Abstract: A linear motion guide unit includes a track rail having a first rail raceway surface and a second rail raceway surface each extending in a longitudinal direction, a first slider relatively movably attached to the track rail and having a first slider raceway surface facing the first rail raceway surface and a planar first mounting surface, and a second slider relatively movably attached to the track rail and having a second slider raceway surface facing the second rail raceway surface and a planar second mounting surface. The first slider is provided spaced apart from the second slider as viewed in the longitudinal direction. The second mounting surface is inclined with respect to the first mounting surface as viewed in the longitudinal direction.

Abstract: A bearing includes a first raceway member having an annular first raceway surface on an outer circumferential surface thereof, a second raceway member having an annular second raceway surface facing the first raceway surface on an inner circumferential surface thereof, and a plurality of rolling elements arranged in an annular rolling path along the first and second raceway surfaces so as to contact the first and second raceway surfaces. At least one of the first and second raceway members has a rolling element feed port formed as an opening of the rolling path. The bearing further includes a lid member disposed at the rolling element feed port, and a fixing member inserted into a first hole, formed in the lid member, and a second hole, formed in the at least one member to communicate with the first hole, to extend in a direction crossing an axial direction.

Abstract: A follower bearing 1 includes: a shaft 30 having an outer peripheral surface including an annular first raceway surface 11; an outer ring 60 having an inner peripheral surface including an annular second raceway surface 41 facing the first raceway surface 11; and a plurality of rollers 70 disposed on an annular raceway along the first raceway surface 11 and the second raceway surface 41 to be in contact with the first raceway surface 11 and the second raceway surface 41. The outer ring 60 includes an annular first member 40 made of steel and an annular second member 50 made of a resin and covering outer peripheral surfaces 44A and 44B of the first member 40. The first member 40 includes a cylindrical portion 42 having a hollow cylindrical shape and including the second raceway surface, and a projection 43 extending radially outward from the cylindrical portion 42. Ends of the projection 43 in the axial direction are filled with the second member 50.

Abstract: A speed reducer includes: ring-shaped external gear including outer teeth and through holes arranged circumferentially; input shaft penetrating space surrounded by an external gear inner circumferential surface; bearing between the external gear and input shaft; ring-shaped internal gear surrounding an external gear outer circumferential surface; inner pins penetrating the through holes axially; and inner pin holder holding both ends of each inner pin. The inner pin holder includes: first holder portion including a ring-shaped holding portion holding a first end of each inner pin; second holder portion including a ring-shaped holding portion holding a second end of each inner pin; and pillars connecting the first and second holder portion and penetrating the through holes. The speed reducer further includes fixing members that fix pillar end surfaces to the first holder portion or the second holder portion and are inserted in the pillars from the end surfaces of the pillars.

Abstract: A follower bearing 1 includes: an inner member 10 including a first body 50 and a flange 52; an outer ring 20; a plurality of rolling elements 40; and a first sealing member 30A including an annular first portion disposed between an outer peripheral surface 52A of the flange 52 and a first surface 22A and at least partially forming a sealing structure between the first portion and the outer ring 20. The first portion has an outer diameter that gradually increases toward a first end surface 52B at an end opposite to a first rolling surface 51A of the flange 52 in an axial direction.

Abstract: A linear motion guide unit includes a rail having a first raceway surface, a slider relatively movably attached to the rail, and a plurality of rolling elements. The slider includes a carriage, an end cap, and an end seal. The end seal includes a first lip portion exposed outwardly on one side in the longitudinal direction and in contact with the rail, and a second lip portion disposed inwardly of the first lip portion and in contact with the rail. The second lip portion has a negative allowance of interference that is greater in a first region facing the first raceway surface than in a second region facing a surface other than the first raceway surface.

Abstract: A straight-curved guide device including a rail and a movable element. The movable element includes a frame and first and a second swing portions. The swing portions are configured to be pivotable about connecting portions to the frame. Each swing portion includes an arm portion and first and second bearing portions. The first bearing portion includes first and second track members, and a plurality of first rolling elements. The second bearing portion includes third and fourth track members, and a plurality of second rolling elements. The straight-curved guide device further includes an elastic member, which is arranged across a space between the arm portions of the swing portions and is in a compressed state in which the elastic member is compressed in a longitudinal direction of the rail or a stretched state in which the elastic member is stretched in the longitudinal direction of the rail.

Abstract: A bearing includes: a first raceway member whose outer peripheral surface includes annular first raceway surface; a second raceway member whose inner peripheral surface includes annular second raceway surface facing first raceway surface; a plurality of cylindrical rollers arranged in circumferential direction such that cylindrical rollers contact first and second raceway surfaces in annular rolling path along first raceway surface and second raceway surface; and a separator adjacent to cylindrical rollers in the circumferential direction. The separator has cylindrical shape. An outer peripheral surface of the separator having annular groove defined by groove wall surface, a shape of groove wall surface in cross section including a center axis being arc shape. The separator being oriented such that groove wall surface contacts outer peripheral surfaces of cylindrical rollers adjacent to separator in circumferential direction.

Abstract: A straight-curved guide device includes a rail and a movable element. The movable element includes a frame, a first swing portion, and a second swing portion. Each of the first swing portion and the second swing portion includes an arm portion, a first bearing portion, and a second bearing portion. The first bearing portion includes a first track member, a second track member, a third track member, a plurality of first rolling elements, and a plurality of second rolling elements. The second bearing portion includes a fourth track member, a fifth track member, and third rolling elements. The second track member of each of the first swing portion and the second swing portion is connected to the frame, and the second bearing portion of each of the first swing portion and the second swing portion is separate from the frame.

Abstract: A rolling bearing includes a shell type outer ring having a raceway surface on an inside diameter side thereof, a plurality of rollers arranged on the raceway surface, and a retainer arranged on the inside diameter side of the shell type outer ring and retaining the plurality of needle rollers. The shell type outer ring includes a movement restricting portion that restricts a movement of the retainer in an axial direction. When a diameter of the rollers is a length D1 and a wall thickness of the shell type outer ring is a length T1, the length D1 is not more than 2 mm, and a relationship of 0.5?length D1/length T1<1.5 holds.

Abstract: A linear motion unit includes: a linear motion mechanism including a track member and a moving member; and a housing including a fastener. The fastener includes a first element, a second element meshable with the first element, a first slider, and a second slider located away from the first slider in longitudinal directions. The first slider and the second slider cause the first element and the second element to be separated from each other when the first slider and the second slider move away from each other, and cause the first element and the second element to mesh with each other when the first slider and the second slider move toward each other. The first slider and the second slider are fixable to the moving member.

Abstract: A rotary table (1) includes a base body (10), a worm wheel (21), an inner ring (22), a plurality of rolling elements, and a worm screw unit (30). The worm screw unit (32) includes a worm screw (31) and a worm screw housing (32). The worm screw housing (32) has an opposing surface that faces an outer circumferential surface (21B) of the worm wheel (21). The worm screw housing (32) includes a flange portion (325) that protrudes from the opposing surface and covers a side face (215A) that, of the first gear (215) facing the opposing surface, is on the opposite side from the base body (10) in the axial direction of the worm wheel (21).

Abstract: A straight-curved guide rail includes a straight part and a curved part and is configured to guide movement of a movable element. The straight-curved guide rail includes: a base part extending in a longitudinal direction of the straight-curved guide rail; and a track part, which is formed on the base part, extends in the longitudinal direction, and has a pair of rail ends, each including a track surface to be in contact with the movable element, on both side portions of the straight-curved guide rail in a width direction of the straight-curved guide rail. A region of the straight-curved guide rail, which includes an end portion of the straight-curved guide rail in the longitudinal direction, includes a low-stiffness region in which portions including the track surfaces have lower stiffness than stiffness of other region.

Abstract: Provided is a lubricant composition including a bicyclic liquid crystal of formula (1), tricyclic liquid crystal compounds of formula (2), and formula (3). The composition is suitable for use in a clean environment, under a high vacuum, under high temperature and a bearing. R1 and R2 are the same or different from each other, and each is —OCH2CH2CH(R?)CH2CH2OR. R11 and R21 are the same or different from each other, and each is —OR. R12, R13, R22 and R23 are the same or different from each other, and each is hydrogen or a group —OR. R31 and R41 are the same or different from each other, and each is —OCH2CH2CH(R?)CH2CH2OR. R32, R33, R42, and R43 are the same or different from each other, and each is hydrogen or —OCH2CH2CH(R?)CH2CH2OR. R is a linear or branched CnH2n+1, 1?n?20, and R? is methyl or ethyl.

Abstract: A rotary table device which includes a base portion, a bearing, a table rotatably supported with respect to the base portion via the bearing, and a motor operable to rotate the table in a rotational direction of the bearing. The motor includes a coil row fixed to the base portion and having a plurality of flat, annularly wound three-phase coreless coils arranged side by side, and a magnet row arranged opposite to the coil row and fixed to the table, and having a plurality of plate-shaped magnets arranged side by side in a circumferential direction of the table with alternating magnetic poles. The table has an outer circumferential surface on which a scale is printed around the entire circumference. A sensor for reading the scale is mounted on the base portion.

Abstract: A linear motion guide bearing 1 includes a rail 10, a slider 20, and a plurality of rolling elements. The slider 20 has formed therein a pair of circulation passages, which are spaces connecting one end and another end in each of a pair of load-carrying races, which are spaces between a pair of first rolling surfaces 41 and a pair of second rolling surfaces 42. In a cross section perpendicular to the longitudinal direction, the rail 10 includes a bottom wall portion 11, a first side wall portion 12, a second side wall portion 13, and a top wall portion 14. One first rolling surface 41 is made up of a wall surface 15A on an inner side of a first corner portion 15, which is a region where the second side wall portion 13 and the bottom wall portion 11 are connected. The other first rolling surface 41 is made up of a wall surface 16A on an inner side of a second corner portion 16, which is a region where the first side wall portion 12 and the top wall portion 14 are connected.

Abstract: A follower bearing module includes a follower bearing, a fixing element, and a fastening element. The follower bearing includes an inner member, an outer ring having an annular second raceway surface that faces a first raceway surface, and a plurality of rolling elements. The inner member includes a large diameter portion having the first raceway surface, and a shaft portion extending from the large diameter portion and having at least a portion accommodated in a mounting hole. The fixing element includes a cylindrical portion disposed in a shaft through hole and having a threaded groove on its inner circumferential surface, and a plate-shaped portion provided at one end of the cylindrical portion. The fastening element fastens the follower bearing and the fixing element with the cylindrical portion being disposed in the shaft through hole. At least one of the follower bearing and the fixing element includes a rotation prevention mechanism.

Abstract: In a linear motion guide unit, a raceway groove formed in a casing of a slider includes a first raceway surface extending along the length direction of the slider and a second raceway surface facing the first raceway surface and extending along the length direction of the slider. The second raceway surface includes a first portion including a center portion in a length direction of the casing, and a second portion including end portions in the length direction of the casing and having a wall surface shape different from a wall surface shape of the first portion. In the first portion, the first raceway surface and the second raceway surface define a symmetric Gothic arch groove, and in the second portion, the second raceway surface has a surface recessed from a position symmetric to the first raceway surface.

Abstract: A follower bearing module includes a follower bearing, a fixing element, and a fastening element. The follower bearing includes an inner member, an outer ring having an annular second raceway surface that faces a first raceway surface, and a plurality of rolling elements. The inner member includes a large diameter portion having the first raceway surface, and a shaft portion extending from the large diameter portion and having at least a portion accommodated in a mounting hole. The fixing element includes a cylindrical portion disposed in a shaft through hole and having a threaded groove on its inner circumferential surface, and a plate-shaped portion provided at one end of the cylindrical portion. The fastening element fastens the follower bearing and the fixing element with the cylindrical portion being disposed in the shaft through hole. At least one of the follower bearing and the fixing element includes a rotation prevention mechanism.

Abstract: A rotary table includes a base body, a movable ring rotatably arranged on the base body, a fixed ring arranged on an inner periphery side of the movable ring and fixed to the base body, and a plurality of rolling elements. The rotary table includes a sensor fixed to the base body and a dog fixed to the movable ring. The movable ring has a scale extending at least at a portion of an outer peripheral side surface, and a groove-shaped recess formed to be recessed inward from an outer periphery of the movable ring at a position corresponding to the scale on the outer periphery. The dog has a leg portion fitted to the recess, and a detected portion protruding outward from the leg portion and detectable by the sensor. The leg portion is able to be fixed to the movable ring at any position in the recess.