Abstract: A retainer for a tool comprises an annular body, a plurality of protruding bosses, and a slot formed through the body in an axial direction. The annular body defines a central opening adapted to receive a tool therein in the axial direction and includes a first end having a first external diameter, and a second end having a second external diameter. The plurality of protruding bosses extend into the opening from an internal side of the body defining the central opening. In a resting state of the body, the first external diameter and the second external diameter are distinct from one another. The body is elastically deformable into a compressed state wherein the first external diameter and the second external diameter are equal.

Abstract: A system and method for monitoring and predicting wear of a cutting tool used for machining a workpiece is disclosed. The system includes a cutting tool having a shank and a cutting head. The system also includes a split, modular and wireless wear detection system including one or more sensors mounted to the cutting tool for providing a data signal representative of a physical condition of the system, and a data recording and data transmitting device for recording the data signal from the one or more sensors and for generating and transmitting a data signal to a processor. The processor applies a machine learning data processing technique in real time to monitor and/or predict a condition of various components and/or parameters of the system during a metal cutting operation.

Abstract: An impeller assembly comprises a main body adapted to be operatively coupled to a material processing machine, a tip removably attached to the main body, and a fastening assembly. The fastening assembly includes a first mounting element moveably arranged within one of the main body or the tip along a first axis, a second mounting element fixed to the other one of the main body or the tip, and a fastener. The fastener is adapted to bias the first mounting element along the first axis between a first position in which the second mounting element is slidably engageable with the first mounting element, and a second position wherein the tip is fixedly secured to the main body.

Abstract: An element or impeller includes a main body adapted to be operatively connected to a material processing machine, and a tip removably attached to the main body. The main body includes a first mounting element defining at least one of a protruding boss or a recess formed on a mounting end of the main body, and a through-hole extending through the main body. The through-hole is adapted to receive a fastening means therein. The tip includes a second mounting element defining at least one of a protruding boss or a recess complementary to the first mounting element. The second mounting element is formed on a mounting side of the tip, and is adapted to directly or indirectly engage with the first mounting element. The tip defines a bore extending therein. The bore and the through-hole are aligned (e.g., coaxially) when the tip is attached to the main body.

Abstract: An indexable earth cutting tool system includes an indexable earth cutting tool assembly and a support block. The earth cutting tool assembly includes a cutting tool, such as a conical cutting bit, and a sleeve having a bore for receiving a shank of the conical cutting bit. The conical cutting bit can be a rotatable conical cutting bit or a static conical cutting bit. In one aspect, the sleeve is a dual indexable sleeve with the bore having a cylindrical portion and a non-cylindrical portion that accepts both the rotatable conical cutting bit and the static (i.e., non-rotatable) conical cutting bit. In another aspect, the sleeve is a static indexable sleeve with the bore having only a non-cylindrical cross section that only accepts the static conical cutting bit.

Abstract: A rotary cutting tool includes a tool body including a shank portion and a cutting portion adjoining the shank portion. The cutting portion has a plurality of blades separated by helically twisted flutes. A tunable vibration absorber is disposed within an internal cavity formed in the cutting portion and has a shape that follows the helically twisted flutes. The tunable vibration absorber includes an absorber mass and a resilient material disposed between the absorber mass and an outer wall of the internal cavity. In one aspect, the tunable vibration absorber is tuned to a desired frequency by selecting the mechanical properties of the absorber mass and the resilient material. In another aspect, the tunable vibration absorber is tuned by controlling a pressure of fluid within a main internal fluid cavity disposed within the tunable vibration absorber.

Abstract: A rotary cutting tool includes a shank portion and a cutting portion extending from the shank portion to a cutting tip. The cutting portion has a plurality of blades separated by flutes. Each of the blades includes a relief surface and a radial cutting edge formed at an intersection between a respective flute and the relief surface. The relief surface includes an inner eccentric relief immediately adjacent the radial cutting edge and an outer eccentric relief immediately adjacent the inner eccentric relief. The inner eccentric relief is formed with an inner eccentric relief angle, ?, of less than about 5 degrees, and wherein the outer eccentric relief is formed with an outer eccentric relief angle, ?, of between about 5 degrees and about 15 degrees. A method of making the rotary cutting tool is also described.

Abstract: Toolholders that have a movable coolant pipe are described. An example toolholder has a tool body and a coolant pipe. The tool body is rotatable around a central axis and has a coolant channel, a tool body passageway, and a chamber. The chamber extends from the tool body passageway toward the coolant channel. The coolant pipe is disposed within the chamber and has a coolant pipe first end, a coolant pipe second end, and a coolant pipe portion. The coolant pipe portion extends from the coolant pipe second end toward the coolant pipe first end. The coolant pipe is movable between a resting position and a deflected position. In the resting position, the coolant pipe portion is disposed a first distance from the central axis. In the deflected position, the coolant pipe portion is disposed a second distance from the central axis that is different than the first distance.

Abstract: A rotatable cutting tool includes a cutting tool body with a head portion. A bolster is at least partially received in the head portion and includes a socket, a collar portion and a shank portion. The socket is formed with a conical side wall and a radius blend. A hard tip or cutting insert is at least partially received in the socket and includes a conical head portion, a collar portion and an axially rearward frustoconical portion that generally conforms to the geometry of the socket of the bolster. The shank portion of the bolster provides a narrow bottom style geometry and the axially rearward frustoconical portion of the cutting insert provides a tapered geometry that together increases the strength of a braze joint between the bolster and the base portion, thereby reducing forces and stresses transmitted to the cutting tool during a machining operation.

Abstract: A hydraulic chuck assembly includes a tool support member having an axial bore. An expansion sleeve is received within the axial bore of the tool support member. The expansion sleeve comprises an inner surface, an outer surface and a front flange extending radially outward from the outer surface. A primary pressure chamber is formed between the axial bore of the tool support member and the outer surface of the expansion sleeve. A flexibility of the expansion sleeve is increased by removing material from the expansion sleeve in a vicinity of a front braze ring and a rear braze ring, thereby decreasing a maximum stress in the front braze ring and the rear braze ring. The material is removed by undercuts that form secondary pressure chambers in fluid communication with the primary pressure chamber.

Abstract: A cutting tool includes a base body and a cutting head at least partially disposed within a modular pocket of the base body. The modular pocket is formed by at least one wall section removably attached to the base body. In one variation, a non-removable portion of the base body also forms part of the modular pocket. In another variation, the modular pocket is formed by two removable wall sections on opposite sides of the modular pocket. In yet another variation, the removable wall sections include a clamping portion to exert a downward force on the cutting head to enable mounting the cutting head in the modular pocket using an interference fit.

Abstract: A double-sided, indexable cutting insert for a milling cutter includes a first surface, a second surface, and side surfaces. Cutting edges are defined at an intersection between the first and second surfaces and side surfaces. Each cutting edge includes a first cutting-edge portion, a second cutting-edge portion and a third cutting-edge portion. The first and second surfaces include diagonally opposite recessed regions. The cutting insert is mounted in a milling cutter defining a radial rake angle, A, and a ramping angle, B, with respect to a central, rotational axis of the milling cutter that provide superior performance for both milling and ramping cutting operations.

Abstract: A clamping assembly includes a base member having an internal bore, a lock rod within the internal bore of the base member and moveable between an unlocked position and a locked position, the lock rod including a lock rod cam surface and a first bearing, a crank wheel having an axis of rotation and a third bearing, and a linkage including a second bearing comprising an elongated cavity formed in an outer surface, a fourth bearing and a cam surface at one end thereof.

Abstract: An indexable earth cutting tool system includes an indexable earth cutting tool assembly and a support block. The earth cutting tool assembly includes a cutting tool, such as a conical cutting bit, and a sleeve having a bore for receiving a shank of the conical cutting bit. The conical cutting bit can be a rotatable conical cutting bit or a static conical cutting bit. In one aspect, the sleeve is a dual indexable sleeve with the bore having a cylindrical portion and a non-cylindrical portion that accepts both the rotatable conical cutting bit and the static (i.e., non-rotatable) conical cutting bit. In another aspect, the sleeve is a static indexable sleeve with the bore having only a non-cylindrical cross section that only accepts the static conical cutting bit.

Abstract: A tool retainer is provided. The tool has a retainer sleeve having a longitudinal external tab to engage with an internal recessed radial groove with a tool holder, and wherein the retainer sleeve has one or more internal radial tabs that engage with a recessed groove in a rotating tool shank. A cutting tool assembly including a cutting bit and the retainer sleeve is provided.

Abstract: A system and method for monitoring and predicting wear of a cutting tool used for machining a workpiece is disclosed. The system includes a cutting tool having a shank and a cutting head. The system also includes a split, modular and wireless wear detection system including one or more sensors mounted to the cutting tool for providing a data signal representative of a physical condition of the system, and a data recording and data transmitting device for recording the data signal from the one or more sensors and for generating and transmitting a data signal to a processor. The processor applies a machine learning data processing technique in real time to monitor and/or predict a condition of various components and/or parameters of the system during a metal cutting operation.

Abstract: Cutting tool for the rotary machining of workpieces, in particular a twist drill, with a cutting tip which has at least one main cutting edge and at least one free surface, wherein a flank face adjoins the main cutting edge radially to the outside, and wherein a flank angle of the flank face increases in a radially outward direction.

Abstract: A cutter tooth assembly includes a cutter tooth having a shank portion and a cutting portion, and a cutter tooth holder having a pocket for receiving at least a portion of the shank portion of the cutter tooth. The shank portion of the cutter tooth has a plurality of tapered surfaces formed at a first angle with respect to a vertical axis of the cutter tooth, and the pocket of the cutter tooth holder has a plurality of tapered surfaces formed at a second angle with respect to a vertical axis of the cutter tooth holder that cooperate with the plurality of tapered surfaces of the shank portion of the cutter tooth to minimize tolerances between the shank portion of the cutter tooth and the pocket of the cutter tooth holder during wear of the cutter tooth assembly.

Abstract: A rotary cutting tool with enhanced bump-off capability is disclosed. The cutting tool includes a tool shank having a pocket. A replaceable cutting head is at least partially disposed within the pocket of the tool shank with an interference fit. A coupling pin assembly is at least partially received within a bore of the tool shank. The coupling pin assembly comprises a sleeve member and a coupling pin at least partially disposed within the sleeve member. The sleeve member includes an upper portion and a lower portion having a non-circular cross-sectional shape with a bump-off surface. An actuation screw contacts the coupling pin assembly and causes the replaceable cutting head to move relative to the tool shank. The bump-off surface of the lower portion of the sleeve member extends radially outward with respect to the coupling pin by a distance, D, thereby providing enhanced bump-off capability.

Abstract: A tool retainer is provided. The tool has a retainer sleeve having a longitudinal external tab to engage with an internal recessed radial groove with a tool holder, and wherein the retainer sleeve has one or more internal radial tabs that engage with a recessed groove in a rotating tool shank. A cutting tool assembly including a cutting bit and the retainer sleeve is provided.