Abstract: A linear motion guide unit includes a rail having a raceway groove extending on each longitudinal side surface, and a slider fitting over the rail and movable relative to the rail. The rail includes a first rail member and a second rail member connected to each other in a longitudinal direction at a connecting portion. The first rail member has, at least at one end, a protrusion extending in the longitudinal direction. The second rail member has, at least at one end, a notch to be combined with the protrusion. In the connecting portion, the protrusion of the first rail member is combined with the notch of the second rail member to connect the first rail member and the second rail member. The protrusion and the notch are fixed with a columnar member extending in a direction intersecting the longitudinal direction.

Abstract: A linear motion guide unit includes a rail having a raceway groove extending on each longitudinal side surface, and a slider fitting over the rail and movable relative to the rail. The rail includes a first rail member and a second rail member connected to each other in a longitudinal direction at a connecting portion. The first rail member has, at least at one end, a protrusion extending in the longitudinal direction. The second rail member has, at least at one end, a notch to be combined with the protrusion. In the connecting portion, the protrusion of the first rail member is combined with the notch of the second rail member to connect the first rail member and the second rail member. The protrusion and the notch are fixed with a columnar member extending in a direction intersecting the longitudinal direction.

Abstract: In a cross roller bearing, an outer ring and an inner ring have respective mounting portions formed thereon in such a manner as to reduce the radial thickness of the bearing to thereby reduce weight. The cross roller bearing has rollers and separators disposed in a load-carrying race formed between the outer ring and the inner ring. The outer ring and the inner ring have the respective mounting portions located axially away from respective raceway surfaces. The outer circumferential surface of the outer ring and the inner circumferential surface of the inner ring are flat. The mounting portion of the outer ring does not radially protrude from the inner circumferential surface of the inner ring, and the mounting portion of the inner ring does not radially protrude from the outer circumferential surface of the outer ring.

Abstract: This table circulation guide device includes sliders and carriage attached to a table. In a working area, the table is guided by the sliders straddling straight track rails. In a non-working area, the table is guided by the carriages traveling on a curved track rail. An endless circulation circuit is formed by the straight track rails and the curved track rail. In the working area of the circuit, the table travels via the sliders straddling the straight track rails. In the non-working area of the circuit, the table travels via the carriages located between the sliders.

Abstract: In a finite linear motion guide unit, a retainer for retaining rollers rolling between guide members is formed into a V-like shape to thereby increase a rated load. A first guide member is formed into a V-like concave form, and a second guide member is formed into a V-like convex form. Needle rollers are retained by the V-shaped retainer and roll on a raceway formed by facing surfaces of the guide members. The V-shaped retainer includes a pair of roller retainer plate portions for retaining the needle rollers, and a retainer connection portion. A retainer straying prevention mechanism is composed of a pinion disposed in a cross-opening, and racks disposed on the guide members and meshing with the pinion.

Abstract: In a cross roller bearing, an outer ring and an inner ring have respective mounting portions formed thereon in such a manner as to reduce the radial thickness of the bearing to thereby reduce weight. The cross roller bearing has rollers and separators disposed in a load-carrying race formed between the outer ring and the inner ring. The outer ring and the inner ring have the respective mounting portions located axially away from respective raceway surfaces. The outer circumferential surface of the outer ring and the inner circumferential surface of the inner ring are flat. The mounting portion of the outer ring does not radially protrude from the inner circumferential surface of the inner ring, and the mounting portion of the inner ring does not radially protrude from the outer circumferential surface of the outer ring.

Abstract: This table circulation guide device includes sliders and carriage attached to a table. In a working area, the table is guided by the sliders straddling straight track rails. In a non-working area, the table is guided by the carriages traveling on a curved track rail. An endless circulation circuit is formed by the straight track rails and the curved track rail. In the working area of the circuit, the table travels via the sliders straddling the straight track rails. In the non-working area of the circuit, the table travels via the carriages located between the sliders.

Abstract: In a finite linear motion guide unit, a retainer for retaining rollers rolling between guide members is formed into a V-like shape to thereby increase a rated load. A first guide member is formed into a V-like concave form, and a second guide member is formed into a V-like convex form. Needle rollers are retained by the V-shaped retainer and roll on a raceway formed by facing surfaces of the guide members. The V-shaped retainer includes a pair of roller retainer plate portions for retaining the needle rollers, and a retainer connection portion. A retainer straying prevention mechanism is composed of a pinion disposed in a cross-opening, and racks disposed on the guide members and meshing with the pinion.

Abstract: A small-sized finite linear motion guide unit is provided in which there is provided a rack-and-pinion arrangement to prevent any discrepancy between retainer plates to make sure of relative sliding movement of guideways. A rack is composed of teeth portions and a pair of connecting bars to fasten the teeth thereon. The connecting bars are different in widthwise length to form asymmetrical shapes. The grooves for a rack made on the guideway includes a middle groove to get the rack to mate with the pinion, and sidewise grooves lying on both sides of the middle groove and having the connecting bars different in widthwise length to make an asymmetric shape.

Abstract: A slider is composed of four components except for rolling elements. A slider moving relatively to a guide rail is composed of a carriage having raceway grooves, a circulator to make a return passage and insert nuts to fit into through-holes in the circulator. Engaging parts of the carriage makes fit-engagement with holes in the circulator to make snap-fit between the carriage and the circulator to fasten them each other.

Abstract: A small-sized finite linear motion guide unit is provided in which there is provided a rack-and-pinion arrangement to prevent any discrepancy between retainer plates to make sure of relative sliding movement of guideways. A rack is composed of teeth portions and a pair of connecting bars to fasten the teeth thereon. The connecting bars are different in widthwise length to form asymmetrical shapes. The grooves for a rack made on the guideway includes a middle groove to get the rack to mate with the pinion, and sidewise grooves lying on both sides of the middle groove and having the connecting bars different in widthwise length to make an asymmetric shape.

Abstract: A slider is composed of four components except for rolling elements. A slider moving relatively to a guide rail is composed of a carriage having raceway grooves, a circulator to make a return passage and insert nuts to fit into through-holes in the circulator. Engaging parts of the carriage makes fit-engagement with holes in the circulator to make snap-fit between the carriage and the circulator to fasten them each other.

Abstract: A synthetic resin-made cage plate to retain rollers lies between guideway members. The smaller pitch between the adjacent rollers in a cage results in the greater number of the rollers lying in a preselected length of the cage to get heavier load-carrying capacity. A holder to receive a pinion is molded integrally with the cage plate. The rollers are retained in openings in the cage plate at a tilt such that their rotating axes are perpendicular to the lengthwise direction of the raceway surfaces and also tilting at 45 degrees relative to major surfaces of the cage plate. The openings on their contour edges have bearing lips to retain end surfaces of the rollers. The cage plate has flanges extending lengthwise on its' widthwise opposite edges and bulging sidewise out over the major surfaces of the cage plate to render the cage plate tougher to warp or bend.

Abstract: A synthetic resin cage plate to retain rollers is between guideway members. The smaller pitch between the rollers results in the greater number of the rollers in a preselected length of the cage to get heavier load-carrying capacity. A pinion holder is molded integrally with the cage plate. The rollers are retained in openings in the cage plate in such a tilt that their rotating axes are in perpendicular to the lengthwise direction of the raceway surfaces and also in tilting at 45 degrees relatively to major surfaces of the cage plate. The openings on their contour edges have bearing lips to retain end surfaces of the rollers. The cage plate has flanges extending on the lengthwise widthwise edges of the cage plate and bulging out over the major surfaces of the cage plate to render the cage plate tougher to warp or bend.