Patent ID: 8746982

Claim:
A rolling bearing device, comprising: an outer race on a stationary side; an inner race on a rotational side; a plurality of rolling elements interposed between a raceway surface of the inner race and a raceway surface of the outer race; a retainer for retaining the plurality of rolling elements; and an inner race spacer held in contact with an end surface of the inner race to perform axial positioning of the inner race, wherein the inner race spacer comprises an oil reservoir member having inner and outer peripheral surfaces, and a spacer cover fitted on the outer peripheral surface of the oil reservoir member, wherein the oil reservoir member is formed of a porous body made of a metal or a resin and has an oil supply port provided on a surface of the oil reservoir member with a surface opening ratio larger than the outer peripheral surface of the oil reservoir member, the oil supply port being opened on an outer peripheral surface of the inner race spacer via an oil supply passage, the oil reservoir member having pores containing lubricating oil, and wherein, at the time of rotation of the rolling bearing device, the oil reservoir member supplies the lubricating oil to an interior of the rolling bearing device by a centrifugal force.