Abstract: In a rolling bearing for linear movements, two rolling member circuits arranged between one arm of a U-shaped guide carriage and a lateral face of a guide rail, are substantially perpendicular to one another with their force transmission planes and are substantially parallel to one another with their circuit planes. All rollers have parallel axes in each of the two roller circuits. The load-transmitting row of rollers and the return row of rollers are offset from one another in the axial direction of the rollers in both roller circuits.

Abstract: A multiple track linear motion recirculating roller bearing assembly is provided for movement on a substantially cylindrical shaft. The bearing assembly includes a housing with a pair of end caps having a plurality of radially arranged roller turnarounds therein positioned at either end. The housing defines a plurality of radially disposed axial roller tracks, each having both load-bearing paths and return paths, which paths are in communication with the roller turnarounds formed in the end caps. Axial roller guides are provided which extend longitudinally within the housing between the end caps and are uniquely formed as a single integral axial guide element. This integral axial guide element serves to receive and retain load-bearing plates therein. Rollers are disposed in both the load-bearing and return paths of the roller tracks and are adapted to efficiently move the carriage along a substantially cylindrical shaft.

Abstract: An indefinite linear motion rolling contact guide unit generally includes a rail, a slider and a plurality of rolling members interposed between the rail and the slider. The rail includes a pair of inner upper and lower guide surfaces at each side. The slider includes a horizontal section and a pair of vertical sections each at each side of the horizontal section and each of the vertical sections is provided with a pair of first and second endless circulating paths, each of which includes a load path section, a return path section and a pair of curved connecting path sections. The return path section of the second endless circulating path is located higher in level and further away from the center line of the guide unit than the return path section of the first endless circulating path to thereby allow to provide a mounting hole between the return path section of the second endless circulating path and an inner side surface of the vertical section.

Abstract: A linear movement guide bearing including a main body accommodating a pair of side by side roller trains is linearly movable in an axial direction along a raceway surface through rolling of the roller trains. A pair of side protection covers formed of metal plates are attached to the main body to respectively cover substantially the whole lateral sides of the main body and end caps which are fixed to axial opposite ends of the main body. A pair of end protection covers formed of metal plates are respectively fixed to outer end surfaces of the end caps to protect the end caps. The side and end protection covers insure the mechanical strength of the guide bearing against external impacts. Seal members are respectively attached to lower edges of the side and end protection covers to seal clearances between the lower edges of the protection covers and the raceway surface.

Abstract: A linear recirculating anti-friction bearing assembly is disclosed for movably supporting a workpiece on a support shaft in the form of a round way. The bearing includes a housing and an elongate inner roller race for supporting the work piece on the round way. A plurality of rollers are positioned within the housing and are recirculated between loaded positions between the inner race and the round way and unloaded positions through which the rollers are recirculated back to the loaded positions. The housing is configured to retain the rollers and includes roller retainer strips at the lower end portions adjacent the inner race to retain the rollers in position when supporting the housing on the round way and to retain lubricants within the housing. Additional dust/lubrication means are provided on the housing.

Abstract: A roller type linear guide apparatus includes a guide rail having V-shaped roller rolling grooves, respectively formed in lateral side surfaces, and a slider having V-shaped bearing mounting grooves respectively formed in inner surfaces of both side walls. A roller bearing which is mounted to each of the V-shaped bearing mounting grooves of the slider includes a pair of roller rows, and each row of rollers circulate along an elliptic infinitely circulating path. Circulating planes respectively containing the elliptic infinitely circulating paths of the two roller rows of the roller bearing are inclined to intersect each other so that loaded rollers of one of the two roller rows roll on one inclined surface of the V-shaped roller rolling groove and loaded rollers of the other of the two roller rows roll on the other inclined surface of the V-shaped roller rolling groove of the guide rail.

Abstract: A drive assembly for a universal joint of the tripot type comprises a drive block and bearing rollers which are retained by two cage pieces which are mounted on the respective opposite driving sides of the drive block so that the bearing rollers on each driving side are retained by a single cage piece. The cage pieces are retained on the drive block by fastening the cage pieces to each other or to the drive block.

Abstract: Herein disclosed are a linear sliding bearing and a linear sliding table, in which rollers have their sides pressed to suppress their rolling motions by the frictional force so that the sliding resistance of a sliding bed sliding on a track base may be increased. Since a predetermined rigidity can be attained even in the axial direction of the track base by increasing or decreasing the sliding resistance arbitrarily, a workpiece of high machining precision can be achieved when the bearing or table is used in a machine apparatus such as a machine tool.

Abstract: A guide rail has a main track surface on an upper surface and sub-track surfaces on both side surfaces. The guide rail is further formed with axially extending grooves in both of the side surfaces respectively below the sub-track surfaces. A slider having a substantially U-shaped cross section has roller type linear bearings which roll respectively on the main track surface and the sub-tract surfaces. The slider is provided with protruding portions at lower surfaces of both side walls of the slider which extend horizontally and inwardly into the grooves of the guide rail. The protruding portions are slidably in contact with inner surfaces of the grooves and prevent the slider from slipping out of the guide rail. Furthermore, seal members made from rubber are attached respectively to lower surfaces of the protruding portions so that inner edges of the seal member are slidably in contact with the inner surfaces of the groove.

Abstract: Positions of marker images included in two images obtained by a digital radiography system are detected by a marker position detecting section. The marker image intervals in each image are calculated by an extension rate correcting section in accordance with the detected positions of the marker images. Reduction/extension for one image is perfomed in accordance with the extension rate of the image obtained by a ratio of the calculated marker image intervals, thereby coinciding extension rates of two images.

Abstract: A linear motion bearing is disclosed which includes a rail having a plurality of load bearing surfaces and a carriage which rolls smoothly along the rail to slidably support any of a plurality of devices such as individual tools, pillow blocks, etc. The bearing carriage includes a plurality of rolling element surfaces which define with the load bearing surfaces of the rail, load bearing raceways for reception of cylindrical rollers. The carriage further defines return raceways which communicate with the loaded bearing raceways for conducting the rollers between the loaded and return raceways. The loaded bearing surfaces have a unique convex shape facing the working surfaces of the rollers and thereby avoid undue stresses otherwise occurring at the roller ends. A plurality of molded plastic roller retainers are provided with integral inner end caps to guide the rollers between loaded and return raceways. Outer end caps are positioned thereover to seal the bearing and facilitate lubrication.

Abstract: A guide rail of a linear guide apparatus has a pair of roller raceway surfaces extending axially and formed in boundary edges between an upper surface and both lateral side surfaces by chamfering the boundary edges at a slant angle of 45.degree.. A slider main body having an U-shaped cross section and straddling the guide rail movably is provided with a pair of roller rolling grooves formed in both inner corners respectively corresponding to the roller raceway surfaces of the guide rail. The rollers inserted in the roller rolling grooves have a chamfered surface inclined at an angle of 45.degree. formed by chamfering an inner or upward boundary edge between an inner end face and an outer peripheral surface. A roller retainer having a rectangular frame shape is disposed in a space between an inner surface of the slider main body and the upper surface of the guide rail by being supported at axial opposite ends thereof by end caps which are secured to opposite axial ends of the slider main body.

Abstract: Revolving guiding means in the form of individual cassettes serving to guide rolling members which are individually guided by cage elements having cylindrical portions which have a production axis extending at a right angle betweeen the centers of all rolling members contained in one cassette, furthermore, the individual cage elements are provided with guiding extensions arranged perpendicularly relative to the center plane and parallel to the center path which is the path covered by the center of a rolling member in the course of one revolution, so as to provide revolving guiding means which ensure safe guidance of the rolling member and which are suitable for balls and cylindrical rollers with inclined roller axes which axes may be inclined at different angles.

Abstract: Presented is a slide roller apparatus of elegant simplicity, high precision/cost ratio and few parts where the car/track/rollers are relatively movable and the only needed parts (excepting for attachment means). The car is unitary without end caps for the roller groove, the roller groove being machined or otherwise formed into the car with great precision. The ends of the rollers have a sliding engagement with a rail track surface. The tracks and cars may be made of high precision extruded aluminum hard coated and impregnated with a high lubricity material. The rollers preferably are softer than the tracks and may be made of plastic material. The slide roller apparatus has far ranging applications from sail boats to machine tools.

Abstract: An endless rectilinear motion rolling guide unit is provided, consisting of a track rail, a slide unit straddling said track rail and a plurality of cylindrical rollers intervened between the two members, so that said slide unit can make a rectilinear movement on said track rail. A slide bearing holding member having an inwardly and gradually decreasing height toward its one end is provided in a recess having the complementary cavity configuration that is in turn provided on the bottom wall surface of said slide unit. A friction member is secured onto the bottom surface of said slide bearing holding member in slide contact relation with the underlying track rail and the friction member can be longitudinally displaceable in the recess of the slide unit so as to adjust the contact pressure between the friction member and the underlying surface of the track rail due to wedging action deriving from the particular configuration of the insert relative to that of the recess receiving it.

Abstract: The invention provides a linear roller contact bearing assembly. It comprises a pair of elongate support means comprising a first and second elongate support member which are displaceable relative to each other in the direction of their longitudinal extension. The first support member is provided with two parallely running support rails arranged one above the other one, and the second support member is provided with a roller rail running parallel to the two support rails and arranged between the two support rails. The two support rails and the roller rail extend substantially along the entire length of the associated support means.

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 crossed roller rolling contact bearing assembly includes a pair of first and second members which move relative to each other, a guide channel defined between the first and second members and a plurality of rollers provided in the guide channel in a crossed arrangement with a spacer interposed between any two adjacent rollers. The spacer has a generally spherical outer peripheral surface and a pair of recessed, arc-shaped guide surfaces which have generatrix lines extending perpendicular to each other. Becuase of the spherical outer shape of the spacer, a generally wedge-shaped space is defined between the roller and the spacer so that a quantity of lubricant may be reserved therein to keep the guide channel sufficiently lubricated at all times.

Abstract: A linear needle roller bearing has a linear needle bearing block having two generally rectangular ends defining an outer peripheral bearing surface therebetween. The outer peripheral bearing surface extends perpendicular to the ends of the bearing block and forms a plurality of linear bearing surfaces. A plurality of needle rollers are disposed on the outer peripheral bearing surfaces and a retaining member is fixed to each end of the block. The needle rollers are standard needle rollers having the shape of right cylinders. Each retaining member has a lip which extends over one end of each of the plurality of needle rollers, thereby retaining the needle rollers on the block.

Abstract: An endless linear motion roller bearing assembly includes a rail, a slider and a plurality of rollers interposed between the rail and the slider. The slider is provided with at least one endless circulation path which includes a load path section defined between the slider and the rail, 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 rollers roll along the endless circulation path back and forth to provide a limitless relative motion between the rail and the slider. Each of the curved connecting path section is typically semicircular in shape and its outer half wall surface is defined by a V-shaped guide plate of a thin steel plate. Preferably, the V-shaped guide plate is formed with a tongue at one end where the curved connecting path section is connected to the load path section to provide a smooth transition.

Abstract: The bearing may be used in the housing of a constant velocity universal joint such as a front-wheel universal joint drive for motor vehicles. The bearing has a generally rectangular roller block provided with raceways around its entire periphery. Rollers fill all of the raceways. The ends of the raceways are defined by a pair of flexible end plates. The end plates yieldingly guide the roller ends.

Abstract: A four track-type endless rectilinear motion guide unit is provided wherein a slide unit is mounted on a track rail member with a plurality of parallel-arranged cylindrical rollers being intervened therebetween for endless circulation. The four endless circulation passages for rollers, viz., a pair of lower and upper passages on each of the opposing sides of the slide unit, viz., opposing sidewalls of the trackway members are arranged such that as seen in a cross section of the slide unit, their longitudinal axes cross each other at right angles, while the longitudinal lengths of the two endless circulation passages differ from each other so that the longer circulation passage encompasses the shorter circulation passage within the loop, but the lengths of the load carrying trackway surfaces of said two circulation passages are the same.

Abstract: A four track-type endless rectilinear motion guide unit is provided wherein a slide unit is mounted on a track rail member with a plurality of parallel-arranged cylindrical rollers being intervened therebetween for endless circulation. The four endless circulation passages for rollers, viz., a pair of lower and upper passages on each of the opposing sidewalls of the track rail member are arranged such that, as seen in a cross section of the slide unit, their longitudinal axes cross each other at right angles, while the two endless circulation passages differ from each other in size providing a longer endless circulation passage having a larger cross section and a shorter endless circulation passage having a smaller cross section, which are arranged such that the longer circulation passage encompasses the shorter circulation passages within the loop, but the lengths of the load-carrying trackway surfaces of said two circulation passages are the same.

Abstract: A split roller bearing assembly includes a bearing body, an endless roller bearing chain mounted on the bearing body, and a plurality of rollers mounted on the chain. The bearing body has a load bearing surface and a return surface which define a path for continuous recirculating movement of the rollers thereabout. The roller bearing chain includes a plurality of pins arranged in a spaced, parallel relationship, and link members connecting the axial ends of adjacent pins together. Each roller is mounted on a corresponding pin of the chain, and is split to define at least two roller components rotatably mounted co-axially to each other on the same pin. Each roller component is rotatable independently of the other roller component of the same pin.

Abstract: A retainer for use in a linear motion rolling-contact bearing is provided. In a linear motion rolling-contact bearing, there is provided an endless passage including a load passage section, a return passage sections and a pair of connection passage sections connecting the corresponding ends of the load and return passage sections. The rolling members, balls or rollers, are provided in the endless passage and they move endlessly so as to provide a relative motion between a rail and a slider assembly. The return and connection passage sections are defined in the slider assembly, but the load passage section is defined between the rail and the slider assembly so that there is normally provided a retainer for retaining the rolling members in position when they pass through the load passage section.

Abstract: A telescopic tripot universal joint comprises an inner drive member which has spherical trunnions, an outer drive member which has drive channels with parallel, planar side walls and drive assemblies which are pivotally mounted on the spherical trunnions and disposed in the drive channels. The drive assemblies comprise intermediate drive blocks, bearing rollers which engage the side walls of the drive channels to transmit torque and cage structure which retains the bearing rollers and which is secured to the intermediate drive blocks for simultaneous movement with the intermediate drive block.

Abstract: A linear recirculating roller bearing is disclosed where the rollers travel n an inclined groove where the non-loading rolling groove is parallel to the loading roller groove. In the preferred embodiment four sets of rollers are provided which are able to bear loads from any direction. The angle of the rollers with respect to the bearing is dependent on the materials used and the overall dimensions of the system so that the bearing gap expands, due to temperature changes, at the same rate as the rollers.

Abstract: A ball spline bearing provided with a driving unit wherein for a number of balls, endless circulation passages including track grooves in sets of two are formed in an external cylinder member, in which there is removably inserted a spline shaft having L-type notched grooves to form protrusions extending in the axial direction; on the both sides of the protrusion are formed track grooves respectively in opposition to the track grooves in the external cylinder member; each section remaining after the notched grooves and the protrusions have been removed from the spline-shaft circumference has a long enough circumferential length to form comparatively large rack teeth to bear a large load.By providing a pinion to engage with the rack, an accurate positioning in the rectilinear direction can be attained based on the engagement, further a small type of driving unit may be adopted to the bearing, to the reduction of manufacturing cost of the bearing.

Abstract: A linear motion rolling contact bearing assembly includes a rail, a slider subassembly slidably mounted on the rail and provided with an endless circulating path, and a plurality of AF-F rollers provided in the endless circulating path. Each of the AF-F rollers is generally cylindrical in shape and has a flat end surface at one end and a truncated dome-shaped end surface at the opposite end. The endless circulating path includes a pair of straight load and return sections and a pair of curved connecting sections each connecting the corresponding ends of the load and return sections. Preferably, the curved connecting section has a pair of outer guide surfaces each of which has a radius of curvature which is equal to or slightly larger than the radius of curvature defining the dome-shaped portion of each of the rollers.

Abstract: A roller bearing for an infinite rectilinear motion is composed of a long truck rail; a casing mounted astride the truck rail, and having truck faces in opposition to the truck faces of the truck rail, and having return passages for rollers arranged in a parallel-roller type between the faces of the truck rail and the casing. Side plates having direction change passages are fixed on the both longitudinal ends of the casing, and the direction change passages connect the truck face and the return passage. A shifting passage is formed at the connection of the truck face with the direction change passage to cause the rollers to go away off the truck rail without changing the angle between the roller axis and the horizon. Further, a twisting passage follows the shifting passage to change the angle between the roller axis and the horizon. Those passages enable rollers to smoothly go in and out of the truck face with relatively less resistance.

Abstract: A roller bearing installation, in which one or more roller bearing assemblies (30A, 30B, 30C) are prepackaged in a housing (18) having corresponding recesses (28A, 28B, 28C) receiving each bearing assembly (30A, 30B, 30C). An angled gib plate (52A, 52B, 52C) is bedded in each recess, each gib plate (52) including an inclined section (54) mating with an inclined surface (58) on a bearing assembly cover (72) to allow a bearing depth adjustment by lengthwise adjustment of the bearing assembly (30) in its recess, enabling position adjustment of the supported structure (10) and bearing preload adjustment. Accurate alignment of the bearing assembly (30) is achieved by a ball plunger (100) urging the same against a guide surface (57) of the gib plate (52). A fixture (110) is used to precisely locate each gib plate (52A, 52B, 52C) in a recess (28) while a moldable bonding material (109) in which each gib plate (52) is bedded sets up.

Abstract: The bearing is used on a mechanical machine part or apparatus part which allows linear movement of the part along a second machine part or apparatus part and also allows angularity of one part with respect to the second part. A generally rectangular roller block is provided with raceways around its entire periphery. Rollers fill all of the raceways. Two opposite raceways have their rollers enclosed; the other opposite raceways have rollers which are in exposed operating positions so that they may contact the second machine. The rollers are retained within the roller block by one or more roller retaining members.

Abstract: There is a parallel roller type roller bearing for an infinite rectilinear motion in which cylindrical rollers move in an infinite circulating passage. Two side plates are attached to both ends of the bearing unit, and a direction change passage communicated with the truck groove and formed in the same horizontal plane is formed in the side plate. A twisting passage is formed between the direction change passage and the truck groove. In the twisting passage, the cylindrical roller is gradually twisted until the central axis of the roller becomes vertical and is shifted from the truck groove into the unloaded region. In the cross section which is perpendicular to the slide direction of the bearing, the center of curvature of the twisting passage is located in the region contained by the extension line of the truck surface of the truck rail and the extension line of the end surface of the roller existing in the outside of the truck rail.

Abstract: A linear slide roller bearing unit has an elongated track shaft having left and right ridges projected laterally from both sides thereof and extending along the length thereof, each ridge being provided at each of its sides with loaded roller surfaces directed upwardly and obliquely downwardly and extending along the length of the ridge. The bearing unit further has a bearing block mounted on the track shaft for movement along the length of the track shaft. The bearing block has a substantially inversed U-shaped cross-section constituted by an upper horizontal flat portion and skirts suspended from both sides of the horizontal flat portion. The horizontal flat portion is provided in its upper and lower sides with pairs of non-loaded roller grooves and loaded roller grooves extending along the length of the bearing block. The non-loaded grooves are connected to the loaded grooves through turning grooves.

Abstract: A linear bearing for continuous longitudinal movement in which friction due to changes in the direction of rotation of the rollers is eliminated or substantially reduced. The linear bearing comprises a housing which defines at least one closed roller orbit having an inner surface and an outer surface for accommodating a plurality of rollers. Each roller orbit also comprises a load zone and a return travel zone, which are interconnected at both ends by reversal regions. The load zone is partly defined by a raceway located in the housing adjacent to the load zone for applying a load to the rollers, the raceway forming part of the outer surface of each roller orbit. Respective section planes of the rollers in the load zone and the rollers in the return travel zone intersect along an axis which extends parallel to the load zone, and advantageously define an angle of about 15.degree. to 60.degree., or more preferably about 40.degree. to 50.degree..

Abstract: A roller bearing for endless linear motion is composed of a long size track rail having a track groove on its outer face, a slide unit having an endless circuit including a track groove, said slide unit being mounted on the rail; and rollers being arranged in cross-roller mode for the endless linear motion. The circulation path for the roller is constructed by track grooves, return path and direction changing paths. The track groove and return path are straight and parallel to each other, and the direction changing path connects the track groove and the return path at respective ends. A slightly inclined clearance groove is provided on the both ends of the track groove on the side of the slide unit, and its angle is formed greater than the angle of the track groove. The boundary line between the track groove and the clearance groove is V-shaped, seen from the end face of the track rail, and the apex of the V-shape points to the side of the clearance groove.

Abstract: A roller bearing is composed of a truck rail, a casing mounted astride the truck rail and a number of rollers arranged in a parallel-roller type; a return passage formed in the casing is connected to a truck face of the truck rail through a direction change passage for an infinite rectilinear motion, further in a part of the direction change passage there is formed a twisting passage, which makes it possible to form the truck groove and the return passage approximately on the same horizontal plane. Further in a bearing having four rows of endless circulation passages, the twisting passage can be formed either only in a pair of corresponding roller-rows or in the all of the roller-rows. Thus there can be provided a roller-bearing having the lowest possible sectional height, and comparatively a great load capacity, at a reasonable price.

Abstract: A linear motion roller bearing for allowing an object such as a slider to move along a straight line defined, for example, by a track rail includes an endless path and a plurality of rollers having substantially the same size in diameter and height, which are arranged in contact in the endless path with their axes of rotation directed as rotated over 90.degree. alternately with respect to the longitudinal axis of the endless path. The endless path includes a pair of straight portions and a pair of semicircularly curved portions each of which connects the corresponding ends of the pair of straight portions. Each of the curved portions is so structured that the maximum number of rollers which can be present therein ranges between (even number +0.1) and (even number +0.5) if the pair of straight portions are not provided on the same horizontal plane and between (integer +0.1) and (integer +0.5) if the pair of straight portions are provided on the same horizontal plane or a plane close thereto.

Abstract: A crossed roller type linear motion rolling contact bearing assembly includes a straight rail and a slider mounted on the rail slidably therealong. An endless circulating path is defined in the slider, in which a plurality of rollers are provided. Since the path includes a load section where the rollers provide a rolling contact between the slider and the rail, the slider may slidably move along the rail. Also provided in the endless path are a plurality of roller separators each of which is interposed between two adjacent rollers thereby keeping these two rollers as spaced apart from each other at all times. The separator has a pair of roller-receiving recesses for holding therein the associated rollers in a crossed arrangement, and each of the roller-receiving recesses is so shaped that the roller received therein can change its orientation over a predetermined range so as to maintain a predetermined positional relationship between the two rollers received in the recesses on both sides of the separator.

Abstract: An improved recirculating roller bearing and a roller element therefor is disclosed in which the end members of the rollers have an axial bore within a portion of the cylindrical end member. The axial bore extends between 30% and 50% of the length, and between 20% and 30% of the diameter of the cylindrical end member.

Abstract: The subject matter of the invention is an adjustable straight-line guide for, more particularly, machine tools, whose guide shoe, in order to obtain improved frictional properties while reducing the "stick-slip" effect with high vibration-damping characteristics, has roller circulation combined with a sliding surface and for automatic alignment in respect to the sliding surface of the guide path, and also for initial stressing which is simple to effect, is held by adjusting elements, acting multi-axially, at the guided machine part.

Abstract: A linear roller bearing unit is disclosed in which a bearing body of channel-like cross section is mounted through rollers on a guide rail for linear motion therealong. The bearing body is formed at the central portion of the inner peripheral surface thereof with a longitudinally extending central groove, and at the opposite side portions of the inner peripheral surface thereof with a pair of longitudinally extending side grooves. The central groove is provided at its bottom surface with a pair of longitudinally extending loaded roller rolling surfaces in face-to-face relation with the corresponding loaded roller rolling surfaces on the guide rail. Each of the side grooves is provided at its bottom surface with a longitudinally extending loaded roller rolling surface in face-to-face relation with the corresponding loaded roller rolling surface on the guide rail. The bearing body further has four non-loaded roller rolling passages formed therethrough.

Abstract: The subject of the invention is an adjustable guide for machine parts of machine tools with guide shoes (15) in which provision is made for circulation of roller bodies (18) in combination with a sliding surface (17). Each guide shoe has pre-stressing and adjusting means (23) acting multiaxially. In order to avoid refinishing the guides that are secured to the fixed machine part (1), according to the invention guide rails (3) with fine-machined sliding surfaces (5, 6) are provided on the moveable machine part (2). Stands (7 to 10), having in their facing sides at least one cut-out (14) whose form corresponds to that of the guide rails (3, 4), are rigidly secured to the fixed machine part (1). One of the guide shoes (15) and its adjusting means is arranged in each cut-out side surface.

Abstract: A straight-sliding roller bearing and a straight guide apparatus mounted with the roller bearing are provided. The straight-sliding roller bearing comprises a slide base having loaded roller rolling faces and non-loaded roller rolling faces provided on a front end of a horizontal portion and on a lower end of a vertical portion, a pair of roller retainers attached to the front end of the horizontal portion and the lower end of the vertical portion of the slide base for forming endless roller raceways in conjunction with the loaded roller rolling faces and non-loaded rolling faces, a raceway base having rolling faces opposite to the respective loaded rolling faces, and a number of rollers recirculating in the respective endless roller raceways to support loads, wherein the slide base is provided with an attaching portion projecting from one end of the horizontal portion in the opposite direction to the horizontal portion.

Abstract: There is a track surface of a roller bearing for an infinite rectilinear motion in which many rollers roll in keeping with the adjacent relation with one another in an infinite circulating passage constituted such that both ends of a rectilinear load track and a return passage are coupled by direction turning passages, wherein slope ranges each consisting of a gentle slope range formed subsequently to a rectilinear load track surface and a steep slope range steeper than the gentle slope range and formed subsequently thereto are formed in both end portions of the load track surface and are continued to the direction turning passages on both ends of the load track, and concave portions which become narrow toward the longitudinal central portion of the load track surface are formed in the load track surface from both end portions thereof toward the slope ranges. The track surface may be formed as a U-shaped groove and the rolling axes of the adjacent rollers are parallel.

Abstract: A roller bearing for a linear motion includes a bearing body having its opposing side surfaces respectively formed with a loaded roller rolling passage and a non-loaded roller rolling passage which extend in the longitudinal direction of the bearing body. A pair of end caps are respectively secured to both longitudinal ends of the bearing body. Each of the end caps has a roller-turning passage which connects the loaded and non-loaded roller rolling passages. The roller bearing further includes a multiplicity of rollers disposed within the loaded and non-loaded roller rolling passages. The loaded roller rolling passage is constituted by two or more parallel loaded roller rolling grooves each having a depth smaller than the diameter of the rollers. The non-loaded roller rolling passage is constituted by two or more parallel non-loaded roller rolling grooves each having a depth larger than the diameter of the rollers.

Abstract: This invention provides a roller bearing for linear sliding movement comprising a sliding block formed with a loading groove and a non-loading groove at the top end of the horizontal portion and at the lower end of the suspending portion, a pair of roller guides mounted at the top end of the horizontal portion and at the lower end of the suspending portion of the sliding block, a raceway block having upper and side rolling faces opposing to the respective loading grooves and a plurality of rollers circulating through each of the infinite roller tracks for receiving the load, in which the raceway block is perforated with attaching holes in perpendicular to the upper surface of the horizontal portion, a load acting line downwardly extended in perpendicular and slanted upwardly are applied relative to the mounting holes and a horizontal urging force is exerted to the side of the sliding block to apply a preloading.

Abstract: A row arrangement of needles (17) maintained in a plate (18) is interposed between a raceway (13) and a slide or bush (14) which itself cooperates with a trunnion (11). The needles have a diameter which progressively increases from the center of the row to the end needles so as to achieve a self-centering of the plate.