Abstract: An elongated retainer for use in a linear motion guide unit is provided. The retainer has a generally U-shaped cross sectional shape and formed with a recessed portion at each end thereof. The recessed portion is engageable with a corresponding stopper provided at each end of the guide unit so that the effective stroke of the retainer is increased by a sum of the depths of these two recessed portions.

Abstract: The linear motion rolling guide unit according to this invention enables the under seals to be mounted to the end seals reliably and free from deformation such as by buckling, thereby providing good sealing for relative-sliding portions at all times. The under seals are formed at both longitudinal ends with locking holes and the end seals are formed at the lower end with hook-shaped projections, each of which has a downwardly projecting portion and a bend locking portion. Mounting the under seals to the end seals is accomplished simply by fitting the hook-shaped projections of the end seals into the locking holes in the under seals, without requiring additional fastening parts.

Abstract: The linear motion rolling guide unit according to this invention enables the under seals to be mounted to the end caps easily without being deformed as by buckling or without requiring high-precision machining. The under seal is provided, at its longitudinal ends, with locking bands that engage with engagement grooves formed in the end caps. Mounting and dismounting the under seal to and from the end caps are accomplished by expanding the locking bands in the longitudinal direction of the under seal. The under seal is allowed to undergo longitudinal and lateral deformations with respect to the end caps, which deformations caused by external force, thermal expansion and swelling. This construction prevents deformation of the under seal such as caused by buckling and improves the sealing performance.

Abstract: An elongated retainer for use in a linear motion guide unit is provided. The retainer has a generally U-shaped cross sectional shape and formed with a recessed portion at each end thereof. The recessed portion is engageable with a corresponding stopper provided at each end of the guide unit so that the effective stroke of the retainer is increased by a sum of the depths of these two recessed portions.

Abstract: The linear motion rolling guide unit according to this invention enables the under seals to be mounted directly to the end seals without requiring other fastening parts, allows for machining errors and prevents the under seals from being deformed as by buckling. End seals attached to the outer sides of the end caps are formed at their lower ends with paired projections, and the under seals are formed at their longitudinal ends with locking notches. The under seals are placed in tight contact with the undersides of the casing and the end caps, and then the paired projections are inserted into the locking notches and the free ends of the paired projections are bent to firmly grip the core member of each under seal, thereby mounting the under seals to the end seals.

Abstract: The linear motion rolling guide unit has the under seals [13] mounted to the end seals [19] by fitting the engagement portions [30] formed at the longitudinal ends of the under seal [13] into the engagement holes [24] formed in the end seals [19]. The under seal [13] consists of an underside core member [27] having the engagement portions [30] and a resilient underside member [28] having lip portions [25,26]. Since the under seal [13] is not fixed to the casing [2] and the end caps [5], the under seal [13] will not easily deform or strain. Therefore, the under seals [13] attached to the end seals can seal the sliding surfaces very well.

Abstract: In the linear motion rolling guide unit, because the under seals are removably mounted to the end caps with ease, the under seals are prevented from being deformed or buckled and thus the guide unit does not require high precision machining. The under seals mounted to the end caps have lip portions that seal the gaps between the casing, the end caps and the track rail. A pair of projections provided to each end cap are inserted into an engagement opening formed in and extending longitudinally of the under seal to removably mount the under seal to the end caps with ease. The under seal is allowed to move with respect to the end caps as the under seal is deformed lengthwise and widthwide.

Abstract: The linear motion rolling guide unit permits the under seals to be mounted or dismounted easily to and from the end caps without causing deformations such as buckling to the under seal or requiring high precision machining. Projections with locking portions are provided to the undersides of the end caps and a half of each of the projections is cut away to make the projections elastically deformable. The under seal is formed with insertion holes for receiving the projections. The opposing longitudinal edges of each insertion hole are formed with locking detents at positions longitudinally offset or staggered. By elastically deforming the projections and inserting them into the insertion holes and then engaging the locking portions with the locking detents, the under seals can be mounted firmly to the end caps.

Abstract: The linear motion rolling guide unit allows the under seal for sealing the circulating passage for the rolling elements to be mounted to the end caps by simply engaging it with the end caps. The linear motion rolling guide unit also has the function of adjusting the under seal as it wears out. The under seal has a lip portion engaging with the underside of the casing and the end caps and a lip portion engaging with the side wall surface of the track rail. Locking portions are formed at longitudinal ends of the core member of the under seal, and insertion grooves are formed in the end caps attached to the ends of the casing. Mounting the under seal to the end caps can be accomplished simply by inserting the locking portions into the insertion grooves.

Abstract: The linear motion rolling guide unit utilizes the retainer bands for the rolling elements in positioning the under seals correctly with respect to the end caps and in facilitating the reliable mounting of the under seals onto the end caps. The end caps are formed with laterally extending first engagement grooves and vertically extending second engagement grooves. The core members of the under seals are formed at their longitudinal ends with brackets, each of which has a depressed portion for receiving the retainer band. The brackets are fitted into the second engagement grooves to place the under seals on the underside of the end caps. Then, the retainer bands are fitted into the first engagement grooves and into the depressed portions of the brackets to securely mount the under seals to the end caps.

Abstract: In the linear motion rolling guide unit the under seals are attached to the end caps to seal between the sliding surfaces in good condition in a way that prevents the under seals from being deformed or buckled. The under seals mounted to the end caps have lip portions that seal the gaps between the slider and the track rail. The projections provided to the end caps are fitted into the engagement openings formed in the under seal to removably mount the under seal to the end caps. The under seal is movable in the longitudinal direction relative to the end caps and is not rigidly secured to the casing. This construction renders the occurrence of deformation and strain unlikely.

Abstract: A linear motion rolling contact guide unit having a rod rail having a substantially circular cross section is provided. The guide unit also includes a slider slidably mounted on the rod rail and a plurality of rolling members interposed between the rod rail and the slider to thereby provide a rolling contact therebetween. The slider is so structured that it surrounds only a part the circumference of the rod rail and thus the slider has a generally U-shaped cross sectional shape. Since the rod rail is not surrounded completely, it may be placed in a V-shaped groove of a bed substantially over its entire stroke.

Abstract: A retainer for use in a linear motion rolling contact guide unit including a rail, a slider and a plurality of rolling members interposed between the rail and the slider is provided. The retainer is generally comprised of an elongated rectangular plate having a predetermined thickness and width. The retainer plate is formed with a plurality of pockets for receiving therein rolling members so as to keep the rolling members in position. In accordance with the present invention, the pockets have a first size in the transverse direction slightly larger than the characteristic size, e.g., diameter in the case of balls, of rolling members and a second size in the longitudinal direction substantially larger than the first size so that the pockets are generally in the shape of a slot with either a circular pocket provided in a central portion of the plate or the second size being large enough to accommodate two balls with a separator therebetween.

Abstract: A linear motion guide unit of the finite type includes an elongated rail, a slider, a plurality of rolling members interposed between the rail and the slider, and a retainer for retaining the rolling members in position. The rail is provided with a plurality of mounting holes, at least one of which is located at a central portion of the rail. The slider is provided with at least one access hole which may be brought into alignment with a corresponding one of the mounting holes so that a bolt or any other tightening member can be inserted into the mounting hole through the access hole.

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.