Abstract: A road milling drum assembly that is for use with a road milling machine. The road milling drum includes a core portion carrying a first road planing bit assembly wherein the core portion detachably connects to the road milling machine. The first road planing bit assembly has a first milling width. The assembly further including one of the following components selected from the group of: (1) a protective cover that detachably connects to the core portion and the road milling machine; or (2) a milling extension segment carrying a second road planing bit assembly wherein the milling extension segment detachably connects to the core portion and the road milling machine. The second road planing bit assembly has a second milling width wherein the road milling drum has a milling width equal to the sum of the first milling width and the second milling width.

Abstract: A cutting tool assembly mounted on a rotating drum and having a base block, a wear sleeve and a cutting bit wherein a seal is located between the base block and wear sleeve is disclosed. A fluid passage spans from the rotating drum to a discharge location between the wear sleeve and the shank of the cutting bit. The fluid lubricates the shank of the cutting bit and bore of the wear sleeve allowing the cutting bit to rotate freely within the wear sleeve. Rotation of the cutting bit promotes even wear and long life of the bit.

Abstract: A cutting tool assembly mounted on a rotating drum and having a base block, a wear sleeve and a cutting bit wherein a seal is located between the base block and wear sleeve is disclosed. A fluid passage spans from the rotating drum to a discharge location between the wear sleeve and the shank of the cutting bit. The fluid lubricates the shank of the cutting bit and bore of the wear sleeve allowing the cutting bit to rotate freely within the wear sleeve. Rotation of the cutting bit promotes even wear and long life of the bit.

Abstract: A pedestal assembly for an asphalt cutter and/or a longwall shearer includes a cutting bit detachably secured in a tool body mounted within a block with the block fixedly secured to a pedestal. The first end of the pedestal has a recess to overlap the second end of an adjacent pedestal when the pedestals are mounted on the outer surface of a drum of the cutter. The first end of the pedestal further includes a lateral flat surface portion for deflecting material made loose by the cutting bit.

Abstract: A road milling drum assembly that is for use with a road milling machine. The road milling drum includes a core portion carrying a first road planing bit assembly wherein the core portion detachably connects to the road milling machine. The first road planing bit assembly has a first milling width. The assembly further including one of the following components selected from the group of: (1) a protective cover that detachably connects to the core portion and the road milling machine; or (2) a milling extension segment carrying a second road planing bit assembly wherein the milling extension segment detachably connects to the core portion and the road milling machine. The second road planing bit assembly has a second milling width wherein the road milling drum has a milling width equal to the sum of the first milling width and the second milling width.

Abstract: An edge cutter bit assembly for use in conjunction with a rotatable drum having an edge. The edge cutter bit assembly includes a holder that includes a plurality of bores wherein each bores carries a chisel cutter bit so that the chisel cutter bit is non-rotatable. The holder is oriented with respect to the drum so that at least a portion of each one of the cutter bits extends past the edge of the drum.

Abstract: A pedestal assembly for an asphalt cutter and/or a longwall shearer includes a cutting bit detachably secured in a tool body mounted within a block with the block fixedly secured to a pedestal. The first end of the pedestal has a recess to overlap the second end of an adjacent pedestal when the pedestals are mounted on the outer surface of a drum of the cutter. The first end of the pedestal further includes a lateral flat surface portion for deflecting material made loose by the cutting bit.

Abstract: An edge cutter bit assembly for use in conjunction with a rotatable drum having an edge. The edge cutter bit assembly includes a holder that includes a plurality of bores wherein each bores carries a chisel cutter bit so that the chisel cutter bit is non-rotatable. The holder is oriented with respect to the drum so that at least a portion of each one of the cutter bits extends past the edge of the drum.

Abstract: A rotatable cutting bit, and rotatable cutting bit—bit holder assembly and washer that have increased wear resistance characteristics. The assembly incorporates a new holding washer design that has improved rotational characteristics between the cutter bit and top surface of the washer during operation. The washer includes a front face and a generally flat rear face, said front face has a plurality of ridges, said ridges each have a top face forming a bearing surface for the cutting bit to enhance rotation of the cutter bit and the flat rear face reduces rotation of said washer. The relative rotation between the rear face of the washer and front of the block face is reduced in the present invention. The improved wear resistance properties of the invention reduce the amount of necessary maintenance of rotary drums in the field resulting in reduce downtime and increase productivity. The washer is also simple to manufacture in a cost effective manner and easy to assemble in the field.

Abstract: A cutting tool assembly having a holder block mounting scheme which effectively and accurately positions the cutting tip point at its designed angle of attack. The connection assembly limits undesirable shifting during attachment of the holder block to a cutting drum. The holder block connection assembly of the present invention includes a separate mounting plate that is positioned between the bit holder block and drum/pedestal for accurately aligning the bit holder block onto to the drum/pedestal. Once the bit holder block is aligned into position by the plate as designed the bit holder block is welded to the drum/pedestal.

Abstract: A cutting tool assembly having a holder block mounting scheme which effectively and accurately positions the cutting tip point at its designed angle of attack. The connection assembly limits undesirable shifting during attachment of the holder block to a cutting drum. The holder block connection assembly of the present invention includes a separate mounting plate that is positioned between the bit holder block and drum/pedestal for accurately aligning the bit holder block onto to the drum/pedestal. Once the bit holder block is aligned into position by the plate as designed the bit holder block is welded to the drum/pedestal.

Abstract: A rotatable cutting bit, and rotatable cutting bit-bit holder assembly and washer that have increased wear resistance characteristics. The assembly incorporates a new holding washer design that has improved rotational characteristics between the cutter bit and top surface of the washer during operation. The washer includes a front face and a generally flat rear face, said front face has a plurality of ridges, said ridges each have a top face forming a bearing surface for the cutting bit to enhance rotation of the cutter bit and the flat rear face reduces rotation of said washer. The relative rotation between the rear face of the washer and front of the block face is reduced in the present invention. The improved wear resistance properties of the invention reduce the amount of necessary maintenance of rotary drums in the field resulting in reduce downtime and increase productivity. The washer is also simple to manufacture in a cost effective manner and easy to assemble in the field.

Abstract: A retainer, adapted to engage a recess in a cutting tool for securing the cutting tool to a support block, includes a retainer body having a main portion with first and second ends. The main portion defines a continuous shear zone having first and second ends. The retainer body further includes a protruding portion disposed between the ends of the continuous shear zone and spaced away from the ends of the main portion. The protruding portion extends radially from the main portion and is adapted to overlap the support block when the retainer is engaging the recess.

Abstract: A retainer clip adapted to engage a recess in a shank of a cutting tool for securing the cutting tool to a support block. The retainer clip includes a clip body having first and second end portions and at least three protruding portions disposed between the end portions. The protruding portions are adapted to extend beyond the shank when the retainer clip is engaging the recess.

Abstract: A multi-portion carbide cutting insert which affixes to the forward end of a rotatable cutting bit. The cutting insert has an axially forward tip portion and a flange portion with at least four mediate portions between the tip portion and the flange portion. The first mediate portion has an included angle less than that of the second mediate portion. The second mediate portion has an included angle greater than that of the third mediate portion. The fourth mediate portion has the largest included angle.

Abstract: A replaceable digging tooth for an earth auger including a generally oblong body member and a shank depending from the body member and receivable in a support block of the earth auger. The body member includes an elongated leading surface, an elongated trailing surface and first and second side surfaces. The leading surface, trailing surface and first and second side surfaces terminate in a forward working face having a plurality of inserts. Each insert has a generally cylindrical portion integral a top portion which tapers to a point to form a conical tip. The tips of the inserts are aligned to define a linear cutting line which is inclined with respect to a reference plane perpendicular to the axis of the shank and the axes of the inserts are aligned parallel to form a cutting plane which is inclined with respect to the reference plane.

Abstract: A cemented carbide tip for a cutter bit is provided. The tip is rotationally symmetric about its longitudinal axis and has a socket in its rear end for brazine to a steel protrusion on a steel tool shank. A surface of the socket has bumps thereon to maintain a substantially uniform braze joint thickness.

Abstract: A rotatable cutting tool for impacting and fragmenting a substrate. The tool has a tool body containing a valve seat in the forward end thereof wherein a hard insert affixes to the tool body within the valve seat. The hard insert comprises an integral tip segment and an integral axially rearward segment joined to the tip segment by an integral mediate segment. A trio of generally vertically disposed flanges project radially outward from the mediate segment. The flanges are integral with the mediate portion. Each flange presents at least one side surface. During operation, the substrate fragments impinge against the side surface to urge the tool to rotate about its central longitudinal axis.

Abstract: A digging tooth including a body portion and a plurality of hard water resistant conical inserts. The body portion includes a generally planar distal portion, a medial portion, and a bifurcated proximal portion having at least two prongs separated from each other to form a slot. The conical inserts are secured to and spaced along said distal portion and have a generally cylindrical body portion and a top portion which tapers to a point to form a tip, wherein the ratio of the diameter of the cylindrical body portion to the spacing distance between the tips of the conical inserts is between 0.50 and 0.80 and, preferably, 0.72.

Abstract: A rotatable cutting tool having a tool body with a socket contained in the forward end thereof wherein a hard insert is affixed to the tool body within the socket. The hard insert comprises an integral tip portion and an integral cylindrical flange portion joined to the tip portion by integral mediate portion. An integral boss projects from the bottom surface of the flange portion wherein the boss is of a generally frusto-conical shape which corresponds to the generally frusto-conical volume defined by the socket. A plurality of bumps projects from the bottom surface of the flange portion and the frusto-conical surface of the boss to provide for a braze joint of uniform thickness between the hard insert and the tool body.