Abstract: A self-compensating hydrostatic (pressurized fluid film) linear bearing that maintains a fluid gap between a carriage and a rail when relative forces are applied. The geometric shape of the rail and mating carriage enable the bearing to have very high stiffness and load capacity without exessive detrimental carriage deformation. The carriages contain bearing grooves and lands which control and use fluid pressure to provide a very high degree of restoring force in response to changes in the fluid gap. The fluid emanating from the bearing gap is prevented from immediately leaking from the bearing carriage, and is instead routed back to the source from which it is pumped, thereby sealing the bearing carriage and simplifying the handling of the lubricating fluid. The hydrostatic bearing is particularly designed to be compact and to be bolt-for-bolt compatible with conventional linear bearings.

Abstract: A sliding structure is provided with at least a first sliding member that has a sliding surface and a plurality of micro-recessed parts with bottom surfaces having a maximum depth point spaced from the sliding surface to define a plurality of recesses. Each bottom surfaces includes a concaved portion extending rearward with respect to a sliding direction from the maximum depth point. Each micro-recessed parts has a cross-sectional shape in the sliding direction has an S/L ratio of 0 to 0.3, where L is an overall length of the micro-recessed part with respect to the sliding surface in the sliding direction and S is a length from a forward edge of the micro-recessed part with respect to the sliding surface in the sliding direction to the maximum depth point. The sliding member slide with respect to another sliding member with a viscous fluid interposed therebetween.

Abstract: A self-compensating hydrostatic (pressurized fluid film) linear bearing that maintains a fluid gap between a carriage and a rail when relative forces are applied. The geometric shape of the rail and mating carriage enable the bearing to have very high stiffness and load capacity without exessive detrimental carriage deformation. The carriages contain bearing grooves and lands which control and use fluid pressure to provide a very high degree of restoring force in response to changes in the fluid gap. The fluid emanating from the bearing gap is prevented from immediately leaking from the bearing carriage, and is instead routed back to the source from which it is pumped, thereby sealing the bearing carriage and simplifying the handling of the lubricating fluid. The hydrostatic bearing is particularly designed to be compact and to be bolt-for-bolt compatible with conventional linear bearings.

Abstract: A linear motion guide system is disclosed in which a clearance between a slider and a guide rail is closed truly to clear foreign matter away from entering inside the system through any end of the slider traveling on the guide rail. Thus, the linear motion guide system is befitting to severe working environment where much foreign matter occurs. A highly-tight sealing unit is comprised of a cassette constituted with a front panel and an enclosure, sealing plates stowed into the cassette, lubrication plates each interposed between any two adjacent sealing plates, and a rear panel to close-an open edge of the enclosure. The sealing plates are each composed of an intermediate spongy medium flanked by skin layers and impregnated with lubricant. The lubrication plates have pores filled with lubricant.

Abstract: A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between the rolling element groove and the shaft; separators interposed among the balls; and a circulating path formed in the linear motion body and for circulating the balls from one end side of the rolling element groove to the other end side thereof; wherein the linear motion device is charged with grease containing base oil which is 220-395 in worked penetration defined by JIS K2220 and 50-500 mm2/s in kinematic viscosity at 40° C.

Abstract: A sliding device is comprised of a first sliding member which is rotatable on an axis of the first sliding member, a second sliding member which slidably supports the first member through viscous fluid and at least a pit which is formed on a surface of at least one of the first and second sliding members so as to promote a viscous fluid flow, which has a component of a rotational direction of the shaft when the first member is rotated.

Abstract: The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.

Abstract: A multi-layer sliding part is prepared by a process including mixing 1–50 parts by volume of a Cu-plated solid lubricant powder with 100 parts by volume of a Cu-based alloy powder comprising 5–20 mass % of Sn and a remainder of Cu to form a mixed powder, sintering the mixed powder in a reducing atmosphere to form a sintered mass, pulverizing the sintered mass to form a powder, dispersing the powder formed by pulverizing on a metal backing plate, and sintering the dispersed powder to bond grains of the dispersed powder to each other and to the backing plate. After sintering of the pulverized powder to form bearing metal layer, the bearing metal layer is pressed and densified. After densification, the bearing metal layer is annealed, again pressed, and then coated with a resin having good sliding properties.

Abstract: A linear motion guide unit is disclosed which makes it possible to a long-lasting steady application of lubricant and also makes sure of preventing effectively occurrence of particles of dirt. The linear motion guide unit is comprised of a guide member, more than one rolling element, and a slider supported for linear movement along the guide track rail by virtue of rolling elements, the slider being made therein with a fore-and-aft hole in which a sleeve fits to allow the rolling elements to roll through there. The sleeve is made of a cellular member impregnated with lubricant in vacuum atmosphere.

Abstract: A sliding guide apparatus guides a movable member for a base. A pair of guide surfaces are formed on the base. A pair of sliding surfaces are formed on the movable member as so to be opposed to the pair of guide surfaces, respectively. Lubricating oil is supplied between the guide surface and the sliding surface. The sliding surface is configured so that one half portion of the sliding surface which is close to the center of gravity of the movable member is asymmetric with the other half portion of the sliding surface which is far from the center of gravity of the movable member. Since a load of the movable member that acts disproportionately on the sliding surface is balanced with dynamic pressure of the lubricating oil that occurs between the guide surface and the sliding surface, it is prevented that the movable member is slanted.

Abstract: A grease composition is produced by mixing a thickener comprising a fluoro resin and a second thickener component (a metallic soap, a complex metallic soap, an N-substituted terephthalamic acid metal salt, organic bentonite or a calcium sulfonate complex) into a base oil. This grease composition is excellent in heat resistance, load carring capacity, water resistance, rust protection, lubricating life and the like. A rolling apparatus filled with the above grease composition has excellent lubricating ability and is long-lived under high-temperature conditions. Moreover, a grease composition is produced by mixing a thickener comprising a fluoro resin and carbon black as a second thickener component into a base oil. This grease composition is excellent in heat resistance, water resistance, rust protection, lubricating life, electric conductivity and the like. A rolling apparatus filled with the above grease composition has excellent electric conductivity and is long-lived under high-temperature conditions.

Abstract: A multi-layer sliding part is prepared by a process including mixing 1–50 parts by volume of a Cu-plated solid lubricant powder with 100 parts by volume of a Cu-based alloy powder comprising 5–20 mass % of Sn and a remainder of Cu to form a mixed powder, sintering the mixed powder in a reducing atmosphere to form a sintered mass, pulverizing the sintered mass to form a powder, dispersing the powder formed by pulverizing on a steel backing plate, and sintering the dispersed powder to bond grains of the dispersed powder to each other and to the backing plate.

Abstract: According to the invention, a self contained vibration resistant bearing is provided. The bearing is coated with a film formed from a rust preventive oil having an extreme-pressure additive content of 0.5 to 10% by weight. Desirably the extreme-pressure additive is an organometallic compound, an organofatty acid compound, organofatty acid derivative, an organophosphoric acid compound or a combination of two(2) or more of such compounds. When a rust preventive film that contains an extreme-pressure additive is formed all over bearing components during the assembling process, the bearing components are fully protected even from sudden vibrations from transportation.

Abstract: A composite anti-friction bearing structure comprising a bearing substrate and an anti-friction layer. The bearing structure can be in the form of bushings, wear plates, wear rings, etc. The anti-friction layer includes particles of an alloy which combines lubricity of molybdenum with the wear resistance and corrosion resistance of elements such as cobalt and nickel. The invention is particularly related to anti-friction bushings for use in die sets, presses and other heavy duty machinery.

Abstract: A sliding guide apparatus guides a movable member for a base. A pair of guide surfaces are formed on the base. A pair of sliding surfaces are formed on the movable member as so to be opposed to the pair of guide surfaces, respectively. Lubricating oil is supplied between the guide surface and the sliding surface. The sliding surface is configured so that one half portion of the sliding surface which is close to the center of gravity of the movable member is asymmetric with the other half portion of the sliding surface which is far from the center of gravity of the movable member. Since a load of the movable member that acts disproportionately on the sliding surface is balanced with dynamic pressure of the lubricating oil that occurs between the guide surface and the sliding surface, it is prevented that the movable member is slanted.

Abstract: The present invention relates to a circulating apparatus for a linear guideway, and more particularly to the component of the unloading circulating portion of a rolling module of linear motion, the circulating apparatus is J-shaped, an end of which is disposed in the through holes, and end of which is connected to the loading path of the sliding block, the circulating apparatus is provided with a circulating path for enabling the rolling elements to move endlessly and circularly, in the circulating path are arranged two opposite grooves, the circulating apparatus comprises an outer circulating half tube and an inner circulating half tube which are connected together along the two opposite grooves.

Abstract: A bearing arrangement is provided with an area to be supplied with lubricant from a lubricant reservoir via a lubricant line. The lubricant reservoir has a number of individual reservoirs in which a portioned amount of lubricant is contained with closure to the lubricant line. A mechanism is provided for allowing the closure to the lubricant line to be optionally cleared.

Abstract: A low-friction sliding mechanism includes first and second sliding members having respective sliding surfaces slidable relative to each other and a lubricant applied to the sliding surfaces of the first and second sliding members. At least the sliding surface of the first sliding member is made of a diamond-like carbon material, and at least the sliding surface of the second sliding member is made of either an aluminum-based alloy material, a magnesium-based alloy material or a diamond-like carbon material. The lubricant contains a base oil and at least one of an ashless fatty-ester friction modifier and an ashless aliphatic-amine friction modifier.

Abstract: A novel linear guide plain bearing has a guide rail with rail-grooves formed respectively in opposite side surfaces thereof, and a slider with slider-ridges formed respectively on opposed inner side surfaces thereof. The slider is mounted in a straddling manner on the guide rail for sliding movement therealong. Each of the guide-grooves has a Gothic arch cross-sectional shape while each of the slider-ridges has a circular arch cross-sectional shape. The slider slides relative to the guide rail in an axial line contact condition. A solid lubricant-containing resin coating is formed on each of the slider-ridges, whereby the sliding resistance and sliding noise can be reduced more efficiently.

Abstract: A slide member which is excellent in the initial running-in property and can provide an excellent sliding property even under a strict sliding condition and, in particular, a slide member with a solid lubrication coating film which is excellent not only in the friction property but also in the wear resistance under the fluid lubrication, boundary lubrication and dry lubrication conditions. The slide member includes a solid lubrication coating film on a flat-plate-shaped base member, characterized in that, in the surface of the slide member, there are formed a plurality of concentrical grooves extending in the peripheral direction of the slide member surface, and, between the mutually adjoining ones of the grooves, there are formed ridge portions respectively.

Abstract: There is provided a durable low-torque lubricating oil for bearings and fluid dynamic bearings, porous oil-impregnated bearings and hydrodynamic type porous oil-impregnated bearings suitable for use as bearings in small-sized spindle motors for information equipment. The lubricating oil composition comprising (A) a diester of a monovalent aliphatic alcohol containing 6-10 carbon atoms and a saturated aliphatic dicarboxylic acid containing 10 carbon atoms as base oil and (B) 3-20% by weight of a low-viscosity lubricating oil with a kinematic viscosity of less than 11 mm2/s at 40° C., a fluid dynamic pressure bearing unit or a porous oil-impregnated bearing unit containing said lubricating oil composition or a spindle motor provided with said bearing unit.

Abstract: A ring-like lubricant supply device 6 is fitted into a recess 4 of a nut member 2. The lubricant supply device 6 contains a lubricant and is formed in an outer peripheral surface with notches 7. Tubular members 8 each having an outer diameter larger than the diameter of the notch 7 are inserted into the notches, pushing and widening the notches 7 in a circumferential direction. One end of the tubular member 8 is fitted into a recess 9b of a retaining ring 9 and the retaining ring 9 is fixed to a nut member 2.

Abstract: A lubricating system includes a flexible, nominally planar lubricating structure including first and second end regions and a central region positioned therebetween. The lubricating structure is impregnated with a lubricating fluid and is adapted for securement to a printhead carriage only at said first and second end regions.

Abstract: In a linear rolling bearing element comprising a carrier body that is mounted through rolling elements for sliding on the running surface (5) of a guide rail (4), and, for forming a rolling element circuit, said bearing element further comprising a load-bearing zone and a return channel which extend parallel to the direction of movement of the linear rolling bearing element, said load-bearing zone and said return channel being connected to each other through deflecting channels that are arranged on the carrier body in frontally adjoining head pieces (11) that contain lubricant ducts starting at a filling point of each head piece (11) and leading to the rolling elements, at least one lubricant duct for a rolling element circuit is divided into a supply duct (13) and an exit duct (14), which supply and exit ducts (13, 14) are connected to each other by a sealable lubricant pocket (12).

Abstract: A slider for a liner guide has an inverse U-shaped body, two side covers and a retainer. The body has ball channels to rotatably receive balls. The side covers are respectively attached to ends of the body and each has an oil channel communicating with the ball channels in the body. The retainer is attached between the side covers and to the bottom of the bridge of the body to keep the balls received in the ball channels near the bottom of the bridge from escaping from the corresponding ball channel. The retainer has a resilient hole, such that the retainer can be attached to and detached from the body in a sequential process. To assemble the slider is simplified and easy. In addition, the slider further has a parallel oil channel system to synchronously feed lubricant oil into the ball channels in the slider.

Abstract: A bearing arrangement is provided with an area to be supplied with lubricant from a lubricant reservoir via a lubricant line. The lubricant reservoir has a number of individual reservoirs in which a portioned amount of lubricant is contained with closure to the lubricant line. A mechanism is provided for allowing the closure to the lubricant line to be optionally cleared.

Abstract: In a linear guide apparatus including an axially extending guide rail, a slider engaged with the guide rail, and a plurality of rolling elements loaded into the slider, the linear guide apparatus further includes a sealing device fixed to the slider in slidable contact with the guide rail for sealing a clearance existing between the guide rail and the slider, in which the sealing device includes: a lubricant-containing polymer member formed of a synthetic resin containing a lubricant, and having a contact portion contacting with the guide rail to surround the guide rail, both wing portions, a connecting portion connecting the wing portions to be C-shaped substantially, and a pair of first recesses formed in the respective wing portions for fixing the lubricant-containing polymer member to the slider; a first plate member fitted to the lubricant-containing polymer member opposed to the slider; and a pair of first cylindrical members inserted to the respective first recesses.

Abstract: A slider for a liner guide has an inverse U-shaped body, two side covers and a retainer. The body has ball channels to rotatably receive balls. The side covers are respectively attached to ends of the body and each has an oil channel communicating with the ball channels in the body. The retainer is attached between the side covers and to the bottom of the bridge of the body to keep the balls received in the ball channels near the bottom of the bridge from escaping from the corresponding ball channel. The retainer has a resilient hole, such that the retainer can be attached to and detached from the body in a sequential process. To assemble the slider is simplified and easy. In addition, the slider further has a parallel oil channel system to synchronously feed lubricant oil into the ball channels in the slider.

Abstract: A MacPherson strut tube having an upper spring seat, a spring, a strut tube, and a ring bearing disposed for engaging the spring seat, the spring and the strut tube. The ring bearing comprises an upper casing, a lower casing, and a plastic ring engaged between the upper and lower casings, thereby forming said ring bearing.

Abstract: A ring-like lubricant supply device 6 is fitted into a recess 4 of a nut member 2. The lubricant supply device 6 contains a lubricant and is formed in an outer peripheral surface with notches 7. Tubular members 8 each having an outer diameter larger than the diameter of the notch 7 are inserted into the notches, pushing and widening the notches 7 in a circumferential direction. One end of the tubular member 8 is fitted into a recess 9b of a retaining ring 9 and the retaining ring 9 is fixed to a nut member 2.

Abstract: A linear rolling bearing element for mounting on a running surface of a guide rail, said element having a carrier body that comprises, for a rolling element circuit, a load-bearing zone and a return channel that are parallel to a direction of movement of the carrier body while being connected to each other by two deflecting channels disposed in head pieces that are arranged on ends of the carrier body. The head pieces comprise lubricant ducts, and a rolling element guiding means in the form of a plastic coating is arranged in the load-bearing zone, the return channel and the deflecting channels. Each head-piece is formed by a cage arranged on an end of the carrier body and by a one-piece sealing plate comprising lubricant ducts, said plate being adapted to and disposed on the cage.

Abstract: A lubricant supplying device for a guiding apparatus which can control as accurately as possible the amount per unit time of a lubricant to be supplied even when the amount per unit time of the lubricant to be supplied from lubricant accommodating chambers to lubricant coaters is very small, and stably can apply a predetermined amount of the lubricant to the rolling faces of a track shaft and/or a slide member from the lubricant coaters stably for a long period of time even when the feeder is made small in size. The lubricant stored in the lubricant accommodating chambers is lubricating grease which contains 0.05 to 4 wt % of a thickener in lubricating base oil.

Abstract: A linear motion unit (10) includes a runner that is arranged so as to be movable back and forth on a rod along the rod's axis (S), and at least one lubricating device (28) surrounding the rod at least partially. The lubricating device (28) includes at least one lubricating element (32) that stands in lubricating contact with the rod, and at least one lubricant reservoir (34) that is carried by the runner. In accordance with the invention, the lubricant reservoir (34) is arranged radially outside the lubricating element (32) with respect to the axis (S) of the rod.

Abstract: A drive system comprises a track table comprising a flat portion, perpendicular side portions extending in parallel to each other along both lateral side edges of the flat portion and at least one partition section formed to the flat portion at a portion between the perpendicular side portions so as to extend in parallel to thereto, the movable tables fitted into a space between one of the perpendicular side portions and the partition section, the movable tables each having lateral side surfaces to which loaded ball rolling surfaces constituting ball circulation passages are formed so as to correspond to the ball rolling surfaces of the track table, a number of balls disposed and arranged in the ball circulation passages so as to circulate therein in accordance with relative movement between the track table and movable table, and a driving unit for driving the track table and the movable table relatively.

Abstract: The present invention provides a rolling apparatus comprising a movable member which can undergo rotary or linear motion, a support member which carries the movable member, rolling elements which are interposed between the movable member and the support member and which roll with the movement of the movable member, and a lubricant composition which is disposed between the movable member on which the rolling elements roll and the support member, wherein the lubricant composition is a mixture of (1) a thickening agent which is at least one selected from the group consisting of a solid fluoropolymer, a lamellar mineral powder, an ultrafinely particulate organic material, an organic solid lubricant and an ultrafinely particulate inorganic material, and (2) a base oil comprising a liquid fluorinated polymer oil.

Abstract: In a curvilinear motion guide unit in which sliders are allowed to move along a track rail extending curved with a preselected curvature, this unit makes the slider reduced in size with well balance. An end cap may be made common in specification to a variety of sliders, which are modified in specification depending on diverse variations in curvature of track rail. To this end, a casing for the slider has forward and aft end faces that are arranged, regardless of the variations in length of the casing, such that imaginary planes including the end faces and normal to a top surface of the track rail coincide with radial planes extending through the center of curvature of the track rail. The return passages are opened on the forward and aft end faces at locations that are closer to the centroidal axis of the track rail than the loaded raceways. Moreover, the return passages are linear bores that run straight through the casing.

Abstract: A linear motion guiding apparatus comprises a guide rail provided with a ball running groove, and a movable block movably arranged along the guide rail through balls. The movable block is provided with a ball running counter-groove, a ball returning passage arranged away from the ball running counter-groove and direction changing passages for connecting these members. A resin-formed body for forming a ball circulation passage comprises a pair of ball passage forming portions, a returning passage forming portion and a pair of direction changing passage-inner guide forming portions. The resin-formed body is separately formed from a body of the movable block.

Abstract: A linear motion guide unit is disclosed in which a lubricant-impregnated plate is mounted on any one side thereof with a backing plate and accommodated in a cartridge. The lubricant-impregnated plate is less subject to deformation or distortion, thus continuing to keep precisely the sliding relation with the raceway grooves on the track rail. Lubricating means are arranged on end caps of the slider, one on each end cap. The lubricating means is composed of a lubricant-impregnated plate of sintered resinous component, a backing plate high in stiffness attached to the lubricant-impregnated plate into a composite plate, and a cartridge accommodating therein the composite plate. The backing plate and cartridge, in combination, sustain squeezing load caused when the lubricating means is fastened to the slider. Thus, the lubricant-impregnated plate is free from the squeezing load, keeping precise sliding-contact relation with the raceway grooves on the track rail.

Abstract: An air bearing slide assembly including a carriage having a plurality of planar slide faces containing integrally mounted porous carbon air bearings, the carriage being movable over a slide ram. The slide faces of the carriage being mated to opposing planar slide surfaces on the slide ram, wherein compressed air expelled from the air bearings creates a hydrostatic fluid film between the slide ram and the air bearings, thereby separating and supporting the carriage for longitudinal movement over the slide ram.

Abstract: A copper alloy sliding material which can bring about superior resistance to fatigue as well as good anti-seizure property without containing any Pb. The copper alloy sliding material is made to have the structure in which both of the hard copper alloy phase and the soft copper alloy phase coexist in a mixture state. On the surface of the sliding material, the soft copper alloy phase comes to have a shape more concave than that of the hard copper alloy phase when receiving a load or when being in a sliding wear relation, in which concave portions is retained lubricant with the result that the anti-seizure property is enhanced. Further, since the soft phase and the hard phase are made of the same copper alloy, the wettability thereof becomes good, and Ni and etc. contained in the hard copper alloy phase are diffused into the soft copper alloy phase, so that the hardness of the boundary portion defined between the phases come to be gradually varied.

Abstract: A lubricating coating compound used for forming a thermosetting synthetic resin lubricating film, wherein a resin composition composed of an epoxy resin, a curing agent, a reactive silicone oil with an epoxy group, and a triazinethiol is dissolved in an organic solvent, wherein if the sum of the epoxy resin and the curing agent is set to 100 parts by weight, the sum of the reactive silicone oil with an epoxy group and the triazinethiol is 2 to 30 parts by weight.

Abstract: A linear motion guide unit is disclosed wherein lubricant-containing members of sintered resinous components are fixed to core metals with either of mechanical means and adhesives whereby the lubricant-containing members may be kept in an accurate sliding contact with the raceway grooves on the track rail. Lubricating plate assemblies attached on end caps by bolts are each composed of the lubricant-containing member of sintered resinous component, core metal and dustproof cover. The lubricant-containing members are each fixed on the associated core metal with adhesives or with mechanical means such as claws, grasping fingers or the like, which are formed on the core metals. The core metals have rigidity sufficient to protect the lubricant-containing members from deformation, resulting in keeping the highly accurate sliding contact relation of the lubricant-containing members with the raceway grooves on the track rail.

Abstract: A ring-like lubricant supply device 6 is fitted into a recess 4 of a nut member 2. The lubricant supply device 6 contains a lubricant and is formed in an outer peripheral surface with notches 7. Tubular members 8 each having an outer diameter larger than the diameter of the notch 7 are inserted into the notches, pushing and widening the notches 7 in a circumferential direction. One end of the tubular member 8 is fitted into a recess 9b of a retaining ring 9 and the retaining ring 9 is fixed to a nut member 2.

Abstract: A self-lubricating bearing assembly for supporting a load on a guide rail which includes a carriage having first and second ends, a guide surface adapter for translation atop the guide rail and an end cap assembly which mounts adjacent one of the ends of the carriage. The end cap assembly includes a seal and a lubricating assembly having a lubricating block made from a lubricant composition and a compression housing for enclosing a periphery of the lubricating block and for biasing the lubricating block against the guide rail to cause the lubricant to contact the rail.

Abstract: Rolling bearings are proposed in which acoustic deterioration is suppressed which maintaining low dust, low torque and long life. Also, a grease for rolling bearings is proposed which is less likely to scatter under centrifugal force at high speed rotation, whereby preventing malfunction and noise of electronic information devices. A lubricating oil film of an ester-series oil having a dynamic viscosity at 40° C. of 35 mm2/s or over is formed on the friction surface of a rolling bearing. There is also provided a high-speed rolling bearing in which a lubricating grease having its worked penetration (JIS K2220) adjusted to 175-250 is retained therein. The grease is preferably prepared by adding a thickening agent containing 50 wt % or more of an aliphatic lithium salt 12-24 in carbon number to a base oil comprising 30 wt % or more of an ester oil having a dynamic viscosity at 40° C. of 10 mm2/s or over, and having its worked penetration (JIS K2220) adjusted to 175-250.

Abstract: A lubricant supplying unit preferable for a linear motion apparatus such as a linear guide unit and a ball screw unit, always capable of coating all rolling body rolling grooves formed on a track shaft with an equal amount of lubricant regardless of a difference in the mounting posture of the track shaft with respect to a fixing unit, is provided. A lubricant supplying system for achieving such an object comprises a casing fixed to the slide member, a plurality of coating pieces which are protruded from plural positions of the casing so that they are in contact with the track shaft for coating the track shaft with lubricant and a lubricant accommodating chamber provided in the casing for supplying lubricant to the coating piece, wherein the plurality of the coating pieces are divided to groups consisting of one or two or more adjacent coating pieces and the lubricant accommodating chambers is formed for each of the groups.

Abstract: A ball screw is provided which makes it easy to determine the degree of deterioration of lubricating grease so that new lubricating grease can be supplied efficiently without loss. The ball screw includes a threaded shaft formed with a thread groove in its outer peripheral surface, a nut formed with a thread groove in its inner peripheral surface, and a plurality of balls rollably retained in a circulating passage comprising a helical passage formed between these thread grooves when the nut is fitted on the threaded shaft, and a passage connecting both ends of the helical passage. The balls and the circulating passage are lubricated by a lubricating grease which has a brightness of 1 or over and in which a base oil having a viscosity at 100° C. of 3.0-7.5 mm2/s is thickened by a urea-family thickener.

Abstract: A guide member for a linear movement guide, which guide member is arranged on and can execute movements in longitudinal direction along a rail (1). Guide members (2) of this type are provided with at least one roll body circuit (6a-6d), wherein each roll body circuit comprises a return channel, a bearing zone (11), as well as two deflection channels (13) that connect the return channel (12) and the bearing zone (11). Each roll body circuit contains several roll bodies (7), wherein guide means are provided for guiding the roll bodies inside the roll body circuit. A roll body circuit of this type is intended to dispense with the feeding of lubricants. For this, the invention suggests that at least some of the guide means, at least in the region of the running surfaces for the roll bodies, be provided with a plastic material having at least two components. The first component is embedded in the form of particles in the second component.

Abstract: The life of a linear guide device which can be employed in an environment where high cleanness or oil free is required is prolonged by using a solid lubricating agent. In order to attain the object, in a linear guide device comprising a guide rail, and a movable unit consisting of: a movable block which is disposed with straddling the guide rail; and balls (rolling elements) which are enclosed in a ball circulation passage disposed in the movable block, at least ball raceway surfaces of the guide rail and the movable unit are coated with a solid lubricating agent, and the clearance between the guide rail and the movable unit is 0 or positive. Although a solid lubricating agent which is susceptible to be affected by a load is used, therefore, the life of the device can be prolonged as compared with the case where a negative clearance is employed.

Abstract: A linear motion unit (10) includes a runner that is arranged so as to be movable back and forth on a rod along the rod's axis (S), and at least one lubricating device (28) surrounding the rod at least partially. The lubricating device (28) includes at least one lubricating element (32) that stands in lubricating contact with the rod, and at least one lubricant reservoir (34) that is carried by the runner. In accordance with the invention, the lubricant reservoir (34) is arranged radially outside the lubricating element (32) with respect to the axis (S) of the rod.