Patent ID: 7431511
Filing Date: 2008-10-07
Classification: F16C

Abstract:
1. A rolling bearing comprising: outer and inner rings, at least one comprised of ceramic; a plurality of rolling elements interposed between the outer and inner rings; a seal groove having a sectional shape in an axial direction of said roller bearing of substantially a partial circular arc, and being formed on a shoulder portion of a raceway of one of the outer and inner rings; and a resin seal member including a peripheral edge portion fitted to the seal groove, said resin seal member comprising fluororesin, said resin seal comprising a linear tapered inclined face portion extending from an end of a circular arc of said peripheral edge portion in an inward direction toward an inner peripheral edge of said resin seal member, wherein the plurality of rolling elements include balls, the raceways of one of the inner and outer rings being formed in a groove shape and having a maximum depth, and the seal groove having a maximum depth, wherein the maximum depth of the seal groove is smaller than the maximum depth of the raceways, and wherein a width of the seal groove in the axial direction is equal to or smaller than ¼ of a total length dimension in the axial direction of the one of the inner and outer rings, and a radius of curvature of the seal groove is a value obtained by multiplying a depth of the seal groove by a multiplication factor of 5 to 30.