Abstract: A linear motion bearing assembly comprising a ball retainer structure having at least a portion of a plurality of open axial ball tracks formed therein. The ball tracks include an open load bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. A plurality of load bearing plates are axially positioned adjacent the ball retainer structure for receiving load from the balls disposed in the load bearing portion of the ball tracks. A bearing plate to housing intermediary load structure comprises a plurality of pieces and defines at least two spaces in between the pieces. The bearing plate to housing intermediary load structure extends circumferentially around the ball retaining structure. An inner arc of the pieces have a radius of curvature corresponding to a radius of curvature of the ball retainer structure.

Abstract: Two kinds of side seals are assembled by a seal member, a holder plate, and a cover. A base of the seal member is formed in a symmetrical shape with respect to a center line of a thickness direction. The seal member includes recesses formed in both faces of the base in the thickness direction and fitted with a protrusion of the holder plate. A lip of the seal member is inclined in a direction from a first face toward a second face in the thickness direction.

Abstract: A guide rail that includes a base rail having a channel therein and at least one finger extending from a portion of the channel. The guide rail further includes a race insert mounted against the at least one finger. In an embodiment of the invention, the race insert has a first and second raceway associated with the at least one finger extending from a portion of the channel. Further, the first and second raceways have different load transmission directions, wherein the load transmission directions of both the first and second raceways are oblique to the direction that the at least one finger extends from a portion of the channel.

Abstract: A motion guide device has a moving block mounting surface 501 of an end plate 5 formed in a planar shape and a thinned-down portion 52 formed in an opposing moving block mounting surface 502. Moreover, in this motion guide device, a lubrication path 30 includes: a first lubrication path 30a formed extending in a horizontal direction from a surface of side surfaces parallel to a longer direction of a track rail 1 in the end plate 5 to a central portion of the end plate 5; a second lubrication path 30b formed in the central portion of the end plate 5; and a third lubrication path 30c connected to the second lubrication path and formed in a groove shape in the moving block mounting surface 501 of the end plate 5, and, moreover, the first lubrication path 30a is formed in a hollow shape continuous to inside a built-up portion 52a appended to the thinned-down portion 52 of the end plate 5.

Abstract: In a linear motion guide device suitably applicable to applications under high-temperature and vacuum environments where no plastic end cap is applicable, and having an end cap formed by injection molding using metal powders as a raw material, the degree of adhesion of the metal powders is improved at a thin and keen portion like the scooping portion of the end cap, thereby suppressing an abrasion and a deformation. The end cap (7) is formed by injection molding (MIM: Metal Injection Molding) using metal powders of equal to or less than 20 ?m as a raw material, and has a scooping portion (9) having undergone an HIP (Hot-Isostatic-Pressing) process and a thermal process.

Abstract: A circulation maintaining device for a linear slide assembly includes two top boards, four half mediate plates, two third half tubes, two bottom boards, and two end caps. Each of the above mentioned parts is manufactured integrally by way of injection molding and needs only one set of molds. These parts are connected to the slider symmetrically. Each of the half mediate tubes provides a second half tube and a half mediate plate. The second half tubes are inserted into the top holes and the bottom holes from two ends of the slider. The two half maintaining plates each have stops and recessed areas in longitudinal direction thereof so as to form restriction in transverse direction. The half maintaining plats each have ribs which are engaged with the grooves in the slider to provide positioning effect in a vertical direction.

Abstract: A recirculating bearing allows two-axis translational motion of a supported member along a bearing surface. The recirculating bearing combines a bearing surface upon which a plurality of ball bearings are free to roll in any direction along the bearing surface with a recirculating volume that recirculates ball bearings to and from the bearing surface. Unless limited by the application, the recirculating bearing provides for unlimited range of motion of the supported member in both axes.

Abstract: Linearly adjustable torque transmission systems and methods for a power driven machine are provided. The system can include a first wheel adapted to be rotatably driven. The system can further include a second wheel positioned proximate the first wheel that can engage the first wheel such that rotational movement of the first wheel can impart rotational movement to the second wheel. The second wheel can be coupled to a shaft with bearings between the second wheel and the shaft such that the second wheel is movable along the shaft in a lateral direction while the second wheel is coupled to the shaft wherein rotational movement of the second wheel rotationally moves the shaft.

Abstract: A linear guide unit, with a guide carriage arranged on a guide rail and rolling bodies which circulate in circulating channels. Each circulating channel has a load section, a return section and two deflection sections endlessly connecting the load section to the return section. The load section is delimited by running tracks for the rolling bodies, which are formed on the guide carriage and guide rail, and with lubricant channels which are formed on the guide carriage and are connected to the circulating channels. An end is connected to a transfer point to a further lubricant channel or the circulating channel. A seal with an annularly closed sealing section is provided between the end of the lubricant channel and the transfer point, and is designed as a valve which prevents the lubricant channel from running at no-load.

Abstract: A linear motion bearing assembly comprising a load bearing plate structure having at least a portion of a plurality of open axial ball tracks formed therein, each of said plurality of open axial ball tracks comprised of at least two concentric ball tracks. The ball tracks including an open load bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. At lease one load bearing plate is axially positioned adjacent said load bearing plate structure for receiving load from the balls disposed in the load bearing portion of the ball tracks. Various outer housing sleeves are disclosed including a structure split axially and a monolithic structure.

Abstract: The motion guide device includes: a raceway rail; a moving block including an endless circulation path for rolling elements; and spacers interposed in the endless circulation path of the moving block. The moving block includes: a block body including: a load rolling element path for the rolling elements; and a rolling element return path parallel to the load rolling element path; and turning path forming members fixed to the block body. The turning path forming member includes a direction turning path for coupling the load rolling element path and the rolling element return path to each other. The direction turning path includes: a turning portion for continuously varying a rolling direction of the rolling elements; and a preliminary turning portion which allows the spacers to move in a curved form while linearly guiding the rolling elements.

Abstract: A linear motion bearing assembly comprising a ball retainer structure having at least a portion of a plurality of open axial ball tracks formed therein. The ball tracks include an open load bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. A plurality of load bearing plates are axially positioned adjacent the ball retainer structure for receiving load from the balls disposed in the load bearing portion of the ball tracks. A bearing plate to housing intermediary load structure comprises a plurality of pieces and defines at least two spaces in between the pieces. The bearing plate to housing intermediary load structure extends circumferentially around the ball retaining structure. An inner arc of the pieces have a radius of curvature corresponding to a radius of curvature of the ball retainer structure.

Abstract: A linear motion bearing assembly comprising a ball retainer structure having at least a portion of a plurality of open axial ball tracks formed therein. The ball tracks including an open load-bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. At lease one load bearing plate is axially positioned adjacent said ball retainer structure for receiving load from the balls disposed in the load-bearing portion of the ball tracks. Various outer housing sleeves are disclosed including a structure split axially and a monolithic structure.

Abstract: A rolling device having high silencing effect and requiring no positional alignment working to the seal is provided. The rolling device includes an inner member, an outer member and a number of rolling members disposed between these inner and outer members to thereby allow the outer member to carry out relative rotational motion with respect to the inner member. In such rolling device, an end plate 24 is mounted to each end portion of the outer member. This end plate 24 is provided with an end plate body 24a, a packing member 24c disposed on an abutting surface to the outer member and a seal member 24b slidably contacting the inner member with substantially no clearance. The end plate body 24a, the packing member 24c and the seal member 24b are integrally formed.

Abstract: A linear motion bearing assembly comprising a ball retainer structure having at least a portion of a plurality of open axial ball tracks formed therein. The ball tracks including an open load bearing portion, an open return portion and turnarounds interconnecting the load bearing and return portions. A plurality of bearing balls are disposed in the ball tracks. A plurality of load bearing plates are axially positioned adjacent the ball retainer structure for receiving load from the balls disposed in the load bearing portion of the ball tracks. A first outer housing sleeve is effective to hold the ball retainer structure. The first outer housing sleeve includes a first interlock structure. A second outer housing sleeve is effective to hold the ball retainer structure, the second outer housing sleeve including a second interlock structure. The first interlock structure is effective to mate with the second interlock structure.

Abstract: A linear motion bearing assembly comprising a rolling element retainer structure and an outer housing sleeve enclosing substantially all of an exposed exterior surface of said rolling element retainer structure. A bearing block effective to enclose substantially all of an exposed exterior surface of the outer housing sleeve, the bearing block including a first bearing block segment effective to enclose a first part of the outer housing sleeve; and a second bearing block segment effective to enclose a second part of the outer housing sleeve, wherein the first bearing block segment and the second bearing block segment include first elements and second elements effective to interlock with each other when the bearing block encloses the outer housing sleeve.

Abstract: A linear sliding block having a rolling ball retainer includes a base block, two circulation-guiding blocks, a plurality of rolling balls and two retainers. The base block has a sliding groove corresponding to a linear sliding rail and at least a pair of load-bearing tracks at two sides of the sliding groove. The two circulation-guiding blocks are coupled to two ends of the base block. The rolling balls are received in load-bearing tracks and non-load tracks. Each retainer has a strip corresponding in position to the load-bearing tracks to hold the rolling balls. The strip has a pair of fixing pieces at two ends thereof. The fixing pieces at the two ends of the strip are connected to the circulation-guiding blocks at the two ends of the base block with fixing members.

Abstract: A motion device includes an orbital element, and a moving element into which the orbital element is inserted, the moving element guided so as to be able to reciprocate in a longitudinal direction of the orbital element, wherein at ends of the moving element, cylindrical protrusions into which the orbital element is inserted are formed and protrude in the longitudinal direction of the orbital element so as to be pivotally supportable on bearings, and total size around the orbital element in a direction perpendicular to the longitudinal direction of the protrusions is smaller than that of the moving element.

Abstract: A linear sliding block structure includes a base block, two circulation-guiding blocks coupled to two opposing ends of the base block and a plurality of rolling balls. The base block has a sliding groove, load-bearing tracks and non-load tracks. Each of the circulation-guiding blocks has a sliding passage and a circulation track to interconnect the load-bearing tracks and the non-load tracks. Each of the circulation-guiding blocks includes a first body and a second body. The first body includes a rigid component and a soft cover component. The soft cover component is formed with at least one stop portion disposed close to the first passage of the rigid component to be against the linear sliding rail.

Abstract: A linear motion device has a first assembly and a second assembly, at least one first rolling surface that extends in a longitudinal direction and provided on the first assembly, the first rolling surface being located opposite a second rolling surface which is provided on the second assembly, a row of rolling elements that circulate endlessly in the first assembly is located between the first and second rolling surfaces, and at least one central longitudinal section of the first rolling surface is designed such that the rolling elements are at least partially relieved of the load. The first rolling surface is provided on a separate first rolling surface part in the form of a profiled element having a substantially constant cross-sectional shape, the first rolling surface part is situated in a central longitudinal section at a distance from a first body of the first assembly, and is supported on the first body on both sides in the longitudinal direction next to the central longitudinal section.

Abstract: A supporting track element for use in a linear ball bearing, with at least one outer surface which is outwardly curved in one direction, at least in some regions, and at least one track which is opposite the outer surface and is intended for at least partially receiving load-bearing balls of a linear ball bearing. In addition, the supporting track element in cross-section has at least one material interruption which forms two adjacent cross-sectional regions. The adjacent cross-sectional regions touch at least in the region of the outer surface. As a result, the supporting track element is produced cost-effectively without significant limitations to the functionality thereof occurring. A method for producing a supporting track element is also proposed. Furthermore, a linear ball bearing is equipped with supporting track elements.

Abstract: A ball-screw spline includes: a screw shaft; a ball-screw nut engaged with the screw shaft via balls; and a spline nut assembled to an outside of the ball-screw nut via balls to reciprocate in an axial direction of the ball-screw nut. The ball-screw nut includes a screw portion and an extended portion formed integrally, with the same outer diameter. The screw portion has an inner peripheral surface including a load-rolling groove forming a load path for the balls together with a ball rolling groove on the screw shaft side; and a ball return path coupling adjacent valley portions of the load-rolling groove to form a circulation path corresponding to one loop around the screw shaft. The ball-screw nut has an outer peripheral surface including a ball rolling groove for the spline nut, the ball rolling groove being formed over a range corresponding to the screw portion and the extended portion.

Abstract: Provided is a thin slide unit which allows, in a case where two ball plates each formed with a track-like ball groove are combined to thereby construct an endless circulation path for balls, by merely directly connecting the two ball plates without using a guide plate, balls to smoothly circulate, and a slider to smoothly reciprocate with respect to a guide rail. An endless circulation path for the balls of the slider is formed such that the two ball plates each formed with the track-like ball groove are caused to face each other, and that the ball plates are directly connected. Peripheral sides of the two ball plates oppose to each other, to thereby form a load opening portion for causing the balls in the endless circulation path to contact a rolling groove of the guide rail, and form a scooping-up portion for raising the balls from the rolling groove to guide the balls into the endless circulation path.

Abstract: A linear ball bearing for longitudinally movable mounting of a shaft-like guide rail in a part surrounding the guide rail, which has a sleeve-like cage with recesses arranged one behind the other in the circumferential direction holding ball circuits which have at least one supporting section with supporting balls which are supported such that they can roll on the guide rail. The supporting balls are also supported such that they can roll on a raceway of a supporting race element inserted indirectly or directly into the cage. The supporting race element has at least one radial outer surface, arched outward at least in one direction, for contact against an inner surface of the part which surrounds the guide rail. The outer surface is formed by at least one web-like projection extending in the longitudinal direction of the supporting race element.

Abstract: A ball-spline with rotary mechanism is provided which is as small as possible in size, able to perform high-precision works on a small scale and also weighs less than ever, helping the downsizing of the component-placement systems. The ball-spline has a spline shaft, a slider movable along the spline shaft through balls, and bearings installed on the opposite ends of the slider for rotation relative to a machine bed. The holder has a pair of projections which extend through slots in the spacer parts and slots in the end-cap major body to fit into slots in a carriage. Fastening screws fit into threaded holes in the projections to fasten the holder to the opposite ends of the slider.

Abstract: A miniature linear motion guide unit is described in which a tubular member for a return passage is installed in an outward open recess cut in the carriage and a covering to bear the tubular member is integral with an end cap major part. This construction helps make the slider compact with cost saving in production. The slider is composed of a carriage made up of an upper portion and side bulges extending downward and having the outward open recesses, end caps having turnaround passages, the tubular members lying on outsides of the side bulges of the carriage, and coverings connected integrally with the end cap major parts to embrace the tubular members in combination with the outsides of the carriage.

Abstract: A connector plate makes it possible to join together carriages with high rigidity and much load rating no matter lengthwise dimensions of the carriages. The carriage has at leading and trailing ends thereof the connector plates identical in structure. The connector plate on a front surface thereof has a tenon or projection and a mortise which are spaced widthwise from each others. The adjoining carriages are joined together after the connector plates have been placed each other in a relation the their front surfaces have made direct engagement face-to-face with each other with the tenon having fit into the mortise to make the tenon-and-mortise joint.

Abstract: An actuator has a frame and a slider body which are both made of extruded shapes of light-metal alloy. A first rail member is fastened to the frame by means of a simple construction. An upper sealing member is placed between the frame and the slider body. With the actuator constructed as stated earlier, the frame is an elongated extrusion of U-shape in transverse section whose side walls have first recesses of dovetail configuration to fit over first rail members and flanges. A slider has therein the slider body having second recesses of rectangular shape to fit over second rail members. There is further provided a driving unit to force the slider with respect to the frame. The first rail members each have the wedged configuration including tapered contours and dents, while the second rail members each have the rectangular shape.

Abstract: A ball spline includes a connecting part of a cage of a spline nut has a turning ball receiving part adapted to receive balls which are turning from a no-load raceway part, and a turned ball receiving part adapted to receive the balls which are forwarded to a main passage after turning. An outer diameter of the turning ball receiving part is made larger than an outer diameter of the turned ball receiving part.

Abstract: A component for linear guideway and method for making the same, wherein the component is an end cap or a bolt cover which is made by bulk molding compound which is injected into a mold and formed into the desired shape by thermal setting. The component can be an assembly made up of a plurality of members, namely, an inserting member which is provided for passage of rolling elements can be formed simultaneously when the component is molded by plastic injection molding. The inserting member is formed by: injecting metal powder into a first mold and forming into an inserting member with acceptable rigidity and precision; putting the inserting member into a second mold and bulk molding compound; then the die material is formed into the desired component by thermal setting directly on the inserting member.

Abstract: A linear ball bearing with a substantially sleeve-like cage for receiving axial ball loops distributed across the circumference of the cage. Each ball loop has a first ball channel open radially to the inside and outside for the row of the carrying ball, and a second ball channel open radially towards the outside for the row of the non-carrying balls and has deflection channels connecting the ball channels of a ball loop to each other. At least the first ball channel is covered on the outside by a load-bearing carrier plate. Individual support surfaces on the carrier plates rest on predetermined support regions on the outer lateral surface of the cage. The carrier plates are positioned via interacting positioning projections in the predetermined positions on the cage. The carrier plates, which rest against the cage, are fixed to the cage via holding rings that are slid over the carrier plates.

Abstract: A linear motion device has a first assembly and a second assembly which is linearly movable relative to the first assembly, in which at least one first rolling surface which extends in a longitudinal direction is provided on the first assembly, the first rolling surface being located opposite a second rolling surface provided on the second assembly, and in which a row of rolling elements is located between the first and second rolling surfaces, and in which a return passage that is substantially parallel to the first rolling surface is provided in the first assembly, the return passage being connected at either end via a curved deflection passage to the first rolling surface such that rolling elements are transferred, thereby enabling the rolling elements to circulate endlessly, and in which the first assembly includes at least one deflection assembly that may be installed as a whole, and that includes a single deflection passage, and the return passage is provided directly and completely in a separate first

Abstract: The metallic mold 90 includes a product configuration portion 93 formed between an upper mold 91 and a lower mold 92. This product configuration portion 93 is composed so that a rolling element accommodating belt 50 formed by this product configuration portion 93 can include spacer portions interposed between balls adjacent to each other in an infinite circulating passage and also include connecting arm portions for connecting the spacer portions to each other and so that the balls can be aligned in the alignment direction in the infinite circulating passage. The upper mold 91 has a splitting structure. In this splitting structure, a splitting position BL is set at a position passing through a position 91t for forming an end portion on the outer circumferential side in the inner and outer circumferential direction of the infinite circulating passage of the spacer portions 51.

Abstract: The present invention provides a motion guide device having inner and outer direction changing passages that mutually cross three-dimensionally, in which a retainer is able to smoothly circulate even when an outer peripheral side of the inner direction changing passage as well as an outer peripheral side of the outer direction changing passage are formed on an end plate. An outer peripheral side (18) of the outer direction changing passage and an outer peripheral side (19) of the inner direction changing passage are so formed on an end plate (5) as to cross each other three-dimensionally. Built in the end plate (5) is an inner/outer direction changing passage component (24) formed to serve as not only an inner peripheral side (25) of the outer direction changing passage but also an outer peripheral side (26) of the inner direction changing passage together with the outer peripheral side (19) of the inner direction changing passage formed on the end plate (5).

Abstract: A guide rail includes a base rail with at least one finger extending from a first portion of the base rail, and at least one finger extending from a second portion of the base rail. A race insert is mounted against the fingers. A first race way is associated with the at least one finger extending from the first portion of the base rail. A second race way is associated with the at least one finger extending from the second portion of the base rail. The first and second race ways have different load transmission directions. The load transmission direction of the first race way is non-parallel to the at least one finger extending from the first portion of the base rail. The load transmission direction of the second race way is non-parallel to the at least one finger extending from the second portion of the base rail.

Abstract: A motion guide device that has a novel damping structure different from the conventional damping structure is provided. The present invention comprises a raceway member (1) having a rolling-element rolling part (1a); a moving member (2) having a loaded rolling-element rolling part (2a) facing the rolling-element rolling part (1a) and being allowed to make a linear or curved movement relatively to the raceway member (1); and a plurality of rolling elements (3) intervening between the rolling-element rolling part (1a) of the raceway member (1) and the loaded rolling-element rolling part (2a) of the moving part (2). A gap (16) between the raceway member (1) and the moving member (2) is filled with a layer of oil contacting the raceway member (1) and the moving member (2). Viscosity resistance of the oil is utilized to apply a braking force to the moving member (2) or the raceway member (1) in proportion to a speed.

Abstract: A self-lubricating mechanism of slide member, including a slide assembly and a lubricating section. The slide assembly has a linear guide section, a slider linearly slidably mounted on the guide section and reciprocally movable between a first position and a second position and at least one rolling section positioned in a space defined between the slider and the guide section. The lubricating section has a main body fixedly disposed on one side of the slider. The main body is formed with an internal oil reservoir and at least one passage in communication with the oil reservoir. The passage has an opening formed on a first side of the main body in communication with the space. A push body is retractably disposed on the main body. A stopper body is fixed in a position adjacent to the first position for retracting the push body to drive the oil into the space.

Abstract: A linear motion rolling guide unit, which has underside seals prevented from falling off a slider, comprises a slider having a pair of end caps secured at ends of a casing, and underside seals provided between the pair of end caps having engaging projections. Insertion holes are formed in the underside seals and engaged with the engaging projections to secure the underside seals to the slider. Fallout-inhibiting protrusions are provided at ends of each underside seal in the longitudinal direction. The slider has holding portions each having a hole or a recess into which each of the fallout-inhibiting protrusions is inserted when the underside seal is secured to the slider. A gap is maintained between the holding portion having the hole or the recess and the outer periphery of the fallout-inhibiting protrusion.

Abstract: A preload biased structure of a linear rail includes a rail and a sliding block disposed on the rail. The sliding block includes a sliding base, a supporting element, two connecting pieces and two locking pieces. The sliding element is provided with a connecting space. The front and rear end of the sliding base each is provided with abutting pieces. The abutting piece extends to form a biased block toward the connecting space. The biased block extends to form a biased slope. In assembling, the biased slope guides the supporting element to be inserted in the connecting space. The biased block provides a preloading force, whereby the supporting element can be fixed in the sliding base in advance. The locking pieces lock the two connecting pieces on both ends of the sliding base, so that the supporting element and the two connecting pieces can be assembled on the sliding base.

Abstract: A rolling element retainer chain provides a row of rolling elements smooth running in a recirculation passage and keeps a predetermined spacing distance between two adjacent rolling elements and the rolling elements be separated without contact to each other; the rolling element retainer chain comprises at least one thin flexible metal strip having a row of longitudinal arranged holes; a row of cross arranged latten between holes are formed thereof; and a number of spacers, incorporated on the cross arranged latten; the strength of the flexible metal strip is much higher than that of the resin materials conventionally used and can endure higher tension without broken, and thus a longer operating duration can therefore be achieved; both ends on the flexible metal strip can be overlapped wholly fixed without interference because of thinner thickness thereof, and a close loop rolling element retainer chain is formed thereof.

Abstract: An actuator has a hollow track rail 6 having a slit 8 extending in an axial direction thereof, a movable block 7 disposed inside the track rail 6 to be movable along the track rail, and a ball screw mechanism for moving the movable block 7 along the axial direction of the track rail 6. The track rail has, in a section perpendicular to the axial direction of the track rail, a guide portion 9 for guiding movement of the movable member 7 and an extension 11 extending from the guide portion 9 so as to cover the movable member, and a width W1 of the slit 8 of the track rail formed between the opposed extensions 11 is narrower than a width W2 of the movable member. Accordingly, the actuator can provide a high rigidity in spite of compact outer dimension.

Abstract: A slide apparatus for a vehicle includes first and second rails and a rolling element circulation unit including first and second cases and a plurality of rolling elements accommodated within a receiving portion that includes first and second annular receiving portions accommodating the rolling elements annularly arranged in a rolling and circulating manner. The second case includes elongated bores connected to the first and second annular receiving portions in a state where the second case is mounted at the second rail. A portion of the rolling elements is exposed from the elongated bores while being inhibited from disengaging from the elongated bores. The rolling elements exposed from the elongated bores make contact with an operating surface of the first rail and inner surfaces of the first and second annular receiving portions, and roll and circulate in association with a relative movement between the first and second rails.

Abstract: A ball-spline with rotary mechanism is provided which is as small as possible in size, able to perform high-precision works on a small scale and also weighs less than ever, helping the downsizing of the component-placement systems. The ball-spline has a spline shaft, a slider movable along the spline shaft through balls, and bearings installed on the opposite ends of the slider for rotation relative to a machine bed. The holder has a pair of projections which extend through slots in the spacer parts and slots in the end-cap major body to fit into slots in a carriage. Fastening screws fit into threaded holes in the projections to fasten the holder to the opposite ends of the slider.

Abstract: In a slider of a linear motion guide unit, a carriage in the slider is cut away at undersides thereof to form concaves in which tubular members defining return passages therein are placed. This is in favor of reduced machining cost. The slider is composed of the carriage having an upper portion and side bulges, end caps secured on ends of the carriage, and tubular members installed closely outside the bulges of the carriage in the sliding direction. Sidewise underparts of the carriage is cut away to provide the concaves into which the tubular members fit with tube ends being kept in spigots which communicate with turnaround passages in the end caps.

Abstract: Provided is a ball spline device, in which an outer diameter of a nut member can be downsized to the maximum while sufficiently performing an original function, and which can keep reliability while being capable of being simply manufactured at lower cost without involving time and effort in assembly, in which a nut member has a track groove which is formed on an inner peripheral surface facing a spline shaft, the balls circulating in the track groove, the track groove comprises: a linear load groove formed so as to face the ball rolling groove of the spline shaft; a linear non-load groove provided parallel to the linear load groove; and a pair of ball deflection grooves for communicably coupling the linear load groove and the linear non-load groove with each other so as to allow the balls to intercommunicate therebetween, and the ball deflection grooves forcibly change an advancing direction of the balls rolling in the ball rolling groove and cause the balls to depart from the ball rolling groove with use of

Abstract: A vehicle slide device is provided, which can adjustably move the second rail along the first rail without play therebetween in a front-rearward direction with a long adjustment stroke. In the vehicle slide device according to the invention, since a plurality of rolling elements annularly arranged in the attaching portion formed at the second rail are always in contact with the operating surface of the attaching portion and the operating surface of the first rail when the second rail moves relative to the first rail in a front-rearward directions, the play of the second rail relative to the first rail in up-down and right-left directions can be eliminated. Further, since the plurality of rolling elements roll and circulate at the attaching portion, the second rail can smoothly move in a front-rearward direction along the first rail.

Abstract: In order to omit jostling caused between the adjacent rolling elements, a clearance is formed therebetween in a load region. A transfer path has a region that allows the rolling elements to contact only one of the transfer grooves of the transfer path, or a region that has a friction force acting between one of the transfer grooves of the transfer path and the rolling elements being greater than the friction force acting between another one of the transfer grooves of the transfer path and the rolling elements. The one of the transfer grooves in the region has a cross sectional shape taken in a direction perpendicular to the direction, in which the rolling elements are transferred, which cross sectional shape allowing two point contact with the rolling elements; and the rolling apparatus further has a contact-angle changing path that has a contact angle with the rolling elements that is greater than the contact angle of the other portion of the transfer path.

Abstract: A motion transmission apparatus with a chain, wherein the chain comprises a plurality of spacers and links for connecting the spacers together, each of the spacers is provided at both sides thereof in an axial direction of an elongated shaft with a plurality of holding protrusions and inclined at an angle from a center of each of the spacers toward a peripheral edge thereof in such a manner that a distance between outer ends of two opposite holding surfaces on two neighboring spacers is smaller than a diameter of the rolling elements, the holding protrusions of the chain are annularly arranged in 120 degree intervals in such a manner that the holding protrusions on the same side of each spacer are alternatively arranged in a direction which is vertical to the links, and two of the holding protrusions are arranged in a line parallel to a direction of the links.

Abstract: A guide rail and method of forming a guide rail is provided. The guide rail includes a base rail having a groove with a plurality of fingers formed therein and a race insert mounted in the groove. The race insert has at least two different load directions. The fingers extend generally non-parallel to the different load directions. The fingers are preferably deformed into a state of bending.

Abstract: A rolling guiding device makes it possible to easily provide a movement block with an endless circulation path for the balls. In one surface of a movement block opposed to a rolling groove of a raceway rail, there is formed a track groove through which balls makes an endless circulation. The track groove is includes a load straight-line groove which allows, between the track groove and the rolling groove of the raceway rail, the balls to roll while bearing a load. It also includes a pair of ball deflection grooves respectively provided at both ends of the load straight-line groove and adapted to release the balls having rolled through the straight-line groove from the load and to change their rolling direction, and a non-load straight-line groove for transferring the ball in a non-load state from one deflection groove to the other ball deflection groove.