Abstract: A conveyor belt sanding assembly includes a panel is comprised of a rigid material. A pair of clips is each coupled to the panel and each of the clips releasably engages a paddle of a mail sorting machine thereby mounting the panel to the paddle. A sheet of sand paper is bonded to the panel and the sheet of sand paper is positioned on an opposing surface of the panel with respect to the clips. In this way the sheet of sand paper is directed toward the conveyor belt of the mail sorting machine. The sand paper abrades the conveyor belt when the paddle is moved against the conveyor belt to enhance the capacity of the conveyor belt to frictionally engage mail that is being sorted by the mail sorting machine.

Abstract: A seaming station and method of seaming utilizing two robot arms with seaming heads coupled thereto to seam a large lite by working in conjunction with one another or simultaneously seaming two lites independently of one another.

Abstract: A grinding device of a travel path, on which traveling wheels of a rail-type vehicle roll, includes a grinder which grinds a surface layer of a travel path, a frame on which the grinder is provided, and a device traveling wheel mounted on the frame. The device traveling wheel rolls along the travel path on the top surface of the standard rail extending in the extending direction of the travel path.

Abstract: The present invention relates to a hammer union restoration apparatus wherein a main sanding unit is mounted to a base. The main sanding unit including a sander for sanding the four side faces of a lug formed on the hammer union. The sander being resiliently movable in a direction away from a side face of the lug. The sander is movable under control of a motor to rotate the sander relative to the lug around the four faces of the lug with the sander floating across the corner edges of the four faces. The present invention further includes a sander for sanding the end face of the lug.

Abstract: An object is to provide a burnishing method in which it is possible to reduce the flying height of a magnetic head by improving the smoothness of the surface of a magnetic disk while suppressing contamination of the magnetic disk due to falling-off or crushing of abrasive grains from a polishing tape. In the burnishing method, an alignment process of adjusting the position in a thickness direction of a magnetic disk 10 of an outer peripheral plate 75 installed outside an outer peripheral end 10c of at least one of the magnetic disk 10 and the magnetic disk 10 so as to make the surface of the outer peripheral plate 75 and the surface of the magnetic disk 10 become flush with each other is performed between a substrate installation process and a burnishing process.

Abstract: A polishing apparatus polishes a periphery of a substrate by bringing a polishing tool into sliding contact with the substrate. The polishing apparatus includes a substrate-holding mechanism configured to hold a substrate and rotate the substrate, a polishing mechanism configured to press a polishing tool against a periphery of the substrate so as to polish the periphery, and a periphery-supporting mechanism configured to support the periphery of the substrate by a fluid. The periphery-supporting mechanism is configured to support a surface of the substrate from an opposite side or the same side of the periphery of the substrate.

Abstract: A sharpening device for cutting blades includes a support shell, at least two rollers rotatably mounted to the shell for rotating about respective substantially parallel first rotation axes and offset along a first substantially radial center-to-center direction, the rollers having respective contiguous grinding peripheral surfaces delimiting a working zone designed to receive a blade to be sharpened, the grinding surfaces being elastically yieldable to conform to the profile of the blade.

Abstract: A sharpening device for cutting blades includes a support shell, at least two rollers rotatably mounted to the shell for rotating about respective substantially parallel first rotation axes and offset along a first substantially radial center-to-center direction, the rollers having respective contiguous grinding peripheral surfaces delimiting a working zone designed to receive a blade to be sharpened, the grinding surfaces being elastically yieldable to conform to the profile of the blade.

Abstract: An object is to provide a burnishing method in which it is possible to reduce the flying height of a magnetic head by improving the smoothness of the surface of a magnetic disk while suppressing contamination of the magnetic disk due to falling-off or crushing of abrasive grains from a polishing tape. In the burnishing method, an alignment process of adjusting the position in a thickness direction of a magnetic disk 10 of an outer peripheral plate 75 installed outside an outer peripheral end 10c of at least one of the magnetic disk 10 and the magnetic disk 10 so as to make the surface of the outer peripheral plate 75 and the surface of the magnetic disk 10 become flush with each other is performed between a substrate installation process and a burnishing process.

Abstract: The present invention relates to a one-circle two-chamfer deburring machine and a deburring method comprising the following steps after starting up: (1) The upper wheelhead motor drives the upper grinding belt to rotate horizontally (2) the lower wheelhead motor drives the lower grinding belt to rotate horizontally and (3) when a deburred workpiece goes through a passage formed by the active feeding roller row and the upper grinding belt, an upper abrasive block elastically contacts surface of the workpiece and, under the drive of the upper wheelhead motor and the upper active drum, polishes and deburrs the front side of the workpiece twice; the lower abrasive block elastically contacts the surface of the workpiece and, under the drive of the lower wheelhead motor and the lower active drum, polishes and deburrs the back side of the workpiece twice.

Abstract: The disclosure relates to a finishing apparatus for finish machining of rotationally symmetric workpiece surfaces having a finish belt guide which has a guiding body for guiding the finish belt, wherein the guiding body comprises a shell-like guiding surface along which the finish belt can be guided or is guided between an insertion end of the finish belt and a withdrawal end of the finish belt, wherein the guiding surface is mounted in a resiliently elastic manner in the radial direction, wherein, when seen in the circumferential direction, the guiding surface extends in a continuous manner between the insertion end of the finish belt and the withdrawal end of the finish belt over at least a part of the width of said guiding surface and is mounted in a resiliently elastic manner.

Abstract: A method of form transfer grinding a three-dimensional shape utilizes a form transfer tool over which a belt is driven. The form transfer tool includes a shape that is desired in the finished part and guides a belt that grinds an area of a part to a finished or nearly finished condition.

Abstract: A method of form transfer grinding a three-dimensional shape utilizes a form transfer tool over which a belt is driven. The form transfer tool includes a shape that is desired in the finished part and guides a belt that grinds an area of a part to a finished or nearly finished condition.

Abstract: An apparatus for machining a strip- or plate-shaped metallic workpiece is proposed, in particular for the deburring of cut edges and/or for the grinding of surfaces of the workpiece, having at least one machining unit which has a revolving drive device which directs a machining element at least approximately linearly past the region of the workpiece to be machined obliquely or transversely to the feed direction of the workpiece. According to the invention, the machining element is designed as a grinding belt, the grinding belt, in the region of the workpiece to be machined, being in operative connection with the drive device in such a way that the drive device drives the grinding belt, and the grinding belt and the drive device are separate from one another at least in a region remote from the workpiece.

Abstract: A method for manufacturing magnetic recording tape includes applying a front coat including a magnetic component to a substrate to provide a coated substrate. The coated substrate defines a first face and an opposing, second face, the first face extending between a first corner and an opposing, second corner, and the second face extending between a third corner and an opposing, fourth corner. An abrasive surface is moved against the first corner of the coated substrate to abrasively remove a volume of material from the first corner. In particular, the abrasive surface is angularly offset at a substantially non-orthogonal angle from the first face of the coated substrate.

Abstract: A hair-line processing, and more particularly a sheet metal finished by continuous hair-line on its plane and curved surface, and apparatus and method for finishing by continuous hair-line on the same are disclosed, wherein the sandpaper curvaceously advances to form hairlines relative to curved surface of the sheet metal, and operation of a pressure unit can vary the curvaceous degree of the sandpaper to form a continuous hairline relative a sheet metal including curved surfaces each having a different curvature.

Abstract: An apparatus for machining a strip- or plate-shaped metallic workpiece is proposed, in particular for the deburring of cut edges and/or for the grinding of surfaces of the workpiece, having at least one machining unit which has a revolving drive device which directs a machining element at least approximately linearly past the region of the workpiece to be machined obliquely or transversely to the feed direction of the workpiece. According to the invention, the machining element is designed as a grinding belt, the grinding belt, in the region of the workpiece to be machined, being in operative connection with the drive device in such a way that the drive device drives the grinding belt, and the grinding belt and the drive device are separate from one another at least in a region remote from the workpiece.

Abstract: A belt grinding finishing tool incorporates a pair of mounting arms projecting forwardly from a drive housing to support a single abrasive belt entrained around drive and idler pulleys. The first mounting arm is positionally fixed relative to the drive housing, but the second mounting arm is pivotally mounted to permit relative pivotal movement thereof. The dual mounting arm configuration enables a tubular member to be placed between the mounting arms to effect a finishing of opposing sides of the outer surface of the tubular member simultaneously. A support housing detachably mounted on the drive housing includes a support handle that can be selectively connected to alternative attachments mounts formed on the support housing. An actuation lever extending outwardly from the second mounting arm permits the operator to cause pivotal movement of the pivoted second mounting arm to accept the tubular member to be finished between the mounting arms.

Abstract: A method and apparatus for planarizing a microelectronic substrate. In one embodiment, the apparatus can include an elongated, non-continuous polishing pad oriented at an angle relative to the horizontal to allow planarizing liquids and materials removed from the microelectronic substrate to flow off the polishing pad under the force of gravity. Two such polishing pads can be positioned opposite each other in a vertical orientation and can share either a common platen or a common substrate carrier. The polishing pads can be pre-attached to both a supply roll and a take-up roll to form a cartridge which can be easily removed from the apparatus and replaced with another cartridge.

Abstract: Systems and methods control abrading operations of an abrading machine by sensing characteristics of an abrading article installed on the abrading machine. When a problem is discovered by sensing the article, appropriate actions may be taken. As one example, the abrading article may be sensed to determine whether the abrading article has been installed with an abrasive side facing the wrong direction. An alert allows an operator to reinstall the article. As another example, the abrading article may be sensed to determine whether splicing tape is present to hold two pieces of abrading tape together. The article may be advanced until the splicing tape is beyond an abrading zone. As another example, the abrading article may be sensed to determine whether the abrading article has stopped moving while the article drive is advancing because the article has broken. An alert allows an operator to repair the break.

Abstract: A stacked three head finishing apparatus is provided. The apparatus includes a base mountable to a floor, a first head mounted to the base, a second head mounted to the base above the first head, and a third head mounted to the base above the second head. Each of the first, second, and third heads includes a rotatable wheel. A motor imparts rotation to the wheel which may then be used for finishing operations. The height of each head above the floor and the position relative to one another is pre-selected to ensure that all of the heads are within reach of a robot arm and to ensure that nothing will interfere with the movement of the robot arm.

Abstract: A substrate processing apparatus is used for removing surface irregularities occurring on a peripheral portion (a bevel portion, an edge portion, and a notch) of a substrate, such as a semiconductor wafer, and films deposited as a contaminant on the peripheral portion of such a substrate. The substrate processing apparatus includes an edge-portion polisher for pressing a polishing tape against an edge portion of a substrate and causing relative movement between the polishing tape and the substrate to polish the edge portion of the substrate, and a bevel-portion polisher for pressing a polishing tape against a bevel portion of the substrate and causing relative movement between this polishing tape and the substrate to polish the bevel portion of the substrate.

Abstract: Chamfer processing is carried out by making plate material W end faces come in contact with rotating grinding belts. The grinding surfaces of the opposing side by side grinding belts are on the centerline in the thickness direction of the plate material. The center point is considered the pivot point as seen from the plate material end faces and in distance is smaller than the thickness of the plate material. Pivot motion of the plate material is carried out in the rotating direction of grinding belts. This chamfer processing method and device enables chamfer in a small curvature radius without applying a heavy tension load on grinding belts, and performs uniform deep chamfer processing of multiple plate material simultaneously.

Abstract: An inline-ready method of finishing the surface of a long material (W) capable of preventing any environmental problem from occurring and the mechanical properties of the long material from deteriorating, comprising the steps of holding the long material (W) by two or more elastic endless belts (1) with a specified force, rotating the elastic endless belts (1) in the same direction as or in the reverse direction to the moving direction of the long material by moving the long material (W) and increasing or decreasing the rotating speed of the elastic endless belts (1) more than or less than the moving speed of the long material, and loading powder and granular grinding material (S) between the elastic endless belts (1), characterized in that the grinding material (S) is moved relative to the long material (W) to rub the grinding material (S) against the long material (W) so as to finish the surface of the long material (W).

Abstract: An apparatus for smoothing a surface of a rotatably supported substrate includes a base plate, a block having an extending arm structure and being attached to the base plate so as to be movable along the surface of the base plate, a roller attached to a tip portion of the arm structure in a direction perpendicular to the base plate, a mobile member attached to the arm structure so as to be movable perpendicularly to the axial direction of the roller, a tape-running device attached to the base plate for feeding and taking up a polishing tape through the roller so as to advance the tape around the mobile member, and a moving device attached to the arm structure of the block for moving the mobile member.

Abstract: A film feeder (FF1) feeds a film (1), a first drive (20) rotates a work (W), a second drive (30) moves the work (W) relative to the film(1), a shoe set handler (40) handles the shoe set (2) to press the film (1) against the work (W), and a deterioration delayer (C) is configured to delay an abrasivity deterioration of the film (1).

Abstract: An adjusting device for the sanding drum of a double-drum sander is installed between the opposite ends of the rear grinding drum and the machine frame of a sander for adjusting a rear sanding drum to a most suitable height to match with the size number of the emery of the front sanding drum of the sander so as to carry out abrading with excellent effect.

Abstract: An apparatus for chemically mechanically planarizing a semiconductor wafer is disclosed having a continuous polishing strip with first side having a fixed abrasive surface and a second side opposite the first side. In one embodiment, a first drive roller holds a first end of the polishing strip, a second drive roller holds a second end of the polishing strip, and a pair of support rollers contacts the second side of the polishing strip on either end of a polishing strip support. A drive motor is operably connected to the first and second drive rollers for moving the polishing strip in a linear, bi-directional manner.

Abstract: A tensioning assembly for a polishing belt on a linear chemical mechanical polishing apparatus. The tensioning assembly comprises first and second rollers which are operably engaged by respective air cylinders and exert a selected degree of downward tension on the lower run of the horizontal polishing belt. A third roller biased typically by a spring pushes upwardly on the lower run of the belt between the first and second rollers. Accordingly, the first and second rollers, in conjunction with the third roller, tension the belt on the apparatus to maintain optimum material removal rates and uniformity. The degree of tension exerted on the belt can be varied according to stretching of the belt resulting from prolonged use.

Abstract: An apparatus for sizing and sanding a workpiece, the apparatus comprising a housing having a horizontally throughgoing passage, a feed conveyor for advancing the workpiece through the passage, the workpiece having an upper surface that advances through the passage along a pass line, a sanding station for finishing the upper surface, and a planing station for sizing the workpiece along the upper surface. The planing station of the present invention has a driven planer head, an antikickback assembly, a chip-break assembly, and means for disengaging the planing station to convert the apparatus from a planing and sanding configuration to a sanding-only configuration.

Abstract: A method and apparatus for planarizing a microelectronic substrate. In one embodiment, the apparatus can include an elongated, non-continuous polishing pad oriented at an angle relative to the horizontal to allow planarizing liquids and materials removed from the microelectronic substrate to flow off the polishing pad under the force of gravity. Two such polishing pads can be positioned opposite each other in a vertical orientation and can share either a common platen or a common substrate carrier. The polishing pads can be pre-attached to both a supply roll and a take-up roll to form a cartridge which can be easily removed from the apparatus and replaced with another cartridge.

Abstract: An inline-ready method of finishing the surface of a long material (W) capable of preventing any environmental problem from occurring and the mechanical properties of the long material from deteriorating, comprising the steps of holding the long material (W) by two or more elastic endless belts (1) with a specified force, rotating the elastic endless belts (1) in the same direction as or in the reverse direction to the moving direction of the long material by moving the long material (W) and increasing or decreasing the rotating speed of the elastic endless belts (1) more than or less than the moving speed of the long material, and loading powder and granular grinding material (S) between the elastic endless belts (1), characterized in that the grinding material (S) is moved relative to the long material (W) to rub the grinding material (S) against the long material (W) so as to finish the surface of the long material (W).

Abstract: An automated planer machine for planing a piece of lumber. The planer machine has a feed table for slidably receiving the bottom surface of the piece of lumber along a traveling course. One or more planing heads extend on sides of the traveling course to plane the surfaces of the piece of lumber. A linebar laterally guides the piece of lumber. Feed rolls along the traveling course move the piece of lumber. Positioning devices responsive to respective control signals are provided for adjusting a height of the feed table and planing levels of the planing heads as much when the planer machine is idle as during operation. Position encoders coupled to the feed table and the planing heads produce positional signals usable to accurately position them using the positioning devices.

Abstract: The invention relates to a device for the finishing treatment of shaft workpieces, in particular crankshafts and camshafts. The device comprises a carrier, at least one jaw for exerting contact pressure on the workpiece, and a linear guide for guiding the jaw. The linear guide is supported by a transverse guide to form a cross guiding system which follows the rotational motion of the workpiece by revolving around its axis of rotation. The transverse guide contains a main carriage guided on the carrier. The main carriage is radially aligned with respect to the axis of rotation of the workpiece. The main carriage has a fork-shaped head facing towards the side of the workpiece. A guide rail for the linear guide is chucked between the between the legs of the fork-like head.

Abstract: An agent used for texturing a surface of a substrate for a magnetic disk includes an aqueous solution containing a glycol compound serving as surfactant in an amount of about 1-25 weight % and agglomerated polycrystalline diamond particles with average diameter of 0.01-2 &mgr;m in an amount of 0.001-3 weight % formed with very small polycrystalline diamond particles with average diameter of 1-20 nm. When the substrate surface is textured, the substrate is rotated, the agent is supplied to the target surface to be textured and a polishing tape is pressed and run against it. A substrate thus processed has a surface with very fine and uniform textured lines without any abnormal protrusions.

Abstract: An apparatus for chemically mechanically planarizing a semiconductor wafer is disclosed having a continuous polishing strip with first side having a fixed abrasive surface and a second side opposite the first side. In one embodiment, a first drive roller holds a first end of the polishing strip, a second drive roller holds a second end of the polishing strip, and a pair of support rollers contacts the second side of the polishing strip on either end of a polishing strip support. A drive motor is operably connected to the first and second drive rollers for moving the polishing strip in a linear, bi-directional manner.

Abstract: A polishing apparatus includes a polishing device for polishing a baseboard, a feeding device for transporting it to the polishing device and a discharging device for discharging the polished baseboard from the polishing device. The baseboard is clamped in one direction between rollers of the feeding device and is transported upwards while polishing tapes are run and backup members for pressing the polishing tapes to the baseboard undergo reciprocating motions in a perpendicular direction to polish both surfaces of the baseboard. The polished baseboard is transported further upwards, being clamped between rollers of the discharging device.

Abstract: A polishing apparatus includes a lapping tape for polishing a surface of a magnetic disc, a tape supply unit for supplying the lapping tape, a varnisher roller for pressing the lapping tape onto the surface of the magnetic disc, and a pressing unit for pressing the lapping tape to the surface of the magnetic disc by way of the varnisher roller. The pressing unit is constituted by a swing lever having the varnisher roller at one end portion, and a balance adjusting unit. The balance adjusting unit sets the pressing force to zero by establishing the balance of the swing lever, and then breaks the balance so as to press the lapping tape to the surface of the magnetic disc by way of the varnisher roller with a desired pressing force.

Abstract: A machine for grinding cylindrical bearing surfaces on parts, in particular journals and/or crank pins on crankshafts, using an abrasive belt, includes a support on which three abrasive belt clamping members are mounted in a triangle and mobile in directions that converge toward the axis of the bearing surface to be ground. Each clamping member carries at least one applicator shoe conformed to press the abrasive belt against the bearing surface along a surface essentially limited to a generatrix parallel to the axis of the bearing surface. The shoe is preferably made from an elastomer having a Shore hardness at most equal to 100 and has a cylindrically curved applicator surface with a radius of curvature less than the radius of curvature of the bearing surface.

Abstract: Disclosed is an apparatus for grinding spherical objects into an exact spherical shape. The sphere-reshaping apparatus comprises a grinding section equipped with means for grinding spherical objects, an inlet section equipped with means for feeding spherical objects to the grinding section and an outlet section equipped with means for taking out reshaped spherical objects from the grinding section. The inlet section, grinding section and outlet section communicate by transporting means. The transporting means comprises an endless carrier belt having a series of apertures made for accepting spherical objects and a drive for driving the endless carrier belt. In the grinding section an endless grinding belt runs parallel with the endless carrier belt in same or counter direction relative to the endless carrier belt at such a speed that causes spherical objects to rub on the grinding belt.

Abstract: Apparatus for removing random scratches formed during the polishing of magnetic recording media, and for disposing on the surface of the media a near-circumferential texture which increases the recording reliability of the media while simultaneously reducing its failure rate. The present invention teaches the application of a low unit load force to a pad and polishing tape combination in contact with a rotating and oscillating disk surface to completely remove the random scratches previously formed by a polishing step. The apparatus facilitates the application of a specially designed, extremely fine alumina slurry composition without producing similar size circumferential scratches at the high surface speeds.

Abstract: A method and apparatus for planarizing a microelectronic substrate. In one embodiment, the apparatus can include an elongated, non-continuous polishing pad oriented at an angle relative to the horizontal to allow planarizing liquids and materials removed from the microelectronic substrate to flow off the polishing pad under the force of gravity. Two such polishing pads can be positioned opposite each other in a vertical orientation and can share either a common platen or a common substrate carrier. The polishing pads can be pre-attached to both a supply roll and a take-up roll to form a cartridge which can be easily removed from the apparatus and replaced with another cartridge.

Abstract: An apparatus for repositioning and forming a power transmission belt. The apparatus has first and second hangers for supporting a plurality of power transmission belts and movable selectively between active and inactive positions. Each of the first and second hangers has a storage portion and a standby portion. At least one shifting mechanism is operable to move a power transmission belt from the storage portion to the standby portion on each of the first and second hangers. A first belt running unit has a first pulley around which a power transmission belt can be placed. The first belt running unit is movable selectively between a processing position and an attaching/detaching position. A second belt running unit has a second pulley around which a power transmission belt can be placed. The second belt running unit is movable selectively between a processing position and an attaching/detaching position.

Abstract: A brush deburring machine includes upper and lower synchronized dogged conveyors that translate workpieces between a pair of cylindrical wire brushes to remove burrs from the ends of the workpieces. A first support surface is defined on each of the dogs of the upper conveyor, and a second support surface is defined on each of the dogs of the lower conveyor. Workpieces are retained between the first and second support surfaces to prevent the workpieces from becoming unstable and shifting diagonally between the wire brushes, yet are permitted to rotate with respect to the first and second support surfaces to cause the entire circumference of the ends of the workpieces to be deburred.

Abstract: A two surface planer includes a lower base with a rear stationary table and a front sloped member sloping up to an intermediate portion, an adjusting base with an upper horizontal surface, and an activating rod pivot-ally connected with the adjusting base and the sloped member to let the adjusting base lifted up and lowered down on the sloped member. A lower cutter head is further provided in the intermediate portion of the lower base, having an lateral upper opening for a cutter of a lower cutter shaft rotatably contained in the lower cutter head, with the cutter protruding up out of the opening for a preset distance. When the adjusting base is lowered below the cutter by operation of the activating rod rotated by a hand wheel, the cutter can plane wood workpiece, and then two surfaces (the upper and the lower) of wood can be planed synchronously.

Abstract: Apparatus for removing random scratches formed during the polishing of magnetic recording media, and for disposing on the surface of the media a near-circumferential texture which increases the recording reliability of the media while simultaneously reducing its failure rate. The present invention teaches the application of a low unit load force to a pad and polishing tape combination in contact with a rotating and oscillating disk surface to completely remove the random scratches previously formed by a polishing step. The apparatus facilitates the application of a specially designed, extremely fine alumina slurry composition without producing similar size circumferential scratches at the high surface speeds.

Abstract: A deburring machine having a work table with a side guide mounted thereto so as to define a first work zone for the lower peripheral edge of the cylindrical workpiece. A continuous elongated belt having an abrasive surface is mounted to the work table so as to engage the lower edge of the workpiece in the first work zone. A second side guide is spaced vertically from the work table in parallel alignment with the first side guide in conjunction with an overhead guide that engages the upper circular surface of the workpiece. The overhead guide and second side guide define a second work zone substantially in alignment with the first work zone, and a second continuous elongated abrasive belt engages the upper peripheral edge of the workpiece in the second work zone.

Abstract: Method for removing random scratches formed during the polishing of magnetic recording media, and for disposing on the surface of the media a near-circumferential texture which increases the recording reliability of the media while simultaneously reducing its failure rate. The present invention teaches the application of a low unit load force to a large surface pad and polishing tape combination while in contact with a rotating disk surface that is also moving in a circumferential direction to completely remove the random scratches previously formed by a polishing step. The scratches are removed with the aid of a specially designed, extremely fine alumina slurry composition which prevent producing similar size circumferential scratches at the high surface speeds. The methodology provides for a smoother disk surface than prior known super-polish/texture methodologies.

Abstract: An apparatus for finishing a surface of a camshaft extending along an axis with the surface offset from the axis has a drive for rotating the camshaft about the axis, a support displaceable radially of the axis, and a plurality of pusher heads on the support. The heads are movable independently of each other toward and away from the camshaft relative to the support along respective angularly offset pusher axes extending radially of the camshaft. All the pusher heads are biased along the respective pusher axes toward the camshaft axis with substantially the same force.

Abstract: Abrasive belt machine tool for machining cylindrical bearing surface on shafts, in particular journals on camshafts or journals and/or crank pins on crankshafts, comprising for machining each bearing surface two opposed jaws 5 mounted on two arms 1 and each having first and second concave application surfaces 6a, 6b having different diameter in at least two different positions. The abrasive belt 9 passes in front of the concave surfaces 6a and 6b of the two jaws 5. The support 2 of the arms is mobile between at least two positions such that in one of said positions the first concave surface 6a can apply the abrasive belt 9 to a bearing surface 8a having a corresponding diameter on a first shaft and in the other of said positions the concave surfaces 6b can apply the abrasive belt 9 to a bearing surface having a corresponding diameter on a second shaft.