Patent ID: 8485733

Claim:
A roller bearing comprising: an inner raceway member that has an outer raceway surface; an outer raceway member that has an inner raceway surface; a plurality of rollers that are arranged between the inner raceway member and the outer raceway member; and a roller bearing cage that retains the plurality of rollers, wherein the roller bearing cage includes a plurality of spacers formed of a plurality of components that are separate from one another, the plurality of spacers being arranged along a circumference of the same circle, each of the spacer includes: a first cage bar that extends in substantially an axial direction of the circle, the axial direction defining a direction that is a direction perpendicular to a radial direction of the circle and perpendicular to the circumferential direction of the circle, the first cage bar having a first end portion disposed in a first axial direction and a second end portion disposed in a second axial direction; a second cage bar that is located on one side of the first cage bar in the circumferential direction of the circle and that extends in substantially the axial direction, the second cage bar having a first end portion disposed in the first axial direction and a second end portion disposed in the second axial direction; a third cage bar that is located on one side of the second cage bar in the circumferential direction and that extends in substantially the axial direction, the third cage bar having a first end portion disposed in the first axial direction and a second end portion disposed in the second axial direction; a first coupling portion that couples the first end portion of the first cage bar to the first end portion of the second cage bar; and a second coupling portion that couples the second end portion of the second cage bar to the second end portion of the third cage bar, the first cage bar, the second cage bar and the first coupling portion define a first pocket that is open at the second axial direction side, the second cage bar, the third cage bar and the second coupling portion define a second pocket that is open at the first axial direction side, and the plurality of rollers are each retained in the first pocket or in the second pocket.