Abstract: A rolling bearing includes a steel outer ring, a steel inner ring having a common central axis with the outer ring and disposed on an inner circumference side of the outer ring, and a plurality of rolling elements disposed to be able to roll on an inner circumferential surface of the outer ring and an outer circumferential surface of the inner ring. The outer ring includes a first outer ring and a second outer ring that is arranged alongside the first outer ring in a first axis direction in which the central axis extends and is fixed to the first outer ring. The inner ring includes a first inner ring and a second inner ring that is arranged alongside the first inner ring in the first axis direction and is fixed to the first inner ring. The outer ring has a protruding portion and a through hole corresponding to the protruding portion formed in one and the other of opposing portions in the first and second outer rings, the protruding portion and the through hole being fitted together.

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 rolling bearing 1 includes an outer ring 1A, an inner ring 1B, and a plurality of rolling elements. The outer ring IA includes a first outer ring 10 and a second outer ring 20. The inner ring 1B includes a first inner ring 30 and a second inner ring 40. In a cross section including a central axis R, grain flows 111 in the steel constituting the first outer ring 10 extend along a first rolling surface 511, grain flows 211 in the steel constituting the second outer ring 20 extend along a second rolling surface 512, grain flows 311 in the steel constituting the first inner ring 30 extend along a third rolling surface 513, and grain flows 411 in the steel constituting the second inner ring 40 extend along a fourth rolling surface 514.

Abstract: A caster 1 includes a wheel 10, a fork 20, a second member 20, and a rolling bearing 40. The rolling bearing includes an outer ring 40A, an inner ring 40B, and a plurality of rolling elements. The outer ring 40A includes a first outer ring 41 and a second outer ring 42. The inner ring 40B includes a first inner ring 43 and a second inner ring 44.

Abstract: A rolling bearing 1 includes an outer ring 1A, an inner ring 1B, a plurality of rolling elements 1C, and a seal member 1D. The outer ring 1A includes a first outer ring 10 and a second outer ring 20. The inner ring 1B includes a first inner ring 30 and a second inner ring 40. The seal member 1D includes an annular base portion 61, 71 fixed to one bearing ring which is one of the outer ring 1A and the inner ring 1B, and an annular protruding portion 62, 72 protruding from the base portion 61, 71 and extending toward a first region which is a region opposing the one hearing ring in another bearing ring which is the other of the outer ring 1A and the inner ring 1B.

Abstract: The present invention relates to a linear motion guide unit manufactured at low cost by forming at least a slider from a single metal plate, and reduced in sliding resistance of rolling elements as well as a method of manufacturing the same. The linear motion guide unit includes a guide rail, and the slider formed from a single metal plate. The guide rail has a bottom part, and a pair of longitudinal side parts standing from opposite sides of the bottom part, extending longitudinally in a mutually facing manner, and having respective raceway grooves in which the rolling elements roll. The slider includes an upper part, a pair of mutually facing sleeve parts extending downward from opposite sides of the upper part and having respective raceway grooves and return passages, and end cap parts formed respectively at opposite ends of the upper part and having turnaround grooves.

Abstract: A swing bearing allows a reduction in thickness, weight, and manufacturing cost by fixing together a pair of split rings each formed of a plate member to form an outer ring, and fixing together a pair of split rings each formed of a plate member to form an inner ring. The outer ring is composed of a pair of split rings which are obtained by splitting the outer ring at an axially midpoint of the first raceway groove, are formed of respective plate members, and are fixed together. The inner ring is composed of a pair of split rings which are obtained by splitting the inner ring at an axially midpoint of the second raceway groove, are formed of respective plate members, and are fixed together.

Abstract: The present invention relates to a linear motion guide unit manufactured at low cost by forming at least a slider from a single metal plate, and reduced in sliding resistance of rolling elements as well as a method of manufacturing the same. The linear motion guide unit includes a guide rail, and the slider formed from a single metal plate. The guide rail has a bottom part, and a pair of longitudinal side parts standing from opposite sides of the bottom part, extending longitudinally in a mutually facing manner, and having respective raceway grooves in which the rolling elements roll. The slider includes an upper part, a pair of mutually facing sleeve parts extending downward from opposite sides of the upper part and having respective raceway grooves and return passages, and end cap parts formed respectively at opposite ends of the upper part and having turnaround grooves.

Abstract: A swing bearing allows a reduction in thickness, weight, and manufacturing cost by means of fixing together a pair of split rings each formed of a plate member to form an outer ring, and fixing together a pair of split rings each formed of a plate member to form an inner ring. The outer ring is composed of a pair of split rings which are obtained by splitting the outer ring at an axially midpoint of the first raceway groove, are formed of respective plate members, and are fixed together. The inner ring is composed of a pair of split rings which are obtained by splitting the inner ring at an axially midpoint of the second raceway groove, are formed of respective plate members, and are fixed together. The split rings of the outer ring and the split rings of the inner ring are formed by press working on the respective plate members having predetermined thicknesses, respectively.