Abstract: A reciprocating device has a construction, in which a slider is formed by fixing a table member to a bearing casing which is movable inside a track bed having a C-shaped section in a longitudinal direction thereof, and a continuous drive is disposed along the track bed for reciprocating the slider. A weight and sizes of the device can be reduced, and reciprocating motion without a pitching motion can be achieved. Accordingly, the invention can prevent generation of uncomfortable noises during a movement of the slider, and also can prevent reduction of durability of the device which may be caused by irregular wear of a bearing for guiding the slider.

Abstract: A ball retainer to be used in a linear bearing of a ball bush, a ball spline or the like. The ball retainer is formed with endless ball guide races for guiding balls smoothly and can be easily assembled in a bearing outer cylinder. The ball retainer is constructed to comprise: a retainer body fitted in a hollow portion from one opening of the bearing outer cylinder which moves linearly around a bearing shaft; and an annular piece fitted in the hollow portion from the other opening. The ball retainer is characterized in that its outer shape is configured with the inner shape of the bearing outer cylinder when the annular piece is fixed on the leading end portion of the retainer body.

Abstract: The invention relates to a ball circulating unit (1) for a linear ball guidance device. The ball loops are formed by a multi-component cage (7). The cage (7) consists of groups of first and/or second inner segments (12) and (13). Head pieces (14) and webs (18) assist in guiding the balls (8) in the carrying portions (9) of the ball loops. The cage (7) is able to be produced by injection molding. The design of the inner segments (12, 13) permits variability in design and arrangement of the balls (8).

Abstract: A linear ball bush comprises a cage having a cage axis and a plurality of ball circuits, at least one ball circuit comprising two straight ball rows substantially parallel to the cage axis and two curved ball rows connecting the two straight ball rows, and a plurality of runner plates which each provide for the guidance of the ball circuit. The runner plates comprise straight track sections continued with substantially constant profile over their entire length, and between these a middle rib which is continued to each of the runner plate ends with substantially constant profile. The curved track sections connect the straight track sections and pass transversely through the middle rib.

Abstract: A rolling bearing for longitudinal movement has a cage with its inner surface surrounding a shaft. The cage has axially extending races for loaded balls and axially extending return races for unloaded balls, as well as a cover on each of its two ends. Each cover has turn around races connected between the ends of a race and a return race. The races, return races and turn around races have slits extending along the races and open to the shaft. Each turn around race in the covers is bounded by a curved shoulder section on the inner surface of the cage and extending along the turn around race, and a curved inner wall section of the cover extending parallel to the curved shoulder wall section of the cage.

Abstract: An apparatus for forming containers is disclosed having an improved guidance system for guiding a ram along a substantially linear path through a tool pack. The apparatus includes at least one bearing assembly through which the ram reciprocates. Preferably, the ram has a substantially circular cross-section.

Abstract: A linear motion guide assembly includes an elongated rail having a top surface formed with a pair of first inner guide grooves having a circular arc cross sectional shape and a pair of side surfaces, each of which is formed with a second inner guide groove having a Gothic arch cross sectional shape. A slider unit includes two first and two second endless circulating paths, each of which includes a load path section, a return path section and a pair of curved connecting path sections connecting the corresponding ends of the load and return path sections. Each of the two first endless circulating paths includes a first outer guide groove having a circular arc cross sectional shape located opposite to a corresponding one of the first inner guide grooves, and each of the two second endless circulating paths includes a second outer guide groove having a Gothic arch cross sectional shaped located opposite to a corresponding one of the second inner guide grooves.

Abstract: Apparatus for translating objects along a path is constructed in a manner which automatically conforms surfaces of a guideway with adjacent surfaces of a rail that extends along the guideway and thereby realizes very precise travel. A housing containing the guideway initially has a channel that is broader than the guideway. Plates are loosely disposed in the channel and strips of resilient material extend from the plates to the channel walls. The rail is emplaced between the plates and a cover plate is secured to the housing over the rail. This wedges the plates apart and compresses the resilient material while causing the top of the rail to be strictly parallel with the cover plate and while causing the plates to be strictly parallel with the rail side surfaces. Hardenable liquid adhesive is injected into the channel to unitize the plates with the housing.

Abstract: A linear motion bearing assembly is provided having a rail, a bearing carriage supported on the rail by rolling elements, the carriage having a pair of depending legs for movement along the rail and a pair of interlocking end cap/return track elements. The depending legs have load bearing grooves formed on an inner longitudinal surface and partial return tracks form on an outer longitudinal surface. The end cap/return track elements form a complimentary portion of the return track and have rolling element turnaround, formed therin to interconnect the load bearing and return tracks. The end cap/return track elements interlock to each other around the bearing carriage and are supported thereon by integral support structure. Sealing means are optionally provided for adverse operating conditions.

Abstract: A linear bearing assembly is provided including a housing for receiving a plurality of axial ball retainers and bearing plates therein. The housing includes a pair of end caps disposed in both longitudinal ends of the bearing assembly with the end caps having a plurality of angled ball turnarounds formed therein. The bearing plates and axial ball retainers form portions of a plurality of ball tracks with the bearing plates having grooves formed in an inner radial surface thereof for defining a top radial portion of the load bearing paths and circumference grooves defining side walls of the return paths. The bearing plates and axial ball retainers are arranged so as to allow optimization of ball track quantities to radial height of the overall bearing assembly and thus increase ball track quantities and load/life characteristics of the bearing assembly.

Abstract: The invention relates to a ball circulation unit in which ball rows are guided in a multi-component cage. The cage optionally consists of first inner segments and/or second inner segments, and is complemented by head pieces which comprise webs ensuring guidance of the balls in carrying portions of two adjoining ball rows. Designing the cage in this way makes it possible to produce it from plastics applying the injection molding process. The design of the inner segments permits variation regarding the design and arrangement of the ball rows.

Abstract: A linear motion ball bearing is disclosed for providing relative linear motion in combination with a shaft. A housing has an axially elongated opening therethrough and an axially elongated generally tubular shaped ball retainer is positioned within the housing opening and defines a plurality of endless ball loops therein extending generally in the axial direction of the retainer. The retainer has a radially inner surface and a radially outer surface and the ball loops are spaced generally circumferentially about the retainer. Each loop contains a plurality of balls and has a first ball duct for a row of loaded balls and a second ball duct for a row of unloaded balls.

Abstract: In a linear ball bush of part-annular form it is proposed that part-annular seals are secured against rotation about the cage axis by shape-locking engagement with a cage and are movable radially in relation to the cage axis over their substantially entire circumferential extent. Further it is proposed that longitudinal seal strips each comprise a root part received by a longitudinal groove of the cage and a tongue part resting on the shaft, these longitudinal sealing strips being provided with projections at their ends which rest under a longitudinal tension against an axially directed support shoulder of the cage.

Abstract: A linear unit for manipulation devices and comprising a housing part having a passage therethrough for receiving a spindle sleeve and a cylindrical bore longitudinally intersecting the passage and for receiving the two bearing elements that support the spindle sleeve for displacement in the passage, the cylindrical bore having a longitudinal axis at least partially lying in a plane in which the longitudinal edge of the spindle sleeve and the longitudinal axis of the spindle sleeve lie, and forming an acute feed angle with the longitudinal axis of the spindle sleeve.

Abstract: There is provided a rectilinear motion rolling guide unit comprising: a long track rail having an almost I-shaped cross section; a casing having an almost inverse U-shaped cross section; and rolling elements interposed between the track rail and the casing. The casing is arranged so as to ride over the track rail by a concave portion formed in the central lower portion of the casing. Upper and lower corner portions of both upper projecting portions of the track rail are chamfered to form inclined surfaces, thereby forming two upper and lower rail side track surfaces, respectively. Two upper and lower casing side track surfaces are formed on the inner peripheral surfaces of the concave portion of the casing at positions corresponding to the two upper and lower rail side track surfaces. A number of rolling elements are interposed between the corresponding track surfaces on the rail and casing sides, respectively, thereby allowing a relative slidable motion between the track rail and the casing.

Abstract: A linear ball bearing has a bearing proper in sliding engagement with a guide member through a plurality of balls. The bearing proper is made up of an intermediate member and a pair of end members each of which is provided on a respective end of the intermediate member. The intermediate member in turn is provided with at least one holding hole and a holding groove associated with each holding hole. The holding groove has a slit which is open to and extends along the surface of the intermediate member. Each of the end members has a transfer groove open between a respective holding hole and a respective holding groove. The holding hole, the holding groove and the transfer grooves collectively define a ball circulating passageway through which a plurality of balls are circulated.

Abstract: A shaft is supported to slide in a linear bearing which, in turn, is supported within a bore in a pillow block housing. To enable the bearing to self-align with a bearing in a paired pillow block housing, the bore of the housing is longitudinally crowned and permits the bearing to rock universally within a limited range while still maintaining rigidity and precise centerline accuracy.

Abstract: A linear ball bush, wherein at least one straight ball row of a ball circuit bears radially outwardly against a running plate, which is inserted in an associated aperture of a cage and possesses an outer face for bearing against an inner circumferential surface of a bearing housing bore seating the cage, is filled in the manner that the balls, with the running plate tilted at one end out of the aperture, are introduced via a filling slope at the open end of the aperture and/or a filling chamfer at the outwardly tilted end of the running plate into a straight portion of a track, and that after the balls of the ball circuit have been completed, the running plate is tilted back into an operating position and is secured in the operating position.

Abstract: The invention relates to a ball circulation bush having a longitudinal slot which, in its cross-section embraces an at least partially circular guiding rail. The balls of the circumferentially distributed ball rows are guided in a cage and, with their carrying portion, are arranged in a radial plane which is circumferentially offset relative to the radial plane of the balls in the returning portion. Furthermore, the balls in the returning portion are arranged on a larger diameter than those in the carrying portion. The cage is designed in several parts and includes indentically designed guiding parts and head pieces which are held relative to each other by stabilizing bars attached in bores and aligned in the solid bush via centering cams. In the regions which at the same time serves as the race for the balls in the carrying portion, the bush is designed to be thick-walled.

Abstract: An endless rolling contact linear motion guide assembly includes a rail extending straight over a predetermined length, a slider movably mounted on the rail and a plurality of rolling members for providing a rolling contact between the rail and the slider. The slider is provided with an endless circulating path having a load path section, a return path section and a pair of curved connecting path sections, each connecting the corresponding ends of the load and return path sections. The rail is formed with an inner guide groove and the slider is formed with an outer guide groove located opposite to the inner guide groove so that a combination of the inner and outer guide grooves defines the load path section. The outer guide groove has a Gothic arch shape having a pair of upper and lower curved surfaces, each of which is in contact with the rolling member at one contact point.

Abstract: A ball circulation unit in which a cage guiding balls consists of inner segments and head pieces which are axially connected to each other by centering bars so as to form one unit held in the basic member. The centering bars may be fixed in the head pieces, for example, and the centering bars increase the stiffness of the cage, permit it to be manufactured from plastics and achieve accurate centering of the cage parts relative to each other, thereby ensuring undisturbed circulation of the balls in the ball rows.

Abstract: A linear bearing (20) with a height adjustment mechanism (58) including a stud (64) fixed to the bearing (20) and a tubular bushing (72) received over the stud (64) and mating with a threaded bore (86) in an end wall (88) of a mounting structure (12). A reaction nut (80) threaded to a protruding end of the stud (64) bears on a protruding end of the bushing (72), the other end bearing against the bearing (20) so that rotation of the bushing (72) in either direction causes a shift of the bearing (20) in either direction. A locking nut (92) threaded onto the bushing (72) is selectively advanced against end wall (88) to lock the bushing (72) in an adjusted position.

Abstract: A bearing assembly mounted on a shaft provided with one or more ball conforming grooves, the bearing assembly including a bearing retainer sleeve supporting one or more ball retainers that provide recirculating ball bearing raceways, each raceway having a load-free portion and a load-bearing portion adjacent a grooved load-carrying plate, with each load-carrying plate corresponding to a shaft groove being mounted in the retainer so as to be capable of reorienting itself about the line of balls under loading between such load-carrying plate and its corresponding shaft groove.

Abstract: A thin type linear motion rolling guide unit with a deviation preventing apparatus of a holder mainly comprises: a flat attaching plate having a pinion rod; a U-shaped long bed fixed onto the attaching plate and having horizontal track grooves on opposite inner wall surfaces; an inverse U-shaped long table having outer horizontal track grooves on the outer wall surfaces, the table being slidably inserted in an inner cavity of the bed with gaps; and a U-shaped long holder arranged between the bed and the table. First and second pinions having the same tooth shape and a gear ratio of 1:2 area formed in the upper portion of the pinion rod so as to penetrate the bottom wall of the bed and a long hole formed in the holder and to project therefrom. A J-shaped second rack member is attached to the inner wall surface of the table. A rack surface is formed on the inner wall surface of the second rack member in engagement with the teeth of the second pinion.

Abstract: A composite motion guide unit comprises a single shaft having ball screw groove and a ball spline groove in an outer peripheral surface thereof in an overlapped manner, a nut mounted on the shaft through a number of balls, and a spline outer sleeve mounted on the shaft through a number of balls. The composite motion guide unit is incorporated in a housing, as a composite motion guide device, in which the nut and the spline outer sleeve are rotatably mounted through respective pairs of support bearings incorporating a number of balls, and the nut and said spline outer sleeve are independently driven through power transmission members. The balls interposed between the nut and the shaft are pre-loaded in an axial direction thereof, balls incorporated in the support bearing in support of the nut are pre-loaded, and balls interposed between the spline outer sleeve and the shaft are pre-loaded in a substantially rotating direction thereof.

Abstract: A rolling guide unit may include a cylindrical shaft with track grooves in the axial direction, a hollow outer cylinder with a hole for the shaft and track grooves facing the track grooves of the shaft, balls in the track grooves, and side plates attached to the ends of the outer cylinder with ball direction turning passageways to couple the outer cylinder track grooves and the ball return passageways. The side plates may include a thin inside plate and a thick outside plate, each of which has a cross sectional surface corresponding to a cross sectional surface of the outer cylinder. A mountain-shaped bridge portion having an arc-shaped cross sectional groove and defining an inwardly curved track is provided on the surface of the inside plate between the openings for the direction turning passageway and the return passageway. On the outside plate, a direction turning passageway U-turn portion is formed like an arc-shaped notched groove to correspond with the openings of the inside plate.

Abstract: The invention proposes a linear guidance unit in which a guide rail is mounted at the bottom of a U-shaped guide housing, a traveller being guided by means of endless ball races to move on this guide rail.

Abstract: There is provided a linear motion rolling guide unit mainly comprising a square pillar-shaped long track rail having rail side track grooves formed in the longitudinal direction on both side surfaces of the rail, a casing having an inverse U-shaped cross section mounted over the rail through a concave portion, a pair of side plates fixedly joined to both longitudinally end surfaces of the casing, and rolling ball return passages formed in parallel in correspondence to the casing side track grooves. An endless circulating passage for rolling elements is formed by coupling at the extreme ends, the casing side track grooves and the return passages extending in parallel thereto by opposingly arranged arc-shaped direction turning passages. The track rail, casing, and side plates are made of high performance engineering plastics. Cylindrical projections and/or arcuate bridge-shaped U-turn tracks are formed on both longitudinally end wall surfaces of the casing.

Abstract: The bearing is intended for incorporation in devices effecting linear motions along axles of round section. It comprises a monolithic prismatic cassette and ball chains, disposed inside continuous two-track grooves. These grooves are machined totally in the thickness of the cassette walls, and the non-working sectors of the ball chains are disposed close to the cassette edges and along said edges. The external surface of the cassette is enclosed by the internal surface of the sleeve which is of identical geometric shape. This design makes possible the increase of the number of ball chains disposed in one wall and, hence, of the load-carrying capacity of the bearing.

Abstract: A linear motion rolling contact bearing assembly includes a rail having a U-shaped transverse cross section and a pair of guide grooves defined on the opposite side walls of the rail and a slider which is received in the U-shaped rail to travel along the rail. The slider is preferably provided with a pair of endless circulation paths located side-by-side each of which is provided with a plurality of rolling members. A part of each of the endless circulation paths is defined as a load path section which is located opposite to the corresponding one of the pair of guide grooves and where the plurality of rolling members are partly exposed to come into engagement with the pair of guide grooves of the rail to provide a rolling contact between the slider and the rail. The slider is also provided with a feed-in port for each of the pair of endless circulation paths, and thus the rolling members may be fed into the endless circulation paths through the feed-in ports.

Abstract: A rectilinear motion rolling guide unit comprises: a long track rail having an I-shaped cross section; a casing having an inverse U-shaped cross section; and rolling elements interposed between the track rail and the casing. The casing rides over the track rail through a cavity portion having an inverse U-shaped cross section formed in the central lower portion of the casing. The corners of the upper and lower projecting portions on both sides of the rail are chamfered into inclined surfaces, thereby forming two upper and lower rail side track surfaces. Two upper and lower casing side track surfaces are formed on the inner peripheral surfaces of the cavity portion at the positions corresponding to the rail side track surfaces. The rolling elements are interposed between the opposite rail side and casing side track surfaces, respectively, thereby allowing the relative free slide motion to be executed between the track rail and the casing. Return passageways are formed in the casing.

Abstract: A fixing assembly for fixing a revolving shoe of a rolling member guide to a supporting element, including an eccentric assembly having a cylindrical bore in a revolving shoe, a cylindrical pin fixed on the one hand in a bore of the supporting element and accommodated on the other hand in a cylindrical pin bore arranged eccentrically relative to the cylindrical outer face of the eccentric bush, the revolving shoe 2 being adjustable relative to the running tracks of the guiding rail via a collar provided with an outer hexagon so as to permit adjustment of play by displacement, additionally, the cylindrical bolt has a threaded extension onto which a nut may be screwed, a securing plate fixed the position of the eccentric bush and the nut, and a fixing pin assembly with a cone is provided which engages a corresponding conical bore of the supporting element.

Abstract: A bearing apparatus has a bearing block including balls; two adjacent ball rolling surfaces with the load lines through the balls diverging from or converging toward each other, and unloaded ball passages opposing the ball rolling surfaces; end caps mounted to the opposite ends of the bearing block for forming two endless tracks by providing communication between the ball rolling surfaces and the unloaded ball passages; and a track rail having two ball rolling grooves along which loaded balls roll. The bearing block further includes a separation portion or member and two loaded ball grooves separated by the separation portion or member and having openings which are positioned so that the load lines diverge from or converge toward each other. The width of each of the openings is smaller than the diameter of each of the balls, and the ball rolling surfaces are formed in the loaded ball grooves.

Abstract: A ball bearing assembly for guiding two machine parts in linear relative motion. Upper, intermediate and lower members are assembled to an inverted U-shaped bearing body which straddles the sides of a rail base. Grooves formed between the members and the bearing body provide circulation paths on either side of the rail base for ball bearings. All components are accommodated within the width of the bearing body.

Abstract: The present invention relates to a bearing for both linear and curvilinear motions which has a track rail, a bearing body provided with an endless track and a multiplicity of balls which recirculate through the endless track provided in the bearing body, wherein the endless track is defined by a loaded ball rolling surface which is provided with a linear loaded domain and a curvilinear loaded domain having a predetermined curvature, so that, in a linear area of the track surface of the track rail, a load is born by balls rolling on the linear loaded domain, whereas, in a curvilinear area of the track surface of the track rail, a load is born by balls rolling on the curvilinear loaded domain. Thus, it is possible to perform both linear and curvilinear guide operations with a single bearing.

Abstract: A rectilinear slide ball bearing consists of a slide board, a pair of cover members, a rail-like track mount and a multiplicity of balls. The slide board assumes a substantially gate-like configuration and has a pair of load ball grooves formed in the inner surface of a recession in the longitudinal direction. The cover members include ball circulation passages for constituting ball endless tracks. The balls roll between the load ball grooves of the slide board and ball rolling grooves formed in the track mount while undergoing the load. The pair of one-sidedly provided up-and-down load ball grooves formed in each sleeve portion of the slide board are internally formed with ball rolling surfaces and constituted by deep grooves whose opening width is smaller than at least a diameter of the ball. With this arrangement, the balls do not come off from the load ball grooves of the slide board when separating the slide board from the track mount.

Abstract: A self-contained linear bearing unit presenting a single line of bearing support therewith is comprised of a retainer having ball-loaded paths and ball-unloaded paths with turnaround paths being located in end sections of the retainer. Caps received on the end sections capture the ball bearings and a bearing plate is disposed over the balls in the ball-loaded path. The unit can be made in a linked together chain of such units and various bearing configurations can be formed from plural ones of such units arranged in a desired disposition.

Abstract: A ball spline linear motion rolling guide unit comprises: a ball spline shaft on which first track grooves are formed in a longitudinal direction at predetermined positions on an outer peripheral surface; a hollow outer cylinder having a hollow hole into which the ball spline shaft is slidably inserted; second track grooves formed on an inner peripheral surface of the hollow hole so as to face the first track grooves of the ball spline shaft; and balls inserted between the first and second track grooves, wherein the arc center of the second track groove formed on the outer cylinder is slightly deviated to the side of the ball spline shaft from the center of the ball inserted between the first and second track grooves, the entrance portion of the second track groove is formed by an arc surface having a diameter which is slightly larger than the diameter of the ball, thereby constructing a supporting portion of the balls, and an almost V-shaped notched groove is formed in a bottom portion of each of the first a

Abstract: A linear motion bearing assembly is provided having a pair of aligned shafts which are fastened together, and a pair of bearings which either roll or slide on the aligned shafts. The shafts may be fastened together along a joint formed on their outer surfaces or they may be fastened together with a spacer disposed between the shafts.

Abstract: The invention relates to a guide unit (10) for effecting linear motion. It includes a rail body (12) having longitudinal recesses (20) in which shafts (22) are held so as to protrude with their outside (24). The top face (18) of the rail body comprises edges by way of upper ribs (26) which may be elastic or adjustable in opposition to rigid lower ribs (28). Along the center of the rail body (12), there are evenly spaced hollows (32) into which fitting pieces (30) are squeezed. For improved force-fit, the top (18) of the rail body (12) may have a longitudinal slot (52) with bores; if cylindrical rollers ar pressed thereinto, the upper ribs (26) bend down to firmly and uniformly grip the shafts (22). These may be positively engaged by linear ball bearings (42) of a carriage (40) slideably mounted to the guide unit (10).

Abstract: A short-slide positioning table employs precision grooves machined in opposed edges of a slide thereof for receiving preloading forces applied thereto through bearings from similar opposed grooves in arms of a U-shaped frame of a positioning table. A bearing guide moves bearings released from the downstream end of the slide to a bearing-return tube for return to the upstream end of the slide where they are again captured. Tapered transition regions at each end of each groove in the slide permit easy release and capture of the bearings. In one embodiment of the invention, a force-relief portion is disposed between two contact portions of the groove in the slide. The force-relief portion is set back from the contact portions a sufficient distance to reduce preloading forces in these regions to about zero. Tapered transition regions are provided between the contact portions and the force-relief portions.

Abstract: The invention relates to a roller circulating shoe with clamping device, on the sloping rear side of which a one-sided checking wedge, which can be shifted by means of an adjusting screw, is disposed with its sloping side, with a guiding insert lying between the clamping device and the checking wedge.Pursuant to the invention, the essence lies therein that the guiding insert (5) has a projection (7), which is formed on at least one side of the guiding insert (5) and fits into the transverse groove (6), which is formed on the sloping rear side (2) of the roller circulating shoe (1), furthermore on one end of the guiding insert (5) a projection (8) is formed, which is suitable for adjustments in two direction, rotatably holds the adjusting screw (3) and is provided with a groove and in the end of the checking wedge (4) near the projection (8) of the guiding insert (5) that is provided with a groove, the threaded borehole (9) holding the adjusting screw (3) is formed.

Abstract: A linear ball-bearing device for guiding an object along a cylindrical shaft including comprising a bearing block having a contact surface for contacting the object and having a plurality of ball loops, each ball loop comprising radially inner and radially outer ball rows interconnected by curved ball deflection rows, the radially inner ball rows being supported radially outwardly on axially extending load-carrying surfaces which are provided on a cylindrical inner surface of the bearing block, the radially outer ball rows running in return channels in the bearing block and the deflection-curve ball rows being guided by concave semi-circular grooves which are arranged on a cage sub-assembly, the cage sub-assembly having hook flanges each of which has an axially inwardly directed hook end surface engaging an axially outwardly directed channel aperture surface of the respective return chamber, each hook flange also having an outer peripheral surface for engagement with an inner peripheral surface of the bearing

Abstract: A ball bearing for lengthwise movement has a cage sleeve between a shaft and a housing. The cage sleeve has a plurality of circumferentially distributed channels in which a corresponding row of circulating balls is arranged. The balls loaded by the shaft travel in one linear raceway and return unloaded in another linear raceway, the ends of the linear raceways being connected by a pair of reversing raceways. A load-transmitting raceway rail is seated in each of a plurality of openings in the cage sleeve. Each raceway rail has a raceway groove formed by an inner shoulder and an outer shoulder which overlies the linear raceway for loaded balls, a surface portion which overlies the linear raceway for unloaded balls, and a pair of end surfaces which overlie the respective reversing raceways.

Abstract: A linear motion rolling contact bearing assembly includes a slider unit having a main body, in which a pair of endless circulating paths for rolling members is formed, and a U-shaped frame, and having a rail extending over a predetermined length and having a U-shaped cross section for slidably receiving therein the slider unit. An end mounting section for mounting to an exterior member outside of the assembly is formed at least at one end of the U-shaped rail and/or the U-shaped frame. Thus, any deformation and/or distortion, which may be produced when mounting the assembly to an apparatus, is prevented from being transmitted to the remaining part of the assembly, thereby maintaining a high dimensional precision and structural integrity.

Abstract: An endless ball spline has an outer casing provided in the inner peripheral surface thereof which a plurality of axially extending parallel grooves including loaded ball grooves and cage securing grooves serving also as non-loaded ball grooves. A pair of cages are fitted inside the outer casing in such a manner that both axial ends of the combined cages project from both axial ends, respectively, of the outer casing, each cage having cage sucuring pieces at each end thereof. A plurality of annular grooves are formed in each cage. End covers are respectively fitted on the combined projecting portions of the cages fitted in the outer casing. Each end cover is provided with ball turning grooves which are respectively communicated with the corresponding axial grooves formed in the outer casing and which respectively oppose the corresponding ball turning grooves formed in the cages. The outer casing, the cages and the end covers are assembled together to define ball recirculating endless track bores.

Abstract: A linear motion rolling contact bearing assembly includes a rail, a slider movable along the rail, and a plurality of balls partly interposed between the slider and the rail to provide a rolling contact relation between the slider and the rail. The rail is provided with at least one inner guide groove and the slider is provided with at least one outer guide groove which is located in an oppositely disposed relation to the inner guide groove, thereby defining a load section. The slider is also provided with an endless path which includes the load section as a part thereof, and a plurality of balls are received in the endless path. The inner and outer guide grooves are structured such that each of the balls in the load section contacts at one point with each of the inner and outer guide grooves under light load conditions. Under heavy load conditions, all of the balls in the load section contact at two points with each of the inner and outer guide grooves to provide an increased load bearing ability.

Abstract: A spindle or leadscrew and an associated nut, forming part of a driving assembly of the circulating-ball type, have helical threads of symmetrical profiles in the shape of pointed arches whose flanks engage the recirculating balls along respective helical contact lines. With the spindle virtually non-deformable in the axial direction, the pitch of its thread exceeds that of the nut thread (in the absence of stress upon the latter) by a small differential--specifically 0.02%--lying well within the limits of elastic axial deformability of the nut. Upon rotation of the spindle relative to the nut for the transmission of an axial force, this differential results in an approximately uniform stress distribution among the sets of balls lying in confronting turns of the spindle and nut threads.

Abstract: An electro-mechanical shaker apparatus utilizing a novel design is disclosed. The shaker apparatus includes a bearing housing which includes a plurality of return channels located concentric to the inner wall of the housing. A plurality of balls are positioned between the shaft and inner wall of the housing, as well as in the channels. Top and bottom retainers, having recessed areas which permit the balls to move from the interior position next to the shaft to one of the channels, are placed to enclose the balls within the housing. As the shaft moves axially, the balls recirculate through the channel. Because there are no movement restrictions to balls located in the interior position next to the shaft, the bearing may also be used for rotational movement of the shaft.

Abstract: A linear-motion bearing unit includes a track shaft and a bearing body. The bearing body has both skirts and a recess formed between the skirts, and is moved in a straight line along the track shaft by fitting the recess on the track shaft through the intermediary of rolling members. The linear-motion bearing unit further includes a longitudinal side plate made of a synthetic resin. The side plate is mounted within a longitudinal notch formed on the outer side of each skirt, such that the notched outer side of the skirt and the inner side of the side plate together form non-loaded rolling member rolling passages through which rolling members rolling between the bearing body and the track shaft are circulated.