Abstract: A drum assembly for a ball mill system may comprise: a drum having a first flange extending axially forward from a first radial wall, a second flange extending axially aft from a second radial wall, and a cylinder shell extending axially from a first radially outer end of the first radial wall to a second radially outer end of the second radial wall; a frame coupled to the first flange; and an inlet liner coupled to the frame, the inlet liner comprising a plurality of inlet segments disposed circumferentially adjacent to each other, the inlet liner defining an inlet radius for the drum assembly.

Abstract: In one example, an ambulatory medical device is provided. The ambulatory medical device includes a plurality of subsystems, at least one sensor configured to acquire data descriptive of a patient, a user interface and at least one processor coupled to the at least one sensor and the user interface. The at least one processor is configured to identify subsystem status information descriptive of an operational status of each subsystem of the plurality of subsystems and to provide a device health report for the ambulatory medical device via the user interface, the device health report being based on the operational status of each subsystem.

Abstract: A meshed shell and a sandblasting method are provided. The meshed shell includes a first end portion, a second end portion opposite to the first end portion, a first annular portion, a second annular portion connected to the first annular portion, a first mesh portion between the first end portion and the first annular portion and a second mesh portion between the second end portion and the second annular portion. The weights of the first end portion and the second end portion are the same. A maximum inner diameter of the mesh of the first and second mesh portions is smaller than a penetration size of the component. Both of the sum of the weights of the first and second end portions and the sum of the weights of the first and second annular portions are greater than the sum of the weights of the first and second mesh portions.

Abstract: The present invention provides a drum for a shot blasting apparatus that uniformly treats the works to be treated by increasing the level of agitation of the works that are buried at the bottom of the drum, and, further, suppressing the traces of collisions on the works, which traces are caused by the works colliding with each other. The drum comprises a hollow middle part, a lower-half part having the shape of a truncated cone, having a closed bottom, and having a projecting part for agitating that is connected to both the lower-half part and the middle part, and that agitates the works, wherein the projecting part for agitating has at least two surfaces, one being the surface for picking-up the works and the other being the surface for having the works slide down. The present invention also provides the shot blasting apparatus using the drum.

Abstract: A golf ball kit having an abrasive material adapted for imparting enhanced micro surface roughness to an exterior surface of a golf ball. The enhanced micro surface roughening affects the aerodynamic properties of the ball as compared to golf balls having the same set of construction specifications but without enhanced micro surface roughness. The kit includes an instruction device having a plurality of correlations between at least one performance parameter and micro surface roughness for at least a first golf ball.

Abstract: A deburring device includes a barrel with a granulated polishing member filled therein. The barrel is configured by a case formed with an opening hole, and drop prevention member which is fixed to the case and prevents the polishing member from being dropped from the opening hole. A gap into which a tubular end section of a workpiece is inserted is formed between the opening hole of the case and the drop prevention member.

Abstract: The present disclosure relates to a method for disassembling a flat display device including a panel that includes a pair of glass substrates each having display materials formed on a surface thereof, the glass substrates being arranged so as to face each other. In the disassembling method, rotation body (10) which has recesses and projections (10a) inside thereof and rotates at a non-constant speed is used. The panel is disassembled so as to be separated into glass substrates (1a) and (1b) to thereby expose the display materials, glass substrates (1a) and (1b) each having the display materials formed on the surface thereof are then put into rotation body (10), and rotation body (10) is then rotated to perform a process for removing the display materials from the surface of each of glass substrates (1a) and (1b).

Abstract: A machine for the flow finishing of mechanical pieces is described. The machine has a rotary vat for containing finishing media and a unit for moving pieces having at least one mechanical arm for moving the pieces being machined, said mechanical arm being associated to means for rotating the pieces within the rotary vat, the rotary vat has at least two separate sections formed by concentric circular crowns.

Abstract: A machine for the flow finishing of mechanical pieces is described. The machine has a rotary vat for containing finishing media and a unit for moving pieces having at least one mechanical arm for moving the pieces being machined, said mechanical arm being associated to means for rotating the pieces within the rotary vat, the rotary vat has at least two separate sections formed by concentric circular crowns.

Abstract: A golf ball kit having an abrasive material adapted for imparting enhanced micro surface roughness to an exterior surface of a golf ball. The enhanced micro surface roughening affects the aerodynamic properties of the ball as compared to golf balls having the same set of construction specifications but without enhanced micro surface roughness. The kit includes an instruction device having a plurality of correlations between at least one performance parameter and micro surface roughness for at least a first golf ball.

Abstract: An apparatus and method for abrading the surface of objects are disclosed. The apparatus comprises a chamber, an abrasive surface defining a wall of said chamber and drive means for moving the abrasive surface relative to the chamber. In use, the aforementioned relative movement promotes circulation of the objects within the chamber, wherein the chamber is shaped such that regions of flow stagnation of the objects within the chamber are avoided or minimized. Additionally or alternatively, the chamber may be shaped to approximate the peripheral flow path of the objects within the chamber.

Abstract: Vibratory tumblers for processing workpieces and methods for manufacturing such vibratory tumblers are disclosed herein. In one embodiment, a vibratory tumbler includes a base, a support member movably coupled to the base, a bowl configured for removable attachment to the support member, and a motor attached to the support member for moving the bowl relative to the base. The bowl is sized and configured such that the support member and at least one-fourth of the base can be received within the bowl while the support member is coupled to the base.

Abstract: A fluid barrel-polishing device comprises a cylindrical fixed tank (1) and a turntable (2) that is located at the bottom of the tank (1) with a gap (3) that allows it to rotate horizontally, and wherein when workpieces and media are thrown in the fixed tank (1) and the turntable (2) is rotated horizontally, the workpieces and the media circulate and form themselves into a mass (M) and thereby the workpieces are polished, wherein an inner cylinder (4) is rotatably or fixedly placed coaxially on the center of the rotation of the turntable (2) and it allows the workpieces in the mass (M) to be polished with the inside of the mass (M) contacting the wall of the inner cylinder (4) and with its outside contacting the wall of the fixed tank (1).

Abstract: A rotational processor comprises an outer vessel and a plurality of inner vessels having an outer traction surface adapted for rolling contact with an inner surface of the outer vessel. A plurality of drive rollers drive the inner vessels about a center line of the outer vessel in rolling contact with the outer vessel. Each of the drive rollers contacts each of a pair of adjacently located inner vessels when the inner vessels are not being driven about the outer vessel. The outer traction surfaces compress in response to centrifugal forces applied by the rolling contact with the outer vessel such that each of the drive rollers separates from one of the adjacently located pair of the inner vessels.

Abstract: Barrel polishing is effected while causing a mass (M) consisting of work and media (polishing material) to rotation-flow by rotating a rotary disk installed in the bottom of a polishing tank by a drive motor. A load on the drive motor for the rotary disk is preset as by a load current value, and the flow of the mass (M) in the polishing tank is controlled, thereby effecting polishing while maintaining the load on the drive motor within the preset range.

Abstract: A dry surface treating apparatus of the present invention comprises, within a treating chamber, a surface-treating material supply section and a tubular barrel having a porous peripheral surface for accommodating a work piece, to treat a surface of the work piece while rotating the tubular barrel horizontally arranged about a horizontal rotational axis, wherein the tubular barrel has a slide stop for stopping a slide of the accommodated work piece along an inner peripheral surface of the tubular barrel due to rotation of the tubular barrel. According to the dry surface treating apparatus of the invention, because the work piece is inverted of surfaces within the tubular barrel, the time the work piece at each surface faces the surface-treating material supply section is made equivalent. Consequently, it is possible to provide even deposited-film formation or surface treatment to the opposite surfaces of a work piece, particularly, a rare earth metal-based permanent magnet in a plate or bow form.

Abstract: A fixture for holding tools to be processed in a rotational processing apparatus. The fixture includes at least one mounting rod with a plurality of spacers slidably disposed on the mounting rod. A plurality of tools are disposed about the rod, each tool being spaced from an adjacent tool by one of the spacers. A removable attachment is provided on at least one end of the rod for inhibiting the spacers from sliding off the rod. The fixture may also include first and second end plates mounted to the rod on either side of the products being finished. One or more springs may also me incorporated onto the rod between a spacer and the first or second end plates. A process for loading and using the fixture is also disclosed.

Abstract: To improve the grinding action when grinding workpieces in a device equipped with a container and a rotary disk rotating relative thereto using abrasive granules, according to the invention there are ribs in the upper area of the container.

Abstract: The invention provides a grinding machine for grinding grinding material by means of grinding bodies or wheels, having at least one grinding unit and two parts rotatable relative thereto, which has a container for receiving grinding material and a rotary disk placed above a container base, accompanied by the formation of a finite gap.

Abstract: This invention relates to a vibrating abrasive cleaning apparatus and method which is powered by at least one electric motor specially fabricated to the cleaning container assembly mounted on a rigid square tubing frame on one side by compression springs, on the opposite side by tension springs. The compression springs and tension springs have a different spring rate which produces better rolling of the media and therefore, faster circulation and cleaning. The specially fabricated electric motor attached to the cleaning container provides for enhanced oscillation and much greater cleaning capabilities thereby reducing the cleaning time. The entire vibrating assembly sits on a base and has a lid operated by a cable and counterweight for ease in loading the container for oscillation of the parts.

Abstract: To improve the grinding action when grinding workpieces in a device equipped with a container and a rotary disk rotating relative thereto using abrasive granules, according to the invention there are ribs in the upper area of the container.

Abstract: A holder for semiconductor wafers in an apparatus for chemical-mechanical polishing of semiconductor wafers, having a disk-shaped head, a holding plate and a ring-shaped membrane attached to the carrier section and the holding plate which defines a pressure chamber between these components, the bores in the holding plate being connected with the pressure chamber, a contact membrane of elastomeric gas-impermeable material having a peripheral edge which is fixedly connected to a peripheral portion of the holding plate in a gas-tight manner and engages the lower side of the holding plate.

Abstract: A centrifugal barrel finishing apparatus centrifugally polishing, grinding or otherwise finishing workpieces includes a revolving member mounted on a first rotatable shaft so as to be rotated with the first shaft, a barrel mounted to be rotated about a second shaft, the barrel having both axial ends, a stopper mounted on the second shaft so as to be abutted against one axial end side of the barrel, and a fluid pressure cylinder including a piston and mounted on the second shaft so that the piston pushes the other axial end side of the barrel so that the barrel is held between the stopper and the cylinder.

Abstract: With the blasting apparatus in which the injection nozzle is disposed to inject the blast material against the work pieces from the outside of the tubular barrel formed of the mesh net for accommodation of the work pieces and rotatable about the center axis, the work pieces can be stirred homogenously and efficiently without excessive occurrence of the collision of the work pieces against one another and without occurrence of the collision of the work pieces against one another and with a strong shock force. Therefore, the treating efficiency is enhanced and, it is possible to inhibit the occurrence of the cracking and breaking of the work pieces. Further, with the blasting apparatus in which the tubular barrel is supported circumferentially outside the center axis of the support member rotatable about the center axis, it is possible to more inhibit the occurrence of the cracking and breaking of the work pieces.

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 horizontal centrifugal finisher is disclosed for subjecting a product to centrifugal and rotational motion. The finisher includes a main frame which rotationally supports a central shaft about a horizontal longitudinal axis. At least two radial supports are mounted to and extend radially outward from the shaft. One or more containers are rotatably supported by the radial supports. Each container has two side walls, two end walls, a bottom and an open top. The walls and the bottom define an enclosure for containing products to be finished. A cover is attached to the container for closing off the open top. A drive system is incorporated into the finisher for rotating the containers. The drive system includes a primary drive system adapted to rotate the shaft about its horizontal axis, and a secondary drive system adapted to rotate the containers about their respective longitudinal axis.

Abstract: In a grinding machine comprising a stationary wall part and a plate part which rotates about an axis of rotation, between which a gap is formed, the gap is limited from above by a ceramic part and from below by an elastic part.

Abstract: A fixture for holding tools to be processed in a rotational processing apparatus. The fixture includes at least one mounting rod with a plurality of spacers slidably disposed on the mounting rod. A plurality of tools are disposed about the rod, each tool being spaced from an adjacent tool by one of the spacers. A removable attachment is provided on at least one end of the rod for inhibiting the spacers from sliding off the rod. The fixture may also include first and second end plates mounted to the rod on either side of the products being finished. One or more springs may also me incorporated onto the rod between a spacer and the first or second end plates. A process for loading and using the fixture is also disclosed.

Abstract: An apparatus is disclosed for performing high speed processing of a workpiece. The apparatus includes an outer vessel having an inner surface and a central axis. At least one intermediate vessel is located within the outer vessel and has an outer surface which contacts the inner surface of the outer vessel. At least one inner vessel is positioned within the intermediate vessel and adapted to receive an object to be subjected to a manufacturing process. The inner vessel is located at a position within the intermediate vessel such that the central axis of the inner vessel is spaced apart from the central axis of the outer vessel. A drive system controls the rolling of the intermediate vessel along the inner surface of the outer vessel. The rolling of the intermediate vessel causes the inner vessel to rotate about its axis and the axis of the outer vessel.

Abstract: This invention relates to a vibrating abrasive cleaning apparatus and method which is powered by a hydraulic drive motor mounted to a square tubing fame which is housed within an enclosure that is vibrated by an eccentric shaft assembly directly coupled to the hydraulic drive motor and square tubing frame. The container assembly is mounted on the rigid square tubing frame, on one side by compression springs, on the opposite side by tension springs. The compression springs and tension springs have a different spring rate which produces better rolling of the media and therefore, faster parts circulation and cleaning. To further give flexibility to the cleaning process the hydraulic power supply is equipped with the variable volume piston pump to give infinite speed settings.

Abstract: A process of dry polishing molded or lathe cut intraocular lenses or like medical devices to removing flash, sharp edges and/or surface irregularities therefrom. The process includes gas and/or rotational tumbling of the intraocular lenses or like medical devices in a dry polishing media. The process is suitable for single piece and multipiece intraocular lenses of varying composition.

Abstract: An apparatus is disclosed for performing high speed processing of a workpiece. The apparatus includes an outer vessel having an inner surface and a central axis. At least one intermediate vessel is located within the outer vessel and has an outer surface which contacts the inner surface of the outer vessel. At least one inner vessel is positioned within the intermediate vessel and adapted to receive an object to be subjected to a manufacturing process. The inner vessel is located at a position within the intermediate vessel such that the central axis of the inner vessel is spaced apart from the central axis of the outer vessel. A drive system controls the rolling of the intermediate vessel along the inner surface of the outer vessel. The rolling of the intermediate vessel causes the inner vessel to rotate about its axis and the axis of the outer vessel.

Abstract: A centrifugal barrel finishing apparatus centrifugally polishing, grinding or otherwise finishing workpieces includes a revolving member mounted on a first rotatable shaft so as to be rotated with the first shaft, a barrel mounted to be rotated about a second shaft, the barrel having both axial ends, a stopper mounted on the second shaft so as to be abutted against one axial end side of the barrel, and a fluid pressure cylinder including a piston and mounted on the second shaft so that the piston pushes the other axial end side of the barrel so that the barrel is held between the stopper and the cylinder.

Abstract: A spiral-flow barrel finishing machine having a cylindrical stationary barrel and a rotary barrel closed at the bottom thereof includes an escape layer or air layer provided between an inner side of a metallic wall of the stationary barrel and an outer side of a lining layer being formed thereon for allowing for outward thermal expansion of the lining layer. The escape layer is provided over a specific area between the inner side of the metallic wall of the stationary barrel and the outer side of the lining layer formed thereon.

Abstract: A ceramic electronic part producing method, in which when a ceramic electronic part having an internal electrode in a ceramic sintered body and having an external electrode connected to the internal electrode at an outside surface thereof is to be produced, a ceramic sintered body is obtained, and then subjected to dry-type barrel polishing, which does not use water, using a centrifugal barrel device in order to expose the internal electrode from an outside surface of the ceramic sintered body. The method is one in which the problem of deterioration of electrical properties, such as insulation resistance property, caused by entrance of moisture during polishing, seldom occurs and in which a large number of highly reliable ceramic electronic parts can be produced.

Abstract: A method and apparatus for finishing automotive wheels having a rotatable turret, a plurality of containers journaled on the turret capable of receiving media and capable of selective rotation independent of the turret, and fixtures in the containers that stably hold automotive wheels in said containers for selective reception of said media. The turrets rotate at speeds from 75 to 500 rpm's to produce sufficiently high forces on the wheels. The wheels are held in stable position by a fixture that comprises a plurality of plates fixed about the container shaft for stable engagement with the wheels. The plates may be attached with a flanged tube and angled at approximately 45 to 75 degrees from the plate. The invention also has means for reducing the pressure build up caused by the high rotational forces within the container.

Abstract: An object of this invention is to increase strength of the turret plate and to disclose new constitution of a cover portion, a grinding device is constituted of a rotate fly-wheel; a turret plate which is located face to face with the fly-wheel and rotates in synchronization with said fly-wheel, said turret plates being formed in a cross shape with a plurality of leg portions extending in a radial direction thereof; a plurality of grind tubs located rotatably or oscillatably between said fly-wheel and vicinities of front ends of said leg portions of said turret plate, each of which has an opening portion above thereof, a periphery portion of said opening portion in said grind tub provided on said leg portion at a position ending horizontally positioning above said leg portion at a horizontally extending position; a cover portion installable to said opening portion of said grind tub by sliding; a fix means provided between the cover portion and the grind tub; and a reinforcement means provided on the turret pl

Abstract: The invention is a centrifugal grinder. The grinder contains a rotary receptacle lower part and a stationary receptacle upper part, wherein the receptacle lower part and the receptacle upper part each have a ceramic part on opposing faces defining an opening into the grinder between the receptacle parts, and an adjustable straight gap which includes the opening provided between the ceramic parts extending radially relative to an axis of rotation of the rotary receptacle.

Abstract: In a method for ultrafine grinding of solid particulate material to mean particle sizes far below 1 micrometer and/or for mixing of powder and agglomerate material with mean particle sizes in the range of nanometers, the material to be ground and/or mixed and an grinding/mixing additive are filled into a cooled grinding chamber containing loose grinding media. By motion of the grinding media relative to adjacent media and to the walls of the grinding chamber the material is ground to the desired particle size and/or is finely mixed. Subsequently the additive is removed from said material. For the production of particle sizes in the range of nanometers and/or for mixing particles of this size range, the method comprises that grinding and/or mixing is carried out in a cooled atmosphere in the presence of a fine grained solidified additive which is chemically inert to said material, preferably water ice or solid carbon dioxide, at temperatures below their melting or sublimation temperature.

Abstract: A deburring, burnishing and polishing machine using a grinding or polishing medium rotating on an endless conveyor belt, especially for noble metals, with a service-friendly, at any time integratable collection device for the products to be polished and the polishing medium by means of a basket or a cage with holes, and with the inside of the machine being accessible at any time through a panshaped polishing trough, which on the one side is connected with the pipe frame and on the front sides exhibits a carrier profile for the storage of the conveyor rollers rotating on the backing side of the conveyor belt, whereby polishing dust or polishing solution is collected in a collection pan that can be pulled out below the polishing trough, and in the wet process the solution is transported by means of a rotating pump back into the polishing trough.

Abstract: A pepper seed polishing machine consists of a frame made from welded angle iron bars, a polishing mechanism which is a concave made from iron sieve having holes with diameter of 1.5-2 millimeters, and an agitator set. The agitator set consists of three backward curve vane blades welded onto a rotating shaft and is driven by a two-horsepower electric motor via a two V belt-pulley set. Black pepper seed is loaded into a hopper located on top of the machine. After polishing process, the polished seed is unloaded from the machine, while dust and rubbish can be collected separately. Polishing or rubbing off the outer skin of pepper seed resulted from rubbing action between seed to metal and seed to seed. The revolution of the rotor can be changed by changing pulleys' diameter. This results in changing of time required for each cycle of polishing process and polishing capacity as well. After polishing, the pepper seed has much more favorably odor than those polished by the conventional method.

Abstract: A vibrational magnetic polishing machine comprises a machine frame on which a workpiece container, an action device and a rotary alternating magnetic field generator are mounted such that the workpiece container is vibrated by the action device, thereby causing the workpiece and the polishing media to jump in the container. The polishing media arc induced by the alternating magnetic field to jump so as to smooth the surface of the workpiece.

Abstract: A tumbler apparatus for abrading and polishing small parts and rocks includes a cylindrical barrel with a closed end and an open end. The inner surface at the open end has a circular sealing edge. A sealing closure for the sealing the barrel at the open end includes a first and a second rigid disc. A resilient band, either an O-ring or a cylinder, is held between the discs. A translating mechanism draws the discs toward one another in a sealing mode, that compresses the band to bulge outwardly to sealingly engage the inner sealing surface of the barrel open end. In a releasing mode, the discs are moved apart, allowing the band to resume it original shape, thereby unsealing the barrel to facilitate removal of the closure for access to the barrel contents. A pressure relief valve at the center of the discs may be optionally provided.

Abstract: A finishing assembly for vibratory finishing of workpieces in loose finishing media includes at least one generally annular finishing chamber which is driven by a drive assembly and supported by a support housing. The drive assembly consists of a crank shaft and a drive shaft which are rigidly connected to each other through a wedge-shaped gasket and oriented such that the rotary axis of the crank shaft and the rotary axis of the drive shaft intersect with one another at a predetermined angle. The crank shaft rotates within a first bearing hub which is rigidly mounted within the chamber and the drive shaft rotates within a second bearing hub which is rigidly secured to the assembly housing and which is actuated by an electric motor. The spatial vibration of the finishing assembly can be adjusted using a wedge-shaped gasket and/or by providing for horizontal displacement of the first bearing hub from the second bearing hub.

Abstract: A system and method for polishing spherical shaped devices is disclosed. The system includes a carrier and an enclosure. The carrier has two projections so that when a device is placed between the projections, it contacts the carrier at two contact points. The enclosure matingly engages with the carrier so that it also contacts each device at two contact points. A movement system, such as a motor, provides relative movement between the carrier and the enclosure so that the four contact points polish each device. Also, the relative movement moves each device so that the device's entire outer surface is polished by the apparatus.

Abstract: On a conventional chassis (10) forming a rigid structure there is mounted an electromotor (12) whose rotary shaft is coupled to a reducer (13) whose output end (14) is secured via suitable means to a flat (23); on this chassis (10) there is a stationary cylinder (15) on whose lateral surface (15a) there are magnets (16-17); inside (15) there is tank (18) which rotates through the action of the shaft of the reducer (13), small flanges (30) being located on the end wall (18a) of (18), a support (25) with arms (24), from which iron chains (32) hang, being arranged on the threaded column (27), the machine being intended for the polishing and cleaning of nonmagnetic materials of the type used in jewelry, such as gold, silver, alloys thereof and the like.

Abstract: A shot blast machine for cleaning workpieces that includes two tumbler sections and at least one blast wheel for impelling abrasive particles. Both tumbler sections have a surface with an ingress and an egress for supporting and tumbling the workpieces under the path of abrasive particles. Though horizontally adjacent, the two surfaces are vertically displaced relative to each other. The vertical displacement of the surfaces forms a step to induce an additional tumble of the workpieces as they tumble from the egress of the first tumbler section to the ingress of the second tumbler section, thereby encouraging the shot blasting of every surface on the workpieces in a timely manner. The degree of tilt of the surfaces is selectively adjustable, thereby allowing substantial control over the duration of the cleaning cycle.

Abstract: A method for polishing articles comprising soft acrylic materials is disclosed. The method includes a cryogenic polishing step and a cleaning step. In the polishing step, a receptacle is charged with polishing beads of various sizes, sodium bicarbonate, a swelling agent and the articles to be polished, for a period of time and at a rotation speed sufficient to remove surface irregularities. Following the polishing step, a receptacle is charged with (a) a cleaning slurry comprising cleaning beads of various sizes and (i) sodium hydroxide and water or (ii) alumina, a surfactant and a solvent and (b) the articles to be cleaned, for a period of time and at a rotation speed sufficient to clean the surface of the polished articles. Agitation is preferably accomplished by a tumbling machine.

Abstract: Any part of an abrasive media in a solid particle or liquid form is prevented from entering a seal and/or the area where a rotary shaft bearing for a rotating barrel is sealed, thereby protecting the bearing and/or its seal against any possible damage that may be caused by abrasive media. A the barrel finishing operation performed by rotating a rotating barrel rotatably mounted inside a cylindrical stationary barrel on a lower portion thereof in a spaced relationship to the stationary barrel. The stationary barrel has an outer bottom plate at the bottom end thereof.

Abstract: A centrifugal finisher uses centrifugal and rotational forces for finishing at least one object. A fixed, non-rotatably outer vessel has an inner surface and a central axis. At least one inner vessel is positioned inside the outer vessel and is adapted to hold an object to be finished. The inner vessel has an outer surface. At least one intermediate roller is positioned between the inner surface of the outer vessel and the outer surface of the inner vessel and engages the surfaces of respective outer and inner vessels. A drive mechanism rotates the inner vessel around the central axis of the outer vessel, thereby causing rotation of the inner vessel by engagement of the inner vessel with the intermediate roller which moves by rotation along the inner surface of the outer vessel.