Abstract: A backing plate for an abrasive flap wheel has a sunk inner part and an outer flange. The sunk inner part has a hub which is provided with a location hole having an internal thread. The internal thread serves to fasten the backing wheel to the threaded shaft of a driving machine.

Abstract: A grinding wheel and a method for grinding bar blade for the production of spiral gear teeth are described. For economical grinding of such bar blades the grinding wheel has a conical grinding surface (Pp) widening from a small diameter (d1) to a large diameter (d2), a cylindrical grinding surface (Ps) adjoining the conical grinding surface (Pp), and a toroidal grinding surface (G) adjoining the cylindrical grinding surface (Ps). The grinding wheel embodied in this manner enables profile grinding (rough grinding) and subsequent generating grinding (finish grinding) of the surfaces of the bar blade without the necessity of remounting the blade. For practical purposes the grinding wheel rotates about a stationary axis (S), and the bar blade to be ground is guided along the grinding wheel at appropriately set angles.

Abstract: The relationship between polishing conditions constituting elements and the worked shape (amount of polishing) obtained by means of these polishing conditions is input beforehand into polishing condition determining means along with the type of the object of polishing, and polishing conditions (invariable polishing conditions) that are used in common for the polishing of this object of polishing. The polishing condition determining means determine the polishing conditions on the basis of these conditions. Specifically, the above-mentioned polishing conditions constituting elements are given in a time series, or combinations of the above-mentioned polishing conditions constituting elements are converted into variations in the swinging velocity of the polishing body, and the swinging velocity corresponding to the swinging position is determined.

Abstract: A superfinishing grindstone suitable for precision grinding, that contains either RB (rice bran) ceramic fine grains or CRB (carbonized rice bran) ceramic fine grains or a combination of both, for use as abrasive grains. The grains of RB ceramic fine grains and CRB ceramic fine grains have multiple small pores which allow the grains to be easily removed from a finished structure. These fine grains have a high Vickers hardness, which makes them highly resistant to bending, scratching, abrasion or cutting.

Abstract: A grinding machine is disclosed comprising a main frame, a wheelhead, a worktable (16), a headstock (12) and tailstock (14) carried by the worktable (16). A computer is supplied with data indicative of at least one operational parameter of the grinding proces, and the wheelfeed is under the control of signals generated by the computer. Two small diameter grinding wheels (22, 24) are mounted on two parallel spindels mounted on a support member (32) and are independently driven by two motors (28, 30) mounted at the other ends of the spindles. The support member (32) is pivotally joined to the wheelhead. The headstock (12) includes a workpiece drive (20) for rotating the workpiece during a grinding, and its speed of rotation is also controlled by signals generated by the computer. The length of the spindles positions each of the motors (28, 30) axially clear of the tailstock assembly when the wheels (22, 24) are aligned to engaged regions of a workpiece nearest to the headstock (22).

Abstract: A honing tool assembly adapted to be chucked in a honing machine for reciprocation and rotation, the assembly comprising a diamond-plated tool for honing cylindrical bores in a workpiece, the diamond-plated tool having a spiral pattern on a cylindrical outer surface, a central bore in the tool adapted to receive a tapered rod engageable with a tapered surface on the central tool opening, the tool being provided with a longitudinal slot that allows the outside diameter of the tool to expand as a force is applied to the tapered rod whereby stock is removed from bore walls of the workpiece with precision roundness and concentricity.

Abstract: The invention can be used in various industries for machining miniature and large sized articles made of sapphire, quartz, ceramic, semiconductor and other hard-to-treat materials, including two-side machined pieces without preglueing. The inventive tool comprises a chuck provided with abrasive elements in the form of pellets fixed thereto. Abrasive filler is arranged between said elements. The density and abrasive grit of said abrasive filler range correspondingly from 0.2 to 0.8 and from 0.01 to 0.5 with respect to the density and abrasive grit of the elements. The inventive composition consists of epoxy resin, diamond-containing abrasive, a hardener, a filler and polyhydride siloxane. The polyhydride siloxane is used in order to form pores when reacting with the hardener during the production of the tool. Said invention makes it possible to produce the tool having a high cutting performance which ensures a high surface finish.

Abstract: A programmable dicing saw is operable with movement of its spindle and work surface for aligning a dicing blade juxtaposed between flanges on the spindle and dicing a substrate along a predetermined blade path. By locating the center of the substrate, an efficient movement of the blade relative to the substrate center rather than the work surface center saves time. Locating the center of the blade includes aligning opposing substrate edges and edge location data entry into a processor for calculation of the substrate center and control based on the substrate center.

Abstract: An apparatus for processing a lens comprising a rotating tool for chamfering used for chamfering a peripheral portion of a spectacle lens, the apparatus comprising: a holding shaft supporting the lens and a lens-holding unit that rotates the holding shaft and displaces the lens towards the finishing unit based on data describing a shape of a lens frame and a rotation angle of the holding shaft; and a means for positioning in an axial direction that displaces the lens in an axial direction of the holding shaft; wherein the rotating tool for chamfering includes a rotating tool having a hemispherical shape, wherein a chamfering angle, or a chamfering amount, is set in accordance with a displacement in the axial direction of the means for positioning in an axial direction and a displacement of the lens-holding unit.

Abstract: An apparatus and method for milling rumble strips into a pavement surface with a cutting wheel. The cutting wheel has rows of a cutting and non-cutting surface and is rotated to alternately present and withdraw a cutting surface and a non-cutting surface to the asphalt and cut a periodic rumble strip pattern as the apparatus moves forward. This alternating pattern is achieved without any up and down motion of the cutting wheel, and the apparatus can be operated a relatively rapid speed.

Abstract: Improved accuracy of grinding glass pieces for use in stained glass art and the like. The pattern of the final outer boundary of each piece of glass is traced onto frosted mylar tracing paper to create a mask. The mask is then cut to the traced pattern and is adhered to a piece of untrimmed glass of area greater than that of the mask, using water resistant adhesive. The outline of the pattern is rendered opaque, for example by an ink marker. Thus prepared, the untrimmed glass is abraded on a powered abrading machine having a flat, horizontal work table, a rotatable abrading element disposed to engage a workpiece supported on the work table, and lamps operating at low voltage arranged to back light the workpiece from therebelow. The untrimmed workpiece exhibits a brightly illuminated zone extending outside the opaque zone of the mask, thus emphasizing glass to be eroded. The workpiece is urged against the rotating abrading element until the illuminated zone is eliminated.

Abstract: The present invention provides a cutting method for hard, brittle materials that is capable of completely cutting through hard, brittle materials such as ceramic, glass, concrete, stone and single crystal materials without the occurrence of edge chipping and at high speed. The present invention is characterized by being a method for completely cutting through a hard, brittle material 1 using a disk-shaped rotary grindstone 2, wherein the cross-sectional shape of the outer peripheral edge 20 of rotary grindstone 2 has a V-shaped pointed shape.

Abstract: A grinding machine for grinding workpieces by abrasive particles with at least one grinding unit having two parts rotatable relative to one another, is characterized in that in a container for receiving articles to be ground is located in rotary manner a disk, that on the container below the disk is provided a rotary drive for the latter and that the axes of the disk and rotary drive are aligned.

Abstract: A circular or non-circular workpiece is ground in a plurality of grinding steps, including a final finish grinding step. A grinding wheel is caused to effect profile generation movement in synchronism with rotation of the workpiece and in accordance with profile data derived from the target shape of the workpiece. In each grinding step, the grinding wheel is advanced in such a manner that the grinding wheel causes cut-in movement within a predetermined cut-in angle defined on the workpiece. After completion of the final finish grinding step, the grinding wheel is retracted over a predetermined back-off angle defined on the workpiece. The retraction is effected in accordance with composite data obtained through combining the profile data and back-off data. The back-off angle is greater than the cut-in angle employed during the final finish grinding step.

Abstract: An equipment is designed to grind and polish a plurality of optical fiber ends and is formed of a holder, and an elastic grinding surface. The holder is used to hold equidistantly a plurality of optical fibers such that the ends of the optical fibers are in contact with the elastic grinding surface capable of only eccentric rotation, thereby enabling instantaneously the grinding speed and the grinding direction of each optical fiber end to be the same. The grinding direction is uniformly changed along with the change in time. The grinding degrees in all direction are substantially the same.

Abstract: A method of manufacturing aluminum frames for photomask protective films comprises the step of: providing a square-shaped hollow or solid strut aluminum material, fastening the bottom end of the aluminum material to a base of a machine tool, using a milling cutter to fabricate and form a hollow trough for a selected depth in the aluminum material from the top surface thereof, and using a cutting tool to cut off the aluminum material at the periphery of the hollow trough to form individual aluminum frames for the photomask protective films. The method of the invention uses fewer chucks and screw bolts during machining, and can reduce chuck setup time and simplify machining processes.

Abstract: The invention proposes a device for grinding or polishing workpieces by means of an abrasive, having a container and a rotary disk located therein and rotatable relative thereto, in which the rotary disk is made from elastic material, is provided with an upwardly directed rim and said rim has a finite spacing from the adjacent inner wall of the container.

Abstract: A device for processing the finish of work pieces. The device has a feed unit with a slide and an NC-controlled drive, a motorized spindle unit with a motor-driven tool spindle, and a force measurement device. The force measurement device is for measuring the contact pressure that is brought to bear upon the tool spindle in the course of processing a work piece. According to the invention, the motorized spindle unit is seated on the slide with resilient elements that accept the weight of the motorized spindle unit and are movable only in the direction of processing. The slide is supported on leaf springs, which are oriented perpendicular to the direction of advance of the slide. The force measurement device is arranged on the motorized spindle unit and on the slide between the connective elements.

Abstract: To provide an electro-deposited thin-blade grindstone containing a plate-shaped base metal, depressed portions that are open from near the edge portion of the base metal to the edge portion and are formed alternately on both side surfaces of the base metal, and a number of abrasive grains fixedly deposited on the depressed portions and protruded from the side surfaces and edge portion of the base metal. The depressed portion is formed in a depth of ½ or more of the thickness of the base metal. The abrasive grain is a hard abrasive grain made of diamond, CBN or the like. The diameter of the abrasive grain is nearly equal to the thickness of the base metal.

Abstract: An end mill grinder have two independently adjustable grinding wheels. The end mill grinder includes two grinding wheels which are located next to each other. Each grinding wheel is rotated by a motor. The grinding wheels are positioned in a manner which allows the first grinding wheel to grind primary clearances of the end mill, while the second grinding wheel grinds secondary clearances of the end mill. The end mill is guided toward the grinding wheels by a finger guide attached to a carriage which supports and retains the end mill. The end mill grinder allows the grinding of primary and secondary clearances in one step.

Abstract: A semiconductor wafer for use in the fabrication of semiconductor devices which includes a circular wafer (13) of semiconductor material having a perimeter and a notch (11) having a wall disposed in the wafer and extending to the perimeter which includes a preferably rounded apex (5) interior of the perimeter and a pair of rounded intersections (7, 9) between the wall and the perimeter. The notch is formed with a tool (23) for forming rounded corners in the semiconductor wafer which includes a body of a material having a hardness greater than the semiconductor wafer which has a generally rounded or paraboloidally shaped front portion having a forwardmost tip (25) portion and a wing portion (27) extending outwardly from the body and having a taper narrowing in the direction of the forwardmost tip portion. The wing portion can be one or more spaced apart wing members or the wing portion can be a single member which extends completely around the tool axis.

Abstract: A presser roll for surface planers is described herein. The presser roll comprises a longitudinal shaft, a radially deformable generally cylindrical sleeve mounted on said longitudinal shaft for rotation in unison therewith and a biasing assembly mounted between the shaft and the sleeve for outwardly biasing the sleeve.

Abstract: A grinding machine, in particular a face grinder for grinding the faces of silicon wafers, has a grinding wheel spindle (20) and a work spindle (22) which are mounted so as to be pivotal about axes (A and B) respectively, each axis being perpendicular to the rotational axis of its respective spindle and being orthogonal to the rotation axis of the other spindle. Three sensors or probes (1 to 3) are provided to measure the position of one spindle relative to the other and to generate signals for controlling servo motors (26, 28) for adjusting the angular orientation of each spindle about its pivotal axis.

Abstract: A description is given of an apparatus and a method for grinding a workpiece, in particular a shaft part. According to the method, the workpiece is clamped in place for the grinding working and its geometry is subsequently ground in such a way as to maintain its dimensions and shape. According to the invention, at least part of the surface of the workpiece is precision-worked at least partly at the same time as the grinding. The apparatus according to the invention has a work-spindle headstock and a tailstock for clamping the workpiece in place as well as a grinding unit with a grinding wheel for grinding the workpiece. The grinding unit and workpiece are arranged movably in relation to each other in a controlled manner. The apparatus according to the invention additionally has a precision-working unit, which can be moved according to the geometry of the workpiece in such a way that at least part of the surface of the workpiece is able to undergo precision working.

Abstract: The present invention is directed to improved apparatus' for dislodging and abrading cryolite encrustations from carbon anodes spent during aluminum smelting. Both the plow blade and flailing elements of the present invention are constructed and arranged to substantially conform to the shape of the spent carbon butts to facilitate rapid and efficient cleaning of the spent carbon anodes' surfaces. Systems and methods employing the substantially V-shaped plow blade extension and dual directional rotating flailing assemblies are also disclosed.

Abstract: An edge face of a deposited film at an edge portion of a device wafer having the deposited film formed on a substrate is polished at a substantially right angle so as to prevent the deposited film from peeling-off and dusting. A forming body having a sectional shape substantially agreeing with that of an edge portion of a device wafer after polishing, which is an object to be polished, is rotated and brought into contact with a polishing body so as to form a polishing portion on the polishing body surface. The edge portion of the object-to be polished is rotated and urged into contact with the formed polishing portion, so that the edge portion of the object to be polished is polished in a sectional shape agreeing with that of the polishing portion of the polishing body. The edge face of the deposited film on the substrate surface is polished not slantingly but at a right angel so as to be removed, so that peeling-off of the deposited film due to a post-process, etc.

Abstract: The present invention provides a multi-layered diamond dicing blade. More particularly, the blade is a multi-layered dicing blade comprising an inner layer with a first set of diamond particles and an outer layer overlying the inner layer. The inner layer extends to the outermost periphery of the dicing blade. The outer layer comprises a second set of diamond particles having a size smaller than the first set of diamond particles.

Abstract: A polishing mechanism for treating a vehicle bumper incorporating with a multi-shaft robot is disclosed. A polishing wheel is rotationally attached to an end of the robot. A rotational positioning device is provided for positioning the bumper in a position within a working range of the robot. The positioning device includes a pair of racks, a main shaft rotationally arranged between the racks and capable of being positioned to a desired angle, a carrying rack arranged on the main shaft, and a plurality of holding devices arranged on the carrying rack for fixedly holding the bumper in position. A detecting device is provided for checking the worn-out of the polishing wheel for adjusting an optimum distance between the polishing wheel and the bumper. The assembly further includes a piloting gauge attached to the robot for determining an appropriate distance between the polishing wheel and the bumper.

Abstract: A very versatile device is proposed for high-precision machining of optical workpieces, in particular optical lenses, which comprises a horizontally displaceable gantry with at least one vertically displaceable tool spindle and a yoke with workpiece holding means mounted so as to be rotatable about a swivel axis by means of journals fitted on both sides. For swivelling of the yoke without gearing and therefore without backlash, a torque motor is provided concentrically to the swivel axis, which motor is directly connected actively with one of the journals.

Abstract: The present invention relates to a method and a device in the chip-removing machining of a work-piece by means of a rotatable tool with a shaft arranged in a headstock. The tool is displaceable in an axial direction both towards and away from the work-piece, and in a plane substantially perpendicular to the arbor. Arranged around a machining point is an enclosure. The enclosure has a first opening that is designed to press tightly against the work-piece around the point to be or being machined. A second opening in the enclosure is made in a wall substantially perpendicular to the shaft. This opening is designed, during machining, to press tightly against a plane plate arranged behind the tool and around the headstock, substantially perpendicular to the arbor, so that during machining there is a substantially enclosed space in the area around the tool and the machining point. The device includes means of delivering cutting fluid to the machining point.

Abstract: A programmable dicing saw is operable with movement of its spindle and work surface for aligning a dicing blade juxtaposed between flanges on the spindle and dicing a substrate along a predetermined blade path. By locating the center of the substrate, an efficient movement of the blade relative to the substrate center rather than the work surface center saves time. Locating the center of the blade includes aligning opposing substrate edges and edge location data entry into a processor for calculation of the substrate center and control based on the substrate center.

Abstract: It comprises a plurality of carrying units mounted on a turntable, with each of the carrying units securing a wheel rim or the like to be polished, and a plurality of polishing units, each one of which includes a polishing element that carries out a polishing operation on the wheel rim, in such a way that for each position of the turntable each one of the carrying units is situated facing a polishing unit.

Abstract: An object of the present invention is to provide a polishing apparatus which is capable of configuring a surface of a polishing tool without damaging the polishing tool. In order to solve the above-mentioned problem, the present invention provide a rotary machining apparatus comprising a polishing tool for polishing a sample; a rotary disk for holding the polishing tool; a tool for configuring a surface of the polishing tool; and a position adjusting mechanism for adjusting a gap between the tool and the polishing tool, which comprises a rotating mechanism for rotating the tool; and a sensor for sensing a change in the rotation of the rotating mechanism, a height at starting to configure the polishing tool using the tool being determined based on the change in the rotation obtained by the sensor.

Abstract: A chip saw in which chips are brazed onto the peripheral edge thereof is clamped, and is rotated while bringing a rotational brush into contact with a honing-subjected portion of the peripheral edge. A liquid, which has dustproof oil and abrasive powder, provided with abrasive properties is supplied to a part in which the rotational brush is in contact with the honing-subjected portion. Therefore, the work efficiency of honing process is improved, and sawdust is not generated. This makes it possible to easily take countermeasures against environmental problems and effectively use resources. In addition, the liquid can be easily recycled.

Abstract: A working apparatus of a magnet member comprises: a transfer path for guiding magnet members to be ground in one direction; transfer means for pushing the plurality of magnet members in a transfer direction to continuously send out the magnet members to the transfer path; a pair of grinding means disposed such as to sandwich the transfer path for grinding opposite surfaces of the transferred magnet member; and pushing means disposed downstream from the grinding means for pushing the magnet member in a direction opposite from the transfer direction. With this structure, it is possible to work the magnet member into a predetermined shape with excellent productivity.

Abstract: A method and a grinding machine for centerless angular plunge grinding a workpiece are disclosed. The workpiece is rotatable about a first axis and has essentially cylindrical sections of different diameter and at least one shoulder located between the sections. The grinding wheel has a conically shaped periphery and is rotated about its axis inclined relative to the workpiece axis by a predetermined angle. The grinding wheel is brought into engagement with the workpiece with at least an axial surface line of its periphery. The grinding wheel and the workpiece are fed-in relative to one another by a predetermined amount of overmeasure. The feeding-in is effected in at least two steps. In a first step the feeding-in is effected essentially in a radial direction. In a second step the feeding-in is effected essentially in an axial direction. In the first step essentially the overmeasure in the area of the cylindrical sections is removed. In the second step essentially the overmeasure of the shoulder is removed.

Abstract: The time to grind a workpiece can be reduced by selecting a grinding wheel whose width is not substantially greater than wheel strength considerations require, and which may therefore be less than the axial length fo the region to be ground providing a work rest or work steady to increase the workpiece stiffness if required, and performing a succession of plunge grinding steps so as to grind the whole of the said axial region. Typically the grinding wheel is an electroplated CBN wheel, and the width of the grinding wheel selected is the narrowest permissible given the desired feed rate and motive power available.

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: This invention relates to an improved apparatus and method for finish machining brake components. The apparatus includes an electrode ring adapted to be secured to a rotatable shaft. The electrode ring includes at least one plurality of circumferentially spaced apart electrodes adapted to be electrically connected to a power supply. Each one of the at least one plurality of electrodes are arranged adjacent each other around the circumference of the electrode ring. The apparatus further includes a positioning mechanism for positioning a rotating, electrically grounded rotor adjacent the electrode ring until sparks are formed between the electrode ring and the rotor. The sparks vaporize a portion of the rotor surface thereby creating a finished surface on the rotor having the desired dimensions.

Abstract: A grinding control unit installed in a tool bit grinder and adapted to control the feeding of a bit relative to a grinding wheel of a grinding unit of the tool bit grinder, the grinding control unit including a U-shaped support, a chuck adapted to hold the bit to be ground, a feeder adapted to control feeding stroke of the bit a swinging control mechanism adapted to control swinging stroke of the bit when feeding the bit, enabling two lips of the tip of the bit to be ground, a horizontal displacement control mechanism adapted to control the depth of bit feeding stroke, enabling the spur of the bit to be well ground.

Abstract: A versatile ultrahoned sharpener includes a stop assembly which contains an inner hardened structure such as being made from metal or ceramic to serve as a positive limiting stop if the knife being sharpened cuts excessively into the plastic stop assembly of the sharpener. The sharpener also includes a manually actuated abrasive surfaced unit for cleaning or shaping the surface of at least one of the sharpening wheels in the sharpener. The sharpener further includes various bearing structures for effectively mounting the motor driven shaft which rotates the abrasive coated disks of the sharpener.

Abstract: This invention relates to an improved apparatus and method for finish machining brake components. The apparatus includes an electrode ring adapted to be secured to a rotatable shaft. The electrode ring includes at least one plurality of circumferentially spaced apart electrodes adapted to be electrically connected to a power supply. Each one of the at least one plurality of electrodes are arranged adjacent each other around the circumference of the electrode ring. The apparatus further includes a positioning mechanism for positioning a rotating, electrically grounded rotor adjacent the electrode ring until sparks are formed between the electrode ring and the rotor. The sparks vaporize a portion of the rotor surface thereby creating a finished surface on the rotor having the desired dimensions.

Abstract: A process for post processing a part that has a Nitinol coating applied by plasma spraying or PVD coating gives the Nitinol desirable properties of toughness and malleability. It also produces a layer of surface material that is extremely hard, chemically non-reactive, electrically and thermally insulating. The process includes selecting a part that has a surface coating of Nitinol applied by plasma spraying or PVD coating and polishing the surface coating to give it a smooth and shiny surface. The polished surface is then cleaned to remove all polishing residue. The surface of the Nitinol coating is heated a temperature in a range of about 400° C. to 900° C.; and is rapidly cooled by forced air flow over the surface coating or by low temperature air or liquid immersion. Thereafter, the outer surfaces of the layer of surface material may be repolished and reheated as before to enhance the layer of thermally produced surface material.

Abstract: An assembly for holding a cylindrical workpiece for grinding, including a support frame having at least one support arm extending to initially hold the workpiece and operable to disengage from the workpiece during grinding, a tailstock slidably mounted on the support frame and operable to engage the proximal end of the workpiece, and a collet assembly mounted on the support frame and configured to receive and engage the distal end of the workpiece. The collet assembly includes a housing having an open proximal end, an open distal end, and an internal channel with an inner diameter. The internal channel extends along the length of the housing from the open proximal end to the open distal end and is adapted to slidingly receive a spindle. The spindle has a proximal end portion and a distal end portion. The proximal end portion includes a holding portion and the distal end extends from the distal end of the housing and is engagable with a drive mechanism.

Abstract: A universal grinding machine having a plurality of workpiece holders, each of which can be moved independently of each other or jointly, by a separate slide, in the longitudinal direction of the workpiece on a slide guide disposed on the machine bed, or which can be fixed independently of each other or jointly to the machine bed.

Abstract: A nitrogen gas supply system for dry-cut working machine, comprising a nitrogen gas generator for separating and extracting only nitrogen gas from the atmosphere, and a supplier for sending the extracted nitrogen gas to a working part. The nitrogen gas obtained from the atmosphere can effectively be supplied to a workpiece.

Abstract: A plunger tool for producing a special prophylactic is disclosed. The special features of the plunger tool reside in the special curvatures in its shaped section. The shaped section of the plunger tool exhibits an extreme narrowing, at the deepest point of which there may be at least one annular groove. Unlike prior art transitions, the transition from the large diameter to the reservoir section is not steep and straight but takes the form of an S-shaped curve. An exact contour of the annular grooves on the surface of the plunger tool is essential for their production and can be done only by the use of a precision diamond abrasive point.

Abstract: A versatile ultrahoned sharpener includes a stop assembly which contains an inner hardened structure such as being made from metal or ceramic to serve as a positive limiting stop if the knife being sharpened cuts excessively into the plastic stop assembly of the sharpener. The sharpener also includes a manually actuated abrasive surfaced unit for cleaning or shaping the surface of at least one of the sharpening wheels in the sharpener. The sharpener further includes various bearing structures for effectively mounting the motor driven shaft which rotates the abrasive coated disks of the sharpener.

Abstract: A method is provided for processing a metal foil sheet to produce magnetic recording media. The method comprises providing an elongate metal foil sheet having a first side and a second side. The sheet is advanced through a plurality of processing stations in equal unit length segments such that each segment receives the same treatment to form a magnetic recording medium from each segment. Method are also provided to prepare the foil surfaces by polishing, texturing, cleaning, and stress relieving, to coat the prepared surfaces with at least one metal layer, to finish the coated layers by buffing, burnishing, and lubricating, and to form disk units from the prepared, coated and finished surfaces.

Abstract: The present invention relates to a grinding cup and a wear part for grinding of cutting inserts of a rock drill bit. The grinding cup is provided to be rotatably mounted in a grinding machine. The grinding cup is provided to perform grinding of cutting inserts of a rock drill bit. The grinding cup comprises a shank, a flush channel, and a wear part having a recess. The grinding cup has a center axis and is provided with vibration dampening means. The wear part is resilient in the grinding cup in at least the axial direction relative to the shank and the vibration dampening means forms contact surfaces with cooperating parts. The contact surfaces have substantially the same radial extension.