Abstract: A method for synchronous control of a gantry mechanism with online inertia matching is applicable to a machine tool equipped with a gantry mechanism. The gantry mechanism includes two rails, a crossbeam and a saddle, in which the saddle is disposed on the crossbeam, and the crossbeam is disposed by crossing the two rails. Each of the two rails is furnished with a driving apparatus for synchronously driving the crossbeam, and the driving apparatus includes a drive motor and a lead screw. This method includes the steps of: obtaining gantry-mechanism information; detecting position information of the saddle on the crossbeam; evaluating the position information and the gantry-mechanism information to derive load-inertia variety information; and, evaluating the load-inertia variety information to adjust torque-output information of the drive motor corresponding to the respective driving apparatus.

Abstract: A ski or snowboard edge sharpener may include an abrasive grinding wheel, a belt-driven drive train or direct drive system that connects a motor and grinding wheel drive mechanism and decreases the grinding wheel's speed of rotation relative to the speed of the motor, a grinding wheel mount allowing selection and use grinding wheels of different grits and materials and grinding wheel controls allowing the control of the cut depth and the grinding wheel angles relative to the longitudinal and transverse planes of the ski edge surface to be sharpened. The sharpener may alternatively include a grinding wheel and motor that drives the grinding wheel drive mechanism. Such configurations may allow repeated sharpening of a ski edge at specific/chosen angles with a specific/chosen surface finish. A position lockdown device that is part of each of the control mechanisms and a vacuum system to capture grinding residue may be included.

Abstract: A coating can be provided on a substrate. Fabrication of the coating can include forming a solid layer in a specified region of the substrate while supporting the substrate in a coating system using a gas cushion. For example, a liquid coating can be printed over the specified region while the substrate is supported by the gas cushion. The substrate can be held for a specified duration after the printing the patterned liquid. The substrate can be conveyed to a treatment zone while supported using the gas cushion. The liquid coating can be treated to provide the solid layer including continuing to support the substrate using the gas cushion.

Abstract: A protective enclosure for protecting well head equipment at a surface location is made up of an open framework of structural members which surround and protect the well head. Individual steel panels are assembled to form a series of upstanding walls which are covered by a series of roof panels and which together define the quasi-enclosed area surrounding the well head. The roof panels are covered with a steel grating which forms a covered roof for the protective enclosure. The tubing which makes up the steel panels is spaced to allow access to the enclosed area by a worker needing to access the well head. Upright legs of the steel panels are joined together by hinged brackets. The panels can also be secured to the surrounding terrain by a cemented retainer arrangement.

Abstract: A belt adjusting device of a printer includes a bracket, a base, a driving device, and a resisting member. The bracket includes a bottom wall and a belt placed on the bottom wall. The belt is loop-shaped. The base is slidably mounted to the bracket. The driving device is mounted to the base and includes an eccentric device engaging with the belt. The resisting member resists the driving device to enable the eccentric device to rotate to adjust the belt when the base slides relative to the bracket.

Abstract: A fully symmetric cutter grinding machine with 5-axis includes a grinding machine base and a pillar, sliding rails are vertically arranged on an inside of the pillar, the sliding rails are provided with a grinding wheel head bracket, the grinding wheel head bracket comprises torque motors vertically provided, a lower part of the torque motor is connected to a horizontally provided spindle by means of a bearing of a rotation table, grinding wheels rotating around an axis of the spindle are symmetrically provided at two sides of the spindle, the grinding wheel head bracket further comprises a big rotatable pulley provided at an upper part of the grinding wheel head bracket and driven to rotate by spindle motors, the big pulley is connected to a spindle pulley by a wide synchronous belt.

Abstract: A portable cutting apparatus (1) for the in situ truncation of railway rails (9) comprises a rail saw (2) having a motor (3) with a cyclic movement output member (4), a plate holder (5) adapted to carry an abrasive blade (6) and a movement transmitter (7) engaging the motor output member (4) and the plate holder (5) to set the plate holder (5) in a cyclic movement, a linkage structure (27) with a rail connector (29) and a saw connector (31) and a sawing position alternator (45) to autonomously and alternately move the plate holder (5) to and fro.

Abstract: A support accessory is disclosed for a hand tool, such as a grinder or polisher. The support accessory is configured to be detachably fastened to the hand tool. The support accessory includes a frame with a longitudinal beam configured to stabilize the hand tool front-to-back when the hand tool is fastened to the support accessory, as well as a trunnion rotatably coupled to the frame and configured to stabilize the hand tool side-to-side when the hand tool is fastened to the support accessory. The support accessory is also configured to support the hand tool in a position that is substantially parallel to a surface of a workpiece during use.

Abstract: An abrasive article for polishing a substrate surface. The abrasive article includes a holder pad assembly and an abrasive member held in place with respect to a holder pad. The abrasive member further includes a first surface engaged with the holder pad assembly, and a second surface including an abrasive. A preload mechanism is positioned to bias the second surfaces of the abrasive member toward the substrate surface. One or more fluid bearing features on the second surface of the abrasive member is configured to generate lift forces during relative motion between the abrasive article and the substrate surface.

Abstract: A polishing mechanism includes a support base, a pair of magnetic valves, a first polishing assembly and a second polishing assembly. The pair of magnetic valves are mounted in the support base. The first polishing assembly and the second polishing assembly are mounted on the support base and connected to the pair of magnetic valves respectively. The second polishing assembly is arranged perpendicular to the first polishing assembly. The first and the second polishing assemblies are respectively controlled by the pair of magnetic valves to polish one or more workpieces. The present disclosure further discloses a manipulator using the polishing mechanism.

Abstract: An abrasive article for polishing a surface of a workpiece. The abrasive article includes a plurality of polishing islands arranged to interact with a workpiece to maintain a substantially constant contact area. Abrasive features are associated with at least some of the plurality of polishing islands. The abrasive features apply cutting forces to the work piece during motion of the abrasive article relative to the workpiece.

Abstract: An abrasive article having an array of abrasive members with an elastomeric support that permits each abrasive member to move independently in at least pitch and roll. Each abrasive member maintains a fluid bearing (air is the typical fluid) with the substrate. The abrasive members are capable of selectively engaging with nanometer-scale and/or micrometer-scale height variations and micrometer-scale and/or millimeter-scale wavelengths of waviness, on the surfaces of substrates. The spacing and pitch of the abrasive members can be adjusted to follow the topography of the substrate to remove a generally uniform layer of material; to engage with the peaks on the substrate to remove target wavelengths of waviness; and/or to remove debris and contamination from the surface of the substrate.

Abstract: An electric tool, particularly a saw, has a connecting region and an actuating handle. The actuating handle is pivotally arranged on the connecting region, wherein the actuating handle can be pivoted into a number of pivoted positions and the actuating handle has at least one actuating switch for the electrical actuation of the electric tool. An uncomfortable position of the hand during actuation of the actuating handle is avoided and a high degree of comfort is achieved by the connecting region and the actuating handle being connected to each other by way of an articulated connection and by the articulated connection having a bearing lug and a handle pivot pin in engagement with the bearing lug.

Abstract: A base for sanding machines, grinding machines or the like includes a body (10) connectable to a machine (M) or integral therewith, the body (10) being provided with at least three supports (P) arranged in such a manner that their ends (P?) lie on a plane (L) and configured in such a manner that at least one tool (T) of the machine projects at least partly beyond the plane (L) by a portion (D), the body (10) being provided with elements adapted to vary the position of the plane (L) with respect to the tool (T).

Abstract: A machining installation for workpieces comprises a workpiece positioning device comprising a workpiece holder pivot unit as well as a tool positioning device comprising a tool holder pivot unit. The workpiece holder pivot unit is designed such that a workpiece holder is pivotable about at least three and no more than four workpiece holder pivot axes. Moreover, the tool holder pivot unit is designed such that a tool holder is pivotable about no more than two tool holder pivot axes. The machining installation has a simple design and ensures flexible and accurate machining of workpieces.

Abstract: A tool-support apparatus for attachment to a grinding machine, in particular to a wet grinding machine, which has at least one grinding disc arranged on a rotatably drivable grinding-disc shaft and a machine frame or housing in which the grinding-disc shaft is supported. The tool-support apparatus has a tool-support, which can be secured on a machine frame or housing of the grinding machine, for the support during the grinding process of a tool that is to be ground, and an arresting apparatus for securing the tool support on the machine frame or housing. The tool-support can be secured on the machine frame or housing in such a way that it can be swivelled about the grinding-disc shaft or about a swivel axis parallel to the grinding-disc shaft and can be arrested by way of the arresting apparatus in a plurality of angular positions.

Abstract: A sand blaster is provided that includes an engine carried by an engine mounting plate. A frame is included and an engine support isolator engages the frame and carries the engine mounting plate. The engine support isolator has a stud that extends through a first coil and a stud guide that has a tapered inner surface. The stud extends through the stud guide. In other arrangements an air regulator that is adjustable is provided, and a nozzle that features reduced wear is provided.

Abstract: A grinding machine with 5-axis for cutters is disclosed, the grinding machine includes a grinding machine base (12) with an circular upper horizontal surface and a pillar (56) provided on one side of the grinding machine base, the pillar is curved with a radian of 180° along a side edge of the base, a groove body (63) on the circular base is enclosed by a curved vertical plate on the another side edge, and the height of vertical plate is lower than that of the pillar.

Abstract: A manipulator includes a controlling seat, a robot arm assembly and a polishing mechanism. The robot arm assembly is rotatably connected to the controlling seat; and the polishing mechanism is mounted on the robot arm assembly. The polishing mechanism includes a housing with a first mounting portion and a second mounting portion, a pair of magnetic valves mounted in the housing and electrically connected to the controlling seat, a first polishing assembly partially received in the first mounting portion, and a second polishing assembly partially received in the second mounting portion. The first polishing assembly and the second polishing assembly define an angle therebetween and are respectively connected to the pair of magnetic valves, such that the pair of magnetic valves controls the first and the second polishing assembly respectively to polish one or more workpiece. The present invention further discloses a polishing mechanism of the manipulator.

Abstract: A polishing device includes a movable base, a polishing head fixed on the movable base and a flatness detecting unit fixed on the movable base. The polishing head polishes a surface of a workpiece under driving of the movable base to achieve complete flatness. The flatness detecting unit moves along with the polishing head, for detecting the flatness of the surface of the workpiece polished by the polishing head.

Abstract: A portable and transportable die cavity modifying machine having a base carrying a carriage adjustable along one axis, e.g., a generally horizontal axis, and a machining head adjustable along another axis, e.g., a generally vertical axis, for modifying a die cavity of a stamping die in a manner that prevents blank or slug pulling during stamping press operation. The machine includes a grinder that can be pneumatically powered having a grinding bit used to precisely machine a slug retention groove in a die cavity defining surface (sidewall) of a die cavity formed in a stamping die. The machine has an angularly adjustable head carrying the grinder enabling adjustment of the angle of the groove relative to die cavity defining surface enabling the groove to be angled relative to the direction of a punch entering the die cavity during stamping.

Abstract: A polishing mechanism includes a support base, a pair of magnetic valves, a first polishing assembly and a second polishing assembly. The pair of magnetic valves are mounted in the support base. The first polishing assembly and the second polishing assembly are mounted on the support base and connected to the pair of magnetic valves respectively. The second polishing assembly is arranged perpendicular to the first polishing assembly. The first and the second polishing assemblies are respectively controlled by the pair of magnetic valves to polish one or more workpieces. The present disclosure further discloses a manipulator using the polishing mechanism.

Abstract: An enclosed polishing apparatus include a housing, a fixing seat, a guiding mechanism, and a chain-driven polishing mechanism. The housing includes a bottom housing and a top housing connected to the bottom housing. The fixing seat is securely placed in the bottom housing. The guiding mechanism is placed in the top housing above the fixing seat. The polishing mechanism is movably mounted on the guiding mechanism above the fixing seat. The polishing mechanism is driven and guided by the guiding mechanism to follow a desired polishing contour on a workpiece.

Abstract: The invention concerns a polishing arrangement (1) with a tool holder (3), at which a polishing tool is arranged and that interacts with a workpiece holder (5), the workpiece holder (5) and the tool holder (3) being movable in relation to one another in a first direction and in a second direction differing from the first direction. It is endeavored to make at least a part of the polishing process reproducible and documentable. For this purpose, in a third direction (20) that is perpendicular to the first (9) and second (10, 12) directions, the tool holder (3) is made to be flexible.

Abstract: A hand-held surface preparation apparatus comprising a frame, a hollow semi-circular shaped housing member connected to said frame, a drive housing connected to said housing member, a motor secured to said drive housing aligned directly over said hollow semi-circular shaped housing member, a roller rotatably positioned inside of the semi-circular shaped housing member in communication with said motor, front and rear guide handles extending from said frame, and removably connected front and rear debris guards.

Abstract: The invention relates to a device (1) for the insertion, guidance and evacuation of cylindrical parts to be ground in a centreless grinder (10). According to the invention, micrometric means (4, 40, 41) for adjustment of the alignment of the guides at the entry (3) to and the exit (5) from the guide chute (2) are provided and these micrometric adjustment means are independent from each other. The invention enables very precise adjustment of the alignment and prevents any shift of the parts.

Abstract: Methods, apparatus, and systems for polishing a substrate are provided. The invention includes an upper platen; a torque/strain measurement instrument coupled to the upper platen; and a lower platen coupled to the torque/strain measurement instrument and adapted to drive the upper platen to rotate through the torque/strain measurement instrument. In other embodiments, the invention includes an upper carriage; a side force measurement instrument coupled to the upper carriage; and a lower carriage coupled to the side force measurement instrument and adapted to support a polishing head. Numerous additional aspects are disclosed.

Abstract: A polishing device includes a reducer, a polishing mechanism, a rotatably driven mechanism, and a sliding driving mechanism. The polishing mechanism is connected to the reducer. The rotatably driven mechanism includes a first driving member and a transmission shaft, the first driving member includes a first main body and an output shaft rotatably connected to first main body, the transmission shaft is fixed to the output shaft. Sliding driving mechanism includes a second driving member, the second driving member includes a second main body and a driving shaft collar connected to the second main body, the second main body is fixed to the first main body. The second main body and driving shaft collar cooperatively define a through hole. The transmission shaft extends through the through hole and is connected to the reducer to enable the polishing mechanism to polish a workpiece. The driving shaft is fixed to the reducer.

Abstract: A device is provided that includes at least one motor part having a housing surrounding an electric motor for driving an active head part accommodating a tool such as a tool for grinding, sanding or the like, and a suction pipe intended to be connected to a suction device. The suction pipe leads to the housing of the motor part and the motor comprises a sealed high-frequency electric motor positioned in the central part of said housing in such a way that the sucked-in air circulates around the body of the motor.

Abstract: An outrigger grinding fixture to support a workpiece on a manual surface grinder having a worktable and a grinding wheel. The outrigger grinding fixture comprises a base member maintained on the worktable. A slide member has a V-shaped slot formed on an upper edge. A mechanism is for horizontally adjusting the slide member on the base member. Another mechanism is for preventing vibration of the workpiece when the grinding wheel engages with the workpiece.

Abstract: A power tool packing apparatus provides a packing force to form a compact coupling between an application tool and an output shaft of a power tool. The packing apparatus comprises a pressing disk, a crank set, a movable wheel and a plurality of steel balls. The movable wheel and the pressing disk form a space between them to hold the steel balls. The crank set has a plurality of pins butting the steel balls. The pressing disk has a force applying surface butted by the steel balls in regular conditions so that the pressing disk provides a packing force butted outward in the regular conditions. The movable wheel has retraction notches. When the movable wheel is turned, the steel balls slide into the retraction notches to provide the pressing disk an inward retraction space, thereby the packing force is released and the application tool can be disassembled quickly.

Abstract: This is directed to systems, processes, machines, and other means that allow a pan/tilt gun mount to be radio controlled by a plurality of frequencies. The invention can rapidly rotate and adjust elevation to aim a gun mount as directed by a user.

Abstract: A hand-held surface preparation apparatus comprising a frame, a hollow semi-circular shaped housing member connected to said frame, a drive housing connected to said housing member, a motor secured to said drive housing aligned directly over said hollow semi-circular shaped housing member, a roller rotatably positioned inside of the semi-circular shaped housing member in communication with said motor, front and rear guide handles extending from said frame, and removably connected front and rear debris guards.

Abstract: The invention relates to a grinding head for a grinding machine. The grinding head comprises a tool holder, which in use is moved in a plane, in particular rotated or translated back and forth, by the grinding machine. The grinding head furthermore comprises at least two tools which are connectable to the tool holder by a releasable sticking connection. One of the tools or the tool holder is provided with at least one protrusion and the other one is provided with an associated cavity to lock which extend transverse to said plane of movement of the tool with respect to the tool holder in a direction parallel to said plane when the tool is connected to the tool holder.

Abstract: A hand held, portable drill bit sharpener is provided which may be powered by a standard commercially available electrical power tool. The power tool may be used to actuate the drill bit sharpener by arranging the drive shaft of the sharpener into the power tool chuck. This drive shaft is connected through a gear set to a biased rotating sharpening stone which is pressed against a drill bit tip. The drill bit may be held in the sharpener using a standard keyless drill bit chuck.

Abstract: A supporting device (1) is described for supporting and containing an abrasive element (5) for the machining of stone, ceramic or similar, said supporting device (1) comprising an elastic means (6) for absorbing the external stress on said abrasive element (5); said supporting device (1) comprises an upper half-box (3b) and a lower half-box (3a) which comprise reciprocal engagement means (7), thus forming a housing box (3) able to accommodate said elastic means (6) and able to retain said abrasive element (5), said reciprocal engagement means (7) being suitable for permitting the sliding of said upper half-box (3b) towards and away from said lower half-box (3a). An abrasive tool (2) is also described for machining stone or similar, comprising an abrasive element (5) and a supporting device (1) for supporting and containing said abrasive element (5).

Abstract: An auto-scraping apparatus for a work piece of a hard rail has a driving device, a linking device and a tool device. The driving device has a connecting frame, a driving motor and a cam. The driving motor is mounted in the connecting frame. The cam is mounted on a bottom of the connecting frame and has an abutting face. The linking device is connecting to the driving device and has a main frame, an upper connecting arm, a lower connecting arm, a linking arm and a rotating wheel. The main frame is connected to the driving motor. The connecting arms are pivotally connected to the main frame and the linking arm. The rotating wheel is rotatably mounted on the upper connecting arm and abuts the abutting face of the cam. The tool device is connected to the linking device and has a tool carrier and a relieving tool.

Abstract: A polishing apparatus is provided for polishing an optical fiber connector. The optical fiber connector includes a connector housing and a ferrule. The polishing apparatus includes a mount to receive and hold the optical connector and a polisher housing supported by a base. The polisher housing houses a polisher that comprises a platen that supports a polishing media, the platen being coupled to a planetary gear system. The mount is disposed on a cover that encloses the polisher housing when the cover is placed in a closed position. A rotatable knob is exposed at an opening of the base, the rotatable knob being engaged with the planetary gear system to move the planetary gear system. The polishing media is disposed proximate to a fiber tip extending from an end face of the ferrule of the optical connector disposed in the mount when the cover is placed in the closed position.

Abstract: The invention relates to a tool-support apparatus for attachment to a grinding machine (1), in particular to a wet grinding machine, which has at least one grinding disc (3) arranged on a rotatably drivable grinding-disc shaft (2) and a machine frame or housing (4) in which the grinding-disc shaft (2) is supported. The tool-support apparatus has a tool-support (5, 6, 7), which can be secured on a machine frame or housing (4) of the grinding machine (1), for the support during the grinding process of a tool that is to be ground, and an arresting apparatus (8) for securing the tool support (5, 6, 7) on the machine frame or housing (4). The invention is distinguished in that the tool-support (5, 6, 7) can be secured on the machine frame or housing (4) in such a way that it can be swivelled about the grinding-disc shaft (2) or about a swivel axis (10) parallel to the grinding-disc shaft (2) and can be arrested by way of the arresting apparatus (8) in a plurality of angular positions.

Abstract: A planarization apparatus and method that thins and planarizes a substrate by grinding and polishing the rear surface of the substrate with high throughput, and that fabricates a semiconductor substrate with reduced adhered contaminants. A planarization apparatus that houses various mechanism elements in semiconductor substrate loading/unloading stage chamber, a rear-surface polishing stage chamber, and a rear-surface grinding stage chamber. The throughput time of the rear-surface polishing stage that simultaneously polishes two substrates is typically about double the throughput time of the rear-surface grinding stage that grinds one substrate.

Abstract: Optical grade surfacing tool, including: a rigid support (60); an elastically compressible interface (12) attached to the rigid support (60); a flexible pad (13) adapted to be pressed against a surface (71) to be worked, attached to the interface (12) on the opposite side to the rigid support (60); and return spring elements (14) disposed between the rigid support (60) and a peripheral part (12b) of the interface (12); characterized in that the return spring elements (14) include a plurality of pairs of superposed elastically flexible blades (65, 66) that project transversely from the rigid support (60), respectively a first blade (65) having a distal portion cooperating in bearing engagement, through a first face, exclusively with the peripheral part (12b) of the interface (12), and a second blade (66) cooperating in bearing engagement with the first blade (65) via a second face opposite its first face.

Abstract: An optical-grade surfacing tool includes: a rigid holder (60); an elastically compressible interface (12) secured to the rigid holder (60); and a flexible pad (13) that can be applied against a surface to be machined (71) and secured to the interface (12) opposite the rigid holder (60). The pad (13) is carried by an elastically extensible membrane (14) including: a central plate (15); and a plurality of straps (18) each radially protruding from the periphery of the plate (15) and each having a distal portion engaged with a fastening element (38), each strap (18) rotating about the side surface (28) of the interface (12) and extending up to the fastening element, each strap (18) being taut.

Abstract: A system and method providing improved capability for inspecting and repairing threads of bolts and threaded holes is disclosed. Polishing stones comprised of epoxy and metallic oxide are used in conjunction with dye to identify threads in need of repair and make them visible to a maintenance worker.

Abstract: The invention relates to a gear cutting machine for the grinding of external profiles and/or internal profiles of workpieces having at least one machining head which can be rotated about an axis and which has a grinding tool, and having a dressing unit. In accordance with the invention, the dressing unit is supported in the region of the pivot axis of the machining head such that it is pivotable about the common pivot axis together with the machining head and such that it can be moved along the pivot axis toward the grinding tool to be dressed.

Abstract: A device for polishing wheels of truck or cars without removing the valve or the tire of the wheel. The device comprises three parts: a rotative assembly fixed to a stand subject to an angular movement and housed upon a pendulum in extension. The rotative assembly includes a motor connected to a primary speed reducer 10:1 linked to a second speed reducer 60:1 fixed to a jaw turning at an average speed of 3 rpm, on which a wheel is positioned. The device is auto lubricating when a relative orientation of one reducer with respect to the other at 15° allows to maintain oil level in a critical reducer to prevent friction of mobile part inside the critical reducer. The pendulum possesses a pair of wheels to permit the displacement of the assembly on the ground while an actuator located on the pendulum causes the angular movement of the stand.

Abstract: An abrasive article having an array of abrasive members with an elastomeric support that permits each abrasive member to move independently in at least pitch and roll. Each abrasive member maintains a fluid bearing (air is the typical fluid) with the substrate. The abrasive members are capable of selectively engaging with nanometer-scale and/or micrometer-scale height variations and micrometer-scale and/or millimeter-scale wavelengths of waviness, on the surfaces of substrates. The spacing and pitch of the abrasive members can be adjusted to follow the topography of the substrate to remove a generally uniform layer of material; to engage with the peaks on the substrate to remove target wavelengths of waviness; and/or to remove debris and contamination from the surface of the substrate.

Abstract: A saw includes a base, a table supported above the base and configured to support a workpiece, an arm coupled to and extending above the base, and a saw unit supported by the arm so that the saw unit is disposed above the table. A first rail is fixedly coupled to the base and extends in a longitudinal direction, and a first bearing member is coupled to the table. The first bearing member moves along the first rail so that the table is moveable relative to the base in the longitudinal direction between a cantilevered position and an uncantilevered position, without any movement of the table relative to the first bearing member. The first bearing member is directly in contact with the first rail in both the cantilevered and uncantilevered positions.

Abstract: The invention concerns a polishing arrangement (1) with a tool holder (3), at which a polishing tool is arranged and that interacts with a workpiece holder (5), the workpiece holder (5) and the tool holder (3) being movable in relation to one another in a first direction and in a second direction differing from the first direction. It is endeavoured to make at least a part of the polishing process reproducible and documentable. For this purpose, in a third direction (20) that is perpendicular to the first (9) and second (10, 12) directions, the tool holder (3) is made to be flexible.

Abstract: To provide an abrasive disc which has a small size in the thickness direction and, therefore, can grind objects easily even if they are narrow portions or side walls of grooves and which has a strength enough for resisting the force applied during grinding. Means for Solution An abrasive disc which comprises a disc-shaped laminate comprising a layer of a nonwoven abrasive material, a layer of a reinforcing fabric connected to one side of the layer of the nonwoven abrasive material, a central opening, an almost flat front surface and an almost flat back surface; and a grinder-mounting resin portion, the grinder-mounting resin portion being formed integrally with the disc-shaped laminate by insert-molding a resin at the peripheral portion of the central opening in the disc-shaped laminate.

Abstract: It is intended to produce a high-quality purified surface-treated granular substance and processed substance through, without application of excessive pressure or temperature, efficient grinding of a surface layer region of feedstock granular substance by means of simple apparatus and operation to thereby remove unwanted portions, such as surface nonedible portion, oxidizing coating layer and attachment, without denaturation, decomposition or elimination or useful matter. Feedstock granular substance (7) is fed into cylindrical retention tube (3) provided with a multiplicity of retention parts (8) for retaining of granular substance (7) moving along the inner circumference thereof.