first and second end surfaces each having one substantially quadrangular portion and two substantially semicircular portions which are respectively joined to two opposing sides of the substantially quadrangular portion. An intersecting edge between each of the first and second end surfaces and the peripheral side surface is provided with a cutting edge. The cutting edge is formed in at least part of the substantially semicircular portion. At least part of a portion of the peripheral side surface which is adjacent to the substantially quadrangular portion of each of the first and second end surfaces, and at least part of a portion of the peripheral side surface which is adjacent to the substantially semicircular portion, each have a function of coming into contact with an insert seat.

Abstract: A cutting tool includes a replaceable cutting insert and a tool body. The tool body includes a tool body surface and an insert pocket recessed therein. The cutting insert is releasably retained in the insert pocket. The tool body includes at least one coolant duct that has an outlet orifice that opens out in a coolant chamber. The coolant chamber is bounded on a side opposite the outlet orifice by a coolant deflection portion that is integrally formed with the tool body in a unitary one-piece construction and at least partially overhangs the outlet orifice in a direction towards the insert pocket. The coolant deflection portion has a chamber deflection surface configured to deflect a coolant in the direction of a cutting edge of a cutting insert seated in insert pocket.

Abstract: Inclined surfaces are formed on a rake face and a recessed groove is formed in the central portion between the inclined surfaces. A groove width of the recessed groove gradually increases from the position of the end cutting edge toward the rear, then gradually decreases such that the recessed groove has a narrowest portion at a position P2 forward of the position P3 of an upper end of a breaker wall and rearward of a positive rake angle rear end position P1, and then gradually increases toward the rear up to the position P3 of the upper end of the breaker wall. The dimensional relation W1<W2<W3 holds, where W1 is the groove width at the end cutting edge, W2 is the groove width at the narrowest portion, and W3 is the groove width at the position P3 of the upper end of the breaker wall.

Abstract: A cutting insert of one aspect includes a main body section and a cutting section located in front of the main body section. The cutting section includes a front cutting edge disposed along a ridge line of the cutting section at an intersection between a top surface and a first side surface; and a lateral cutting edge disposed along the ridge line at an intersection between the top surface and a second side surface and inclined with ascending as getting away from the front cutting edge. The lateral cutting edge each includes a first region and a second region located to a rear of the first region; and an angle of inclination of the second region with respect to the bottom surface is larger than an angle of inclination of the first region with respect to the bottom surface.

Abstract: The invention relates to a tool holder (10) for a cutting insert (18), having a shank (12), a counter bearing (14) on which a pocket (16) for a cutting insert (18) is provided, disposed on the front end of the shank, and a clamping segment (20) integrally joined to the shank (12) via a bending segment (22); wherein the clamping segment (20) has a clamping finger (28) and a clamping element (26) such that the clamping finger (28) is capable of acting against the counter bearing segment (14) by means of the clamping element (26), thereby enabling a cutting insert (18) to be clamped between the clamping finger (28) and the counter bearing segment (14); wherein the clamping segment (20) protrudes beyond the top side of the shank (12); and wherein a coolant supply passage (40, 42, 44, 46) extends through the shank (12) and the bending segment (22) into the clamping segment (20); wherein the coolant supply passage (40, 42, 44, 46) has a shank passage (46), a clamping finger passage (40), and a connecting passage (4

Abstract: A cutting tool comprising a holder (12) having a slot-shaped, arcuate receptacle (16), with respectively a lower and an upper bearing surface (36, 38) attached to rigid clamping jaws (18, 20) of the holder (12), for the reception (16) of a cutting insert, (14) and a cutting insert (14) having an arcuate shank (22) with lower and upper locating face (32, 34), which cutting insert is arranged exchangeably in the receptacle (16), and having a cutting head (24) with cutting edge (26), which cutting head is disposed on a workpiece-side end (44) of the shank (22), wherein the arcuate receptacle (16) and the arcuate shank (22), measured respectively on the lower bearing surface (36) of the receptacle (16) and the lower locating face (32) of the cutting insert (14), extend respectively over at least 90°, wherein the receptacle (16) extends over a larger angular range than the shank (22) of the cutting insert (14), and wherein the shank (22) is held in the receptacle (16) such that the holder-side end (28) of the shan

Abstract: A parting tool for the chip removing machining of metal blanks includes a blade and a replaceable cutting insert mounted in a seat, which is delimited between a bottom support and an elastically resilient clamping finger. The cutting insert includes an upper side, in which there is included a front rake surface, as well as an application surface positioned behind the same and against which the clamping finger is pressed. In the clamping finger, a flushing channel is included to spray a cooling medium toward the rake surface. A front nose of the clamping finger facing a shoulder is formed between the rake surface and the application surface and has the purpose of protecting the nose from chips. The shoulder has two knobs mutually separated by a central notch, via which cooling medium can pass from the flushing channel toward the rake surface.

Abstract: A machine tool includes a table, a spindle head, a spindle, and an internal turning attachment. The internal turning attachment includes an attachment base, a body, and a tool holder. The tool holder has a tool mount surface to which a turning tool is detachably mounted. The tool mount surface provides a changeable tool mount angle with respect to a plane perpendicular to a spindle rotational axis in a state where the internal turning attachment is mounted to the spindle head. An angle between the spindle rotational axis and a vertical axis is to be larger than zero degree according to the changeable tool mount angle and is fixed while the turning tool contacts a workpiece in a case where the workpiece has a hole with a depth exceeding a length from a body upper portion to a tip end of the turning tool along the spindle rotational axis.

Abstract: A groove cutting tool has a groove insert and a tool holder. The groove insert can be replaced by using a lever tool. The lever tool penetrates into a slot by way of an ejector portion and is able to assume several positions in the slot either in order to contact the groove insert and to push it out of its receiving means or in order to push away a clamping jaw and to open the receiving means for the groove insert.

Abstract: A cutting tool includes a cutting insert and a tool holder. The tool holder includes: a base for supporting a bottom surface of the cutting insert; a clamping arm for pressing a top surface of the cutting insert; an insert receiving space formed between the bottom surface of the clamping arm and the base; and a supporting surface which defines an end of the insert receiving space and supports an end of the cutting insert. The cutting insert includes: a first pressing region on the front portion of the top surface which is oriented in a vertically upward direction; and a second pressing region on the rear portion of the top surface which is oriented at an angle in the front direction.

Abstract: Disclosed are stabilized aqueous polymer compositions containing A) a stabilizing amount of a least a sulfur dye or containing a stabilizing amount of a sulfur dye with a compound comprising a heterocyclic system containing nitrogen and sulphur as ring heteroatoms and B) at least one polymer comprising groups which are capable of complex formation with ions. The aqueous polymer compositions are stabilized against thermal or other degradation processes of the polymer by addition of component A) to allow their use even under harsh conditions.

Abstract: A cutting insert (130) is formed to be rotationally symmetric with respect to an axis line (C3) of a height direction and to be planarly symmetric with respect to a virtual plane of the insert (VS1), an axis line (C2) of a traverse direction is gradually inclined toward the front of a rotational direction around which a workpiece (W) rotates moving toward a first traverse direction (C2A), an axis line (C1) of a longitudinal direction extends toward a lower surface side of an insert body (131) so as to approach a virtual plane of the tool moving toward a first longitudinal direction (C1A), and one corner portion (143C) in the other cutting edge (132B) is disposed further toward a first traverse direction (C2A) than one corner portion (143A) in one cutting edge (132A).

Abstract: A cutting tool (10) includes a toolholder (12) and a cutting insert (14) removably securable in the toolholder. The cutting insert (14) includes a lower clamping surface (18) with a V-shaped clamping surface (32, 34) on each side of a central portion (28). The toolholder includes a lower clamping surface (56) with an inverted V-shaped clamping surface (62, 64) on each side of the bottom surface (60) formed by a primary clamping surface (62a, 64a) and a secondary clamping surface (62b, 64b). The secondary clamping surfaces (32b, 34b) of the cutting insert (14) contacts the secondary clamping surfaces (62b, 64b) of the toolholder (12) when the cutting tool (10) is brought into a clamped position due to interference between the toolholder (12) and the cutting insert (14), thereby providing a minimum of four clamping surfaces when in the clamped position.

Abstract: A parting tool is in the form of a blade and a replaceable cutting insert, as well as, a key having an eccentric body. The cutting insert may be clamped in a seat under an elastic, resilient clamping finger. In the blade, a keyhole is formed, into which the eccentric body can be inserted. In the keyhole, there are included concave sliding surfaces, which border on a flat stop surface. With these, convex corner surfaces and flat shoulder surfaces on the eccentric body can interact. By the unique design of the keyhole and eccentric body, a gentle interaction between the surfaces is obtained, which guarantees a long service life of the blade, as well as the key.

Abstract: A slotting cutter includes a disc-like cutter body rotatable in a predetermined direction on a central axis perpendicular to a plane of the cutter body. The cutter body includes a stop slot, an upper cam slot and a lower slot. A plurality of pockets adapted to receive a cutting inset are formed about a perimeter of the body. A cantilevered clamping member includes a bottom surface with a pair of clamping surfaces that engage a pair of angled clamping surfaces on a top surface of the cutting insert during operation. A wrench is provided to lift the cantilevered clamping member for inserting, indexing or removing the cutting insert from the slotting cutter. The wrench includes two fixed pins and a floating pin that prevents the cantilevered clamping member from bending too far and limiting the useful life of the slotting cutter.

Abstract: A cutting insert for metalworking operations is retained within a cutting insert holder by a resilient tab on the holder that engages a recess on the stem of the insert. The cutting insert and the holder may be fabricated using rapid prototyping techniques such as 3D printing.

Abstract: An indexable cutting insert has mutually perpendicular longitudinal, lateral and vertical axes. The insert includes two opposite cutting portions and a clamping portion therebetween, arranged parallel to the longitudinal axis. Each cutting portion includes a rake surface and front and side relief flanks, and a cutting edge formed at an intersection of the rake surface and front relief flank. A second width of the clamping portion is greater than the first width of the cutting edges. The clamping portion has two resilient beams and a flexibility aperture opening out to side abutment surfaces of the clamping portion, allowing elastic deformation of the insert along the vertical axis. The cutting insert may further include two opposite stopper portions, each formed on a respective insert end surfaces, each stopper portion forming a step in the respective insert end surface. A cutting tool clamps one or more inserts at their clamping portions.

Abstract: A tool holder has a main body having a holder head extending away from a holder shank in a forward direction, a clamping member non-threadingly retained in the holder head, and a locking member operatively engaging a single abutment surface of the clamping member. The holder head has an insert receiving pocket at a forward end thereof with a pocket support surface substantially facing in an upward direction, and the clamping member is located entirely rearward of the pocket support surface with the abutment surface facing generally upwardly. The tool holder is configured to direct a clamping force towards, and clamp a cutting insert against, the pocket support surface.

Abstract: A cutting tool key is suitable for mounting and extracting a cutting insert into and from an insert receiving slot of a cutting tool holder blade. The key includes an elongated protrusion having first and second engagement portions with a pivot axis formed in the first engagement portion. The insert receiving slot has a holder axis extending in a forward-to-rearward direction, and a clamping-jaw surface facing a base-jaw surface. The base jaw surface has a holder-passage opening out to the holder's side surfaces, and the insert has an insert-passage opening out to the insert's lateral surfaces. The first and second engagement portions engage the holder-passage and insert-passage, respectively, with the pivot axis in the holder-passage. Rotating the key in an extraction direction about the pivot axis applies extraction-force on the insert. Rotating the key in a mounting direction, opposite to the extraction direction, applies a mounting-force on the insert.

Abstract: A cutting tool used for grooving and turning has a cutting insert removably secured in a holder blade. The cutting insert includes an insert passage having an insert passage axis, and the holder blade includes a holder passage having holder passage axis. When the cutting insert is resiliently clamped in the holding portion and located in a rearmost position, a passage plane containing the holder and insert passage axes forms a first angle with a main plane, perpendicular to the insert longitudinal axis and containing the insert passage center point, where the first angle is less than or equal to 60°. The cutting insert can be extracted from the cutting tool by positioning first and second engagement portions of an extraction key simultaneously in the holder and insert passages, respectively, and rotating the extraction key.

Abstract: A cutting tool for grooving, parting and turning machining operations is capable of grooving to unlimited depths of cut. The cutting tool includes an indexable double-ended cutting insert having a downwardly extending insert clamping portion resiliently clamped in a self-retaining manner in an insert pocket so that chip formation is not hindered during such machining operations.

Abstract: The invention relates to a tool, in particular a revolving tool for machining, in particular metal cutting, workpieces, comprising a carrier body, a cutting body arranged detachably on the carrier body, and a clamping bracket for the positionally accurate fixation of the cutting body relative to the carrier body, wherein the cutting body is pressed against a supporting surface on the carrier body in a planar manner. According to the invention, the clamping bracket is integral with the carrier body and connected to the carrier body by way of a material joint. Furthermore, the cutting body is supported in the direction of the material joint on a face supporting surface of the clamping bracket, wherein the supporting surface is arranged on the carrier body at an acute angle (?) with respect to the face supporting surface of the clamping bracket and oriented in the direction of the material joint.

Abstract: A grooving tool for cutting grooves in workpieces and a grooving tool tool holder for permitting replacement of inserts and permitting inserts to be replaced without moving the tool holder with respect to the grooving tool in which the tool holder is installed.

Abstract: The present invention relates to a holder for a machining tool insert, in particular a lancing or cutting insert, having an approximately beam-shaped cutter holder, a cavity formed inside the end thereof, which serves as a receiving pocket for the tool insert and is bounded by clamping jaws that define the clearance width of the receiving pocket, a slot extending with a first end to within the proximity of the inner edge of the receiving pocket so as to permit elastic pivotability of one of the clamping jaws, and having a clamping arrangement comprising an actuation member for producing a clamping force that acts within the region of the slot upon the pivotable clamping jaw.

Abstract: A cutting tool used for grooving and turning operations where a cutting insert is resiliently securable in a holder blade. The cutting insert includes an insert central lower surface located between, and recessed with respect to, two insert lower component surfaces, each having an insert lower abutment surface. At least one of the two insert lower component surfaces includes an insert inner curved ramp extending from its insert lower abutment surface to the adjacent insert lower intermediate surface and at least the other of the two insert lower component surfaces includes an insert outer curved ramp extending from its insert lower abutment surface to an adjacent end surface.

Abstract: A cutting tool used for grooving and turning has a cutting insert removably secured in a holder blade. The cutting insert includes an insert passage having an insert passage axis, and the holder blade includes a holder passage having holder passage axis. When the cutting insert is resiliently clamped in the holding portion and located in a rearmost position, a passage plane containing the holder and insert passage axes forms a first angle with a main plane, perpendicular to the insert longitudinal axis and containing the insert passage centre point, where the first angle is less than or equal to 60°. The cutting insert can be extracted from the cutting tool by positioning first and second engagement portions of an extraction key simultaneously in the holder and insert passages, respectively, and rotating the extraction key.

Abstract: A metal cutting tool having an insert holder and a cutting insert releasably secured therein. The insert holder has upper and lower blocks and upper and lower jaws, each jaw projects from the front end of each respective block. The cutting tool has a cutting portion support projecting transversely from the front end of the lower clamp at an angle ?. The cutting insert has a shaft and a first cutting portion projecting transversely from the shaft at the angle ?. The cutting insert has non-planar abutment surfaces formed to mate with corresponding, non-planar support surfaces located on the lower and upper jaws and on the cutting portion support.

Abstract: A cutting tool assembly includes an exchangeable adapter releasably secured to a holder. The adapter is provided with a side plate. In a bottom view of the holder, a portion of a front surface of the holder adjacent a first side surface of the holder forms an internal acute angle ? with the first holder side surface and in a bottom view of the adapter, a rear surface of the adapter side plate forms the acute angle ? with an inner side surface of the adapter.

Abstract: A cutting tool has a cutting insert releasably retained in an insert pocket. The insert pocket includes a supporting portion having support surfaces and a clamping portion including a socket having a socket wall, the socket extending rearwardly from the supporting portion. The cutting insert has a cutting portion with front abutment surfaces and an elongated locating portion extending rearwardly from the cutting portion. The cutting insert is retained in the insert pocket with the front abutment surfaces abutting the support surfaces and with the locating portion located in the socket with abutment surfaces of the locating portion in abutment with the socket wall.

Abstract: A clamp auxiliary member is low in manufacturing costs has a simple structure, is applicable to a small-diameter tool, and facilitates replacement of a cutting insert in a cutting tool. The cutting insert is mounted to a tool body by means of the clamp auxiliary member, which is provided with an engagement portion for engaging a fastening screw. The clamp auxiliary member is formed in a ring shape and has one or more slits notching a part thereof. The clamp auxiliary member, and is flexibly deformed at the time the force is applied to an inner peripheral face upper portion thereof from the head portion of the fastening screw to expand the outer diameter. A cutting tool may be provided with such a clamp auxiliary member.

Abstract: In a tool system for machining, having at least one receptacle for a cutting insert which can be brought at least partly with a bearing surface of convex curvature into contact with a supporting surface of concave curvature on the receptacle, the convexity and concavity of bearing surface and supporting surface, respectively, which face one another, define lines of curvature which are different from one another and of which at least one deviates from the circular form.

Abstract: A cutting tool for grooving and turning operations has a removably securable cutting insert. The cutting insert is clamped in an insert holder with a longitudinally extending insert receiving slot lower surface. The insert receiving slot lower surface has two spaced apart contact sections, including a first contact section at a rear end having a V-shaped slot clamping surface with a wedge angle ?1 in clamping contact with a first V-shaped insert clamping surface of the cutting insert lower surface also with a wedge angle ?1, and a second contact section at a front end having a V-shaped slot clamping surface with a wedge angle ?2 making clamping contact with a second V-shaped insert clamping surface of the cutting insert lower surface also with a wedge angle ?2, where ?1 and ?2 are different.

Abstract: A tool holder assembly that includes a tool holder member adapted to be secured to a machine tool and a cutting insert support/clamp for clamping and supporting a cutting insert. The support/clamp member includes a plurality of serrations that are engageable with complementally formed serrations on the tool holder whereby a tight fitting engagement is achieved using removable fasteners. The support/clamp includes a clamping arm elastically movable towards and away from a support base and a clamping block connected to the connecting arm adapted to receive clamping forces from a threaded clamping bolt. The clamping bolt defines a force applying surface located in a first plane whereas the clamping block defines a force receiving surface located in a second plane, the first and second planes located at a diverging angle with respect to each other. The clamping block includes an edge portion engageable with a step on the tool holder that is spaced from the clamping arm.

Abstract: A cutting tool assembly includes a tool body and a clamping mechanism for releasably clamping a cutting insert to the tool body. The clamping mechanism includes a rotatable cam member, a coupling member, a biasing spring and a clamping element. The rotation of the rotatable cam member in opposite senses results in the adjustment of the position of the coupling member in opposite directions, which results in a displacement of the clamping element, and therefore changing the locking position to a releasing position and vice versa.

Abstract: A cutting tool for grooving, parting and turning machining operations is capable of grooving to unlimited depths of cut. The cutting tool includes an indexable double-ended cutting insert having a downwardly extending insert clamping portion resiliently clamped in a self-retaining manner in an insert pocket so that chip formation is not hindered during such machining operations.

Abstract: In an embodiment, the invention provides a tool for chip removing machining, including a replaceable cutting insert and a basic body. The basic body includes a rear fixing part, a front supporting part having an insert seat, and a tightening part spaced apart from the front supporting part by a first gap and from the rear fixing part by a second gap. The tightening part is connected to the basic body via a joint around which the tightening part is pivoted to press the cutting insert against the insert seat by a front finger. The rear fixing part includes a first channel having an inlet and an outlet for feed of a fluid toward the cutting insert. The tightening part includes an internal, second channel that extends between an inlet and an outlet.

Abstract: The present invention relates to a holder for a machining tool insert, in particular a lancing or cutting insert, having an approximately beam-shaped cutter holder, a cavity formed inside the end thereof, which serves as a receiving pocket for the tool insert and is bounded by clamping jaws that define the clearance width of the receiving pocket, a slot extending with a first end to within the proximity of the inner edge of the receiving pocket so as to permit elastic pivotability of one of the clamping jaws, and having a clamping arrangement comprising an actuation member for producing a clamping force that acts within the region of the slot upon the pivotable clamping jaw.

Abstract: A cutting tool includes an insert holder and a cutting insert releasably retained between upper and lower jaws of the insert holder. The lower jaw is provided with forward and rear projections. The forward projection has forward projection front and back abutment surfaces inclined, respectively, at first and second angles to a feed direction, the first angle being greater than the second angle. The cutting insert has a cutting portion adjacent a longitudinally extending shaft portion and a recess in a lower insert surface. The recess has front and back recess abutment surfaces inclined, respectively, at the first and second angles to a lower edge of the shaft portion. The forward projection front abutment surface abuts the front recess abutment surface, and the forward projection back abutment surface abuts the back recess abutment surface.

Abstract: A clamping mechanism for a cutting insert that clamps the cutting insert in an insert mounting seat having a pair of contacting surfaces facing each other. Contacting surfaces of the insert mounting seat are provided with a pair of inclined planes inclined so as to be formed in a convex V-shape in the cross-section along the contacting direction, and the contact surfaces of the cutting insert are formed in a concave V-shape which has a pair of convex surfaces with roundness to be concave toward the inclined planes, and the pair of inclined planes and the pair of convex surfaces come in contact with each other at a pair of contacting positions, which have an interval therebetween in the width direction orthogonal to the contacting direction.

Abstract: A metal cutting tool assembly comprising a rigid holder blade, an insert receiving slot formed in a leading end of the holder blade and defined between a resiliently displaceable clamping jaw formed integrally with the holder blade and rigid base jaw forming part of the holder blade, spaced apart displacement and supporting surfaces respectively formed in or on the clamping jaw and the holder, and a slot opening key, with a pair of spaced apart projecting prongs of the key adapted to engage the surfaces. At least one of the prongs is displaceable with respect to the holder blade so as resiliently to displace the clamping jaw outwardly with respect to the base jaw into an opening position for insertion or removal of an insert.

Abstract: A metal cutting tool assembly comprising a rigid holder blade, an insert receiving slot formed in a leading end of the holder blade and defined between a resiliently displaceable clamping jaw formed integrally with the holder blade and rigid base jaw forming part of the holder blade, spaced apart displacement and supporting surfaces respectively formed in or on the clamping jaw and the holder, and a slot opening key, a pair of spaced apart projecting prongs of the key with adapted to engage the surfaces. At least one of the prongs is displaceable with respect to the holder blade so as resiliently to displace the clamping jaw outwardly with respect to the base jaw into an opening position for insertion or removal of an insert.