Abstract: Embodiments disclosed herein are directed to bearing assemblies that include integrated lubrication, bearing apparatuses including such bearing assemblies, and related methods. For example, a lubricated bearing assembly may include a lubricant that may lubricate the bearing surface thereof during operation of the lubricated bearing assembly and/or bearing apparatus including the lubricated bearing assembly.

Abstract: A cutting bit for a bit assembly secured to a cutter head includes a cutting end, a shank extending along a bit axis, and a shoulder positioned between the cutting end and the shank. The shoulder includes an outer edge defining a perimeter, a shoulder end surface defining a shoulder plane, a first inclined surface and a second inclined surface. The first inclined surface is positioned between the outer edge and the shoulder end surface. The first inclined surface extends along the perimeter and is oriented at a first acute angle relative to the shoulder plane. The second inclined surface is positioned between the shoulder end surface and the first inclined surface. The second inclined surface is oriented at a second acute angle relative to the shoulder plane, and the second acute angle is smaller than the first acute angle.

Abstract: A quick change type bit/bit holder includes several different structures for holding the item in a bit block without the necessity of a fastener. The bit portion of the bit/bit holder combination includes a ductile steel insert with a polycrystalline diamond coated tungsten carbide bit positioned therein. The ductility of the steel insert acts as a shock absorber to allow the bit to successfully remove concrete as well as asphalt in a road milling machine.

Abstract: A pick tool for pavement degradation or mining, comprising an insert and a holder, the insert comprising a super-hard strike tip joined to a proximate end of an insertion shaft. The insertion shaft is secured by an interference fit within a bore provided in the holder, the insertion shaft having a longitudinal axis and a distal end of the insertion shaft positioned at an insertion depth within the bore. A wear limit marker is provided on an external surface of the holder and positioned to correspond to an axial distance along the insertion shaft from the distal end, the distance being at least 20 percent and at most 35 percent of the insertion depth.

Abstract: A cutting tool includes a cutting tool body having an axial forward end, an axial rearward end, a head portion adjacent the axial forward end and a shank portion adjacent the axial rearward end. The head portion includes a partial frusto-conical portion having a first lateral edge and a second lateral edge; a first side surface having a first lateral transition edge and a first terminal edge, wherein the first lateral transition edge is adjoined to the first lateral edge of the partial frusto-conical portion; and a second side surface having a second lateral transition edge and a second terminal edge, wherein the second lateral transition edge is adjoined to the second lateral edge of the partial frusto-conical portion, and wherein the first terminal edge is adjoined to the second terminal edge to form a cutting edge. The cutting tool also includes a hard cutting tip.

Abstract: A dirt and rock cutting tool includes a cutting bit mounted on a bit holder. The cutting tool is secured to a bit holder in a manner that allows infinite rotational positioning of the cutting bit but substantially prevents rotation of the cutting bit once secured to a bit holder. The bit holder includes a planar shoulder and a shank extending from the planar shoulder. Shank has a terminal end which includes a threaded bore member. The bit holder includes a receiver dimensioned for receiving the shank. At least one hardened pin member is carried by the bit holder. At least a portion of the tip of the hardened pin extends beyond the surface of the shoulder. Upon securing the bit holder to the bit block, the hardened pin is pulled into the softer metal of the bit block, substantially preventing rotation of the bit holder within the bit block.

Abstract: Mineral bits (10, 100) and associated mounts (30, 116, 200) for use during excavation and mining operations are disclosed. An exemplary bit (10) has a front region (12) and an opposite rear region (14) and comprises a head portion (16) and a mounting portion (18) secured to the head portion (16). The mounting portion (18) can be configured to be releasably retained by a mount (30). A rounded transition (22) disposed in the front region (12) of the bit between the head portion (16) and the mounting portion (18) provides a clearance (C) between the head portion (16) and the mount (16). Mineral bits (10, 100) disclosed can be inserted into and withdrawn from mounts (30, 116, 200) by linear and/or rotational movement.

Abstract: A cutting bit and bit assembly for mounting at a cutting machine. The bit includes an axially tapered bit body having a recess extending axially within the body. The recess has an innermost region and a mouth region that is generally convex and/or tapered radially outward to abut a corresponding concave or tapered surface of a projection to secure the cutting bit at a holder body. An annular step is positioned within the recess at the mouth region to prevent dust and contaminant fluid or particles from passing axially into the recess.

Abstract: A cutting bit retaining assembly for mounting a cutting bit at a cutting machine includes a holder body having a through bore to receive a bit shaft. A retainer acts against the holder body and bit shaft and includes a first and second abutment member that provides a reliable and constant locking force between the body and the shaft.

Abstract: A non-rotatable cutter bit for mining and construction operations having a central longitudinal axis extending therethrough includes an insert at one end. The insert has a central longitudinal axis and the apex is offset from the central longitudinal axis to provide an elongated rake face. With the insert mounted within the cutter body, the central longitudinal axis of the cutter body intersects with the apex such that the cutter body may be easily exchanged with conventional cutter bodies. The insert may also be mounted directly to the body without using an insert holder. The insert also has applications in oil and gas drilling operations.

Abstract: An improved bit holder includes a larger bit shank bore and an enlarged upper shank segment or band with a taper of up to 7 degrees per side that provides an interference fit between the top of the shank and top of the bit block bore when the bottom of the bit holder body seats on the top of the bit block bore. An annular tapered void adjacent the bit holder tire portion provides for ease of bit holder extraction.

Abstract: A cutter tool that includes a shank by which the tool is releasably retainable within a tool holder, an enlarged shoulder or heel provided at one end of the shank and adapted, in use, to abut a seating surface of a tool holder and limit the penetration of the tool holder into a receiving aperture of the tool holder, and an integral blade provided beyond the enlarged shoulder or heel and terminating in a carbide or other tip. The tool is provided with a zone of weakness such that if subjected to fracture forces, a fracture will be encouraged to propagate from the zone of weakness in a particular desired manner.

Abstract: A cutting tool mounting assembly adapted for attachment to a surface of a rotatable driving member of a cutting tool machine, includes: a tool holder having a key shank; a base attached to the surface of the rotatable driving member, the base having a mounting groove for receiving the key shank of the tool holder; a resilient retention structure configured to interact with the base and the tool holder to facilitate a friction fit between the tool holder and the base; and wherein tool holder includes a retention post configured for cooperating with the base for connecting the tool holder to the base. Also included is a dampening element configured between the tool holder and the base for reducing vibration therebetween.

Abstract: An improved pick and pick holder assembly for use in mineral winning and the like. The improved pick and pick holder increases the effective life of a tool and pick holder by minimizing the shifting of the pick within the pick holder. The movement of the pick is minimized by front and rear bearing surfaces that remain positively engaged with front and rear bearing surfaces of the pick holder for loads applied to the pick that are predominantly inward and predominantly rearward.

Abstract: A tool holder is disclosed for use with a milling drum. The tool holder may have a generally cylindrical body defining a first end configured to be received within a tool mounting block of the milling drum, and a second end configured to receive a cutting bit. The tool holder may also have a flange located between the first end and the second end, and a first blind bore initiating at the second end and stopping at the flange such that the generally cylindrical body is substantially solid at the flange. The tool holder may further have at least one sloped surface located at a side of the flange facing the first end of the generally cylindrical body.

Abstract: Embodiments disclosed herein are directed to a system for removing road material. In an embodiment, the system may include a milling drum and at least one pick mounted on the milling drum. The pick may include polycrystalline diamond at least partially forming one or more working surfaces of the pick.

Abstract: A cutting element assembly includes a cutting element partially disposed within a support and a retention mechanism disposed between the cutting element and the support, both the axial and radial dimensions of the retention mechanism being deformable.

Abstract: A cutting tool, a mounting bracket for the cutting tool, and a rotatable cutting head are provided. The cutting tool includes a saddle portion configured to be secured to a mounting bracket, an aperture extending through the saddle portion, and at least one cutting bit attachment portion. The mounting bracket includes a base having a receiving slot configured to receive a cutting tool, a threaded recess extending at least partially through the base, and a curved bottom surface corresponding to a curvature of a cutting drum. The rotatable cutting head comprises a drive shaft connectable to a drive motor, a drum portion coupled to the drive shaft, the drum portion having a curved outer surface, a plurality of mounting brackets secured to the curved outer surface, and at least one cutting tool having at least one cutting bit attachment portion removably secured to at least one of the mounting brackets.

Abstract: A degradation assembly may comprise at least one sensor mounted on a pick; the pick comprising a first conductor in communication with the sensor. The assembly may also comprise a receiving element including a bore comprising a second conductor. The first and second conductors may combine to create a connection as the pick is inserted into the bore of the receiving element.

Abstract: A flat cutter bit for engaging an earth strata material includes a non-rotatable shank portion, a head portion integrally formed with the non-rotatable shank portion and including a tip region distal from the non-rotatable shank portion, and a cutting insert mounted at the tip region of the head portion. The cutting insert includes a body having an angled leading face, a top surface having a relief surface, a T-land surface extending between the angled leading face and the relief surface of the top surface and a cutting edge formed at the intersection of the T-land surface and the relief surface of the top surface.

Abstract: The invention relates to a bit holder having an insertion projection and having a holding projection having a bit receptacle, the insertion projection comprising a bearing segment and the holding projection comprising a supporting segment. In order to allow the bit holder to be braced in permanent and stable fashion with respect to a base part, provision is made according to the present invention that the supporting segment and/or the bearing segment comprise two supporting surfaces and bearing surfaces, respectively, arranged at an angle to one another; and that the longitudinal center axis of the bit receptacle and the longitudinal axis of the insertion projection enclose an obtuse angle.

Abstract: In an embodiment, a disc cutter for use on a tunnel boring machine may include a shaft and a cutter assembly rotatably mounted on the shaft. The cutter assembly may include a cutter ring extending circumferentially about a central axis and one or more bearing apparatuses rotatably mounting the cutter assembly to the shaft. Each bearing apparatuses may include a rotor extending circumferentially about the central axis and a first plurality of superhard bearing elements distributed circumferentially about the central axis. Each first superhard bearing element may be attached to the rotor and may include a bearing surface. The bearing apparatuses may further include a stator extending circumferentially about the central axis and a second plurality of superhard bearing elements attached to the stator that are generally opposed to the first plurality of superhard bearing elements of the rotor.

Abstract: The present invention relates to a milling drum for a ground milling machine, wherein a material guiding device is provided, which diverts the milled material in the direction of stagger of milling devices disposed one behind the other, as regarded in the direction of rotation. For this purpose, in particular, a wear plate is provided, which can be selectively replaced on the material guiding device. A further aspect of the present invention relates to such a material guiding device and also to a wear plate for such a material guiding device.

Abstract: Apparatus, methods, and other embodiments associated with a mining and demolition tool are described herein. In an embodiment, a mining bit tool includes a mining and demolition bit tool base and a mining bit tool tip coupled to the mining bit tool base. The base includes a tapered portion and a stem. The tapered portion includes a first end and a second end, with a surface tapering from the first end to the second end. There are at least two flutes positioned along the tapered surface, where a first flute is positioned at an angle relative to a longitudinal axis passing through the center of the mining bit tool and a second flute is positioned to cross a path of the first flute. The stem extends from the first end of the tapered portion, and the tip is coupled to the second end of the tapered portion.

Abstract: A rotary cutter drum for a continuous mining machine having a cutter drum, a bearing hub, an inner bearing, a sealing assembly and a shaft disposed in an inner portion of the cutter drum, the shaft having at least one flat passageway disposed along a longitudinal axis of the hub for allowing a lubricating fluid to move from an oil reservoir to a bearing surface.

Abstract: The invention relates to a bit holder for an earth working machine, in particular a road milling machine, that comprises a bit receptacle in the region of a working side of a support member and that indirectly or directly carries an insertion projection on an insertion projection side of the support member, the support member comprising two stripping surfaces [first or second stripping surfaces] that form a stripping surface pair and are at an angle to one another. In order to achieve a stable and long-lived configuration with such a bit holder, provision is made according to the present invention that the support member comprises at least one further stripping surface that is at an angle to the two stripping surfaces of the stripping surface pair.

Abstract: A profile of a cutting tip includes a convex portion extending from a cutting end to an inflection point located at an axial and radial distance from the cutting end. A concave portion extends from the inflection point to a point at a greater radial and axial distance from the cutting end. The profiles of the generally concave portion and the generally convex portion have a first linear portion defined by a portion of a first line extending from a first point at a first radial position to a second point at a second radial position and axially spaced from the first point. A second linear portion is defined by a portion of a second line extending from a third point to a fourth point at the second radial position and at an axial distance from the second point corresponding to about half a length of the first line.

Abstract: A quick change type bit/bit holder includes several different structures for holding the item in a bit block without the necessity of a fastener. The bit portion of the bit/bit holder combination includes a ductile steel insert with a polycrystalline diamond coated tungsten carbide bit positioned therein. The ductility of the steel insert acts as a shock absorber to allow the bit to successfully remove concrete as well as asphalt in a road milling machine.

Abstract: A tip for a degradation tool, the tip comprising a PCD structure (20) joined to a cemented carbide substrate (30); the PCD structure comprising a plurality of strata (24, 25) arranged so that adjacent strata have alternating compressive and tensile stress states, adjacent strata comprising different PCD grades and being directly bonded to each other by inter-growth of diamond grains; each stratum having a mean thickness of at most 500 microns; the PCD structure defining a working end including a rounded conical apex (22) having a radius of curvature of 1.3 mm to 4 mm.

Abstract: A cutter head includes a first member, a cutting bit, and a second member. The first member includes a first end and a second end and includes a first mass. The cutting bit is coupled to the first member proximate the second end. The cutting bit includes a cutting edge rotatable about the axis. The second member is rotatable about the axis and includes a second mass eccentrically positioned with respect to the axis. Rotation of the second mass causes the first member and the cutting bit to oscillate.

Abstract: In one aspect of the present invention, a pick assembly is configured to reduce aggregate drag that is formed during a degradation process. The pick assembly is configured to redirect the flow of the aggregate to conserve energy and maintain efficiency during the degradation process.

Abstract: A pick tool for degrading asphalt or rock, comprising a PCD element; the PCD element comprising a PCD structure (20) bonded to a cemented carbide support body (30) at an interface; the PCD structure comprising a first region (24) and a second region (25) adjacent the first region, the second region bonded to the first region by intergrowth of diamond grains; the first region (24) comprising a plurality of alternating strata (24c, 24t), each stratum having a thickness in the range of about 30 to 300 microns; the second region comprising a plurality of strata (25a, 25b), one or more strata in the second region (25a) having a thickness greater than the thicknesses of the individual strata in the first region (24c, 24t), wherein the alternating strata in the first region (24) comprise first strata alternating with second strata, the first strata being in a state of residual compressive stress and the second strata being in a state of residual tensile stress.

Abstract: A tool mounting block is disclosed for use with a milling drum. The tool mounting block may have a flighting portion with a base surface configured to engage an outer cylindrical surface of the milling drum, and a mounting portion integrally formed with the flighting portion at a location opposite the base surface. The mounting portion may be configured to receive a separate tool holder. The tool mounting block may further have at least one locating feature integrally formed with the flighting and mounting portions. The at least one locating feature may be configured to interlock with at least one locating feature of an adjacent tool mounting block.

Abstract: A tool holder is disclosed for use with a milling drum. The tool holder may have a generally cylindrical body defining a first end configured to be received within a tool mounting block of the milling drum, and a second end configured to receive a cutting bit. The tool holder may also have a flange located between the first end and the second end, and a first blind bore initiating at the second end and stopping at the flange such that the generally cylindrical body is substantially solid at the flange. The tool holder may further have at least one sloped surface located at a side of the flange facing the first end of the generally cylindrical body.

Abstract: A pick assembly (100) comprising a pick tool (200), a pick holder (300) and a rotatable drive means (400); in which the pick holder is attached to the rotatable drive means and the pick tool comprises a base (220) and a strike element (210) capable of being attached to the base, the strike element comprising a strike tip (212) defining a strike tip axis (213) and the base capable of being attached to the pick holder; the pick holder and pick tool being configured in relation to the drive means operative to the strike tip axis being oriented to within a strike angle of at most 5 degrees with a strike plane on which the strike tip will travel when driven by the drive means.

Abstract: The invention relates to a bit holder having an insertion projection and having a bore-shaped bit receptacle that has a longitudinal center axis, a convexly curved support surface being provided on a base part. A bit holder of this kind can be implemented in compact and stable fashion in particular by the fact that the longitudinal center axis of the bit receptacle intersects the support surface.

Abstract: A degradation assembly may comprise at least one sensor mounted on a pick; the pick comprising a first conductor in communication with the sensor. The assembly may also comprise a receiving element including a bore comprising a second conductor. The first and second conductors may combine to create a connection as the pick is inserted into the bore of the receiving element.

Abstract: A ripper tool for a tunnel boring machine includes a tool body and a plurality of cutting element inserts. The tool body has a plurality of socket cavities. A tool body blank can be heat treated to increase the hardness of the tool body blank. The socket cavities can be machined in the tool body blank after the tool body blank is heat treated. The cutting element inserts are mounted to the tool body. The cutting element inserts are respectively press fit in the socket cavities. The ripper tool can be pivotably mounted to a cutter head of the TBM.

Abstract: The invention relates to a bit holder for an earth working machine, in particular a road milling machine, having a support member onto which an insertion projection is indirectly or directly attached on an insertion projection side, the support member comprising two first and/or two second stripping surfaces that are at an angle to one another, and the support member having a working side that comprises a bit receptacle. In order to achieve a stable and long-lived configuration for such a bit holder, provision is made according to the present invention that the first and/or second stripping surfaces diverge from the insertion projection side toward the working side.

Abstract: A chisel holder comprises a body zone (12) having a chisel receiving opening (18) that is open at least in the direction of a chisel insertion end (14) of the body zone (12), and also comprises a fastening shaft (26) which extends from a supporting end (20) of the body zone (12) and has a longitudinal shaft axis (LB), the body zone (12) having a first supporting surface region (22) at its supporting end (20). Said chisel holder is characterized in that the body zone (12) has a second supporting surface region (24) at its supporting end (20), said second surface region (24) extending at an angle from the first supporting surface region (22), or/and the first supporting surface region (22) comprises a first supporting surface (28) and a second supporting surface (30) extending at an angle from the first supporting surface (28).

Abstract: A chisel holder comprises a body zone (12) having a chisel receiving opening (18) that is open at least in the direction of a chisel insertion end (14) of the body zone (12), and also comprises a fastening shaft (26) which extends from a supporting end (20) of the body zone (12) and has a longitudinal shaft axis. A fastening member-affecting zone is provided on a first side of the fastening shaft (26), and a supporting zone (78) that has supporting surface regions (88, 90) which are inclined relative to each other and adjoin each other in a transition zone (92) extending in the direction of the longitudinal shaft axis is provided on a second side of the fastening shaft (26), said second side lying opposite the first side relative to the longitudinal shaft axis.

Abstract: A core breaker positioned between cutting drums on a mining machine that includes a generally circular support member, and a beveled blade portion on the radial outward surface of the support member. The beveled blade portion includes a plurality of wedge-shaped portions and a plurality of serrated portions. Each wedge-shaped portion is connected to an adjacent wedge-shaped portion through a mediate serrated portion. Both the wedge-shaped portions and the serrated portions are generally beveled. The wedge-shaped portions and serrated portions maintain curvatures, giving the blade portion a generally undulated appearance. The blade portion has two faces, and can be beveled on a single face. Alternatively, the blade portion can be beveled on each face. The beveled surfaces can be substantially symmetrical or asymmetrical from a view in the radial direction of the generally circular support member.

Abstract: A cutting tool holding device includes a base, a cutting tool holder and a fastening member. The base includes an abutting portion and a transverse dovetail groove, wherein the abutting portion is defined between a first wall with a mounting surface and a second wall, and the transverse dovetail groove is formed on the mounting surface. The cutting tool holder has a transverse dovetail portion, wherein the cutting tool holder is abutted against the abutting portion, and the transverse dovetail portion is detachably engaged into the transverse dovetail groove on the mounting surface of the second wall. The fastening member is for fastening the cutting tool holder to the base.

Abstract: Tool bit for non-rotatable mounting in a bore of a holder has a cutting head, a shoulder and a shank arranged axially along an axis of the tool bit. A groove is disposed circumferentially about a portion of the shank, and a compression band seated therein. Two or more grooves on the shank can include a non-metallic compression band and an optional o-ring. The compression bands/o-ring protrude past the outermost surface of the shank and, when the tool bit is positioned in a bore of a holder or sleeve, cause an outermost surface of the shank to be in non-contact with an inner diameter surface of the mounting bore and seal the space between the shank and the inner diameter surface of the bore to help prevent moisture and dust encountered during operation from getting between the tool and the holder.

Abstract: A replaceable arbor tool holder for replaceable impact tools provides a base structurally carrying a tool holder for a replaceable impact tool. The base is arcuate and the tool holder is structurally interconnected to a top surface of the base. A medial channel is defined in the tool holder to releasably carry an impact tool. The tool holder converts impact forces upon the impact tool into frictional forces along a line tangent to the circumference of the arbor when the tool holder is fastened to the rotating arbor.

Abstract: A tool system for a mining machine. The tool comprises a tool holder (12) and a cutting tool pick (14) with a cutting tip (16). The mounting end of the tool comprises a tapered shank (18) in a corresponding tapered socket (20) of the tool holder (12). There may be a wear plate (24) situated between the tool holder (12) and the tool (14). There may be further removable wear plates (30) positioned between the tool holder and the tool in the shank region, these wear plates may have lateral projections (29) engaging corresponding recesses (32) in the shank region of the body (12). All these wear plates may be sacrificial and are able to be replaced upon wear, thus less damage will occur to the shank region of the tool or the holder body. The tool assembly may further include a pin (42) which can engage both the tool and holder by extending through aligned openings, opening (40) in the tool holder and opening (38) in the tool. The pin may be resiliently held in place.

Abstract: The present invention relates to a milling rotor for processing ground material, comprising a plurality of milling tools which are arranged in a distributed manner over the jacket surface spaced at predetermined distances and according to a predetermined pattern. In order to improve the distribution of the milling material, the milling tools are arranged in the circumferential direction of the milling rotor along parallel imaginary lines which are composed of at least one respective, equally long section of a left-hand and a right-hand helical line.

Abstract: An assembly for mounting a cutter bit on a driven mechanism, the assembly comprising a bit holder including a holding portion adapted to receive the bit and a mounting base rear portion. The bit holder holding portion is a forward portion, the forward portion being separate from but connected to the mounting base rear portion.

Abstract: A composite sintered powder metal article including a first region including a cemented hard particle material such as, for example, cemented carbide. The article includes a second region including: a metallic material selected from a steel, nickel, a nickel alloy, titanium, a titanium alloy, molybdenum, a molybdenum alloy, cobalt, a cobalt alloy, tungsten, a tungsten alloy; and from 0 up to 30 percent by volume of hard particles. The first region is metallurgically bonded to the second region, and each of the first region and the second region has a thickness of greater than 100 microns. The second region comprises at least one mechanical attachment feature so that the composite sintered powder metal article can be attached to another article. The article comprises one of an earth boring article, a metalcutting tool, a metalforming tool, a woodworking tool, and a wear article.

Abstract: An improved bit assembly for road milling, mining, and trenching equipment includes a streamlined tip assembly that is a combination of conical and cylindrical in shape and devoid of protrusions or annular indentations that might impede the flow of removed material over and around the bit assembly or provide space for removed material to become clogged or imbedded on the tip assembly. The generally cylindrical hollow shank that mounts the bit holder to the bit block includes at least one axially aligned slot along its side wall that allows the side wall to supply radial force to maintain the bit holder in the bit block.