Ntn Corporation

Chiharu Ito

Hikaru Ishida

Seiichi Takada

Naoaki Tsuji

Masaaki Honda

A ball bearing is provided which includes inner and outer races each having a raceway groove; balls; and a retainer made of a synthetic resin, and in which abnormal noise is reduced. Either the raceway groove of the inner race, or each of the raceway grooves of the inner race and the outer race has a radius of curvature which is 104% or more and 109% or less of the radius of each of the balls.

Ball bearing

A retainer of synthetic resin is provided in such a way that abnormal heat generation in a bearing and wear of the retainer due to interference between the retainer and balls are less likely to arise while the bearing is rotating at a high speed. A retainer () of synthetic resin includes two annular members () made of synthetic resin and facing each other in the axial direction, the annular members defining therebetween a plurality of circumferentially spaced apart pockets () in which respective balls () are received. Concave spherical surfaces () are formed at the circumferential ends of the respective pockets () so as to extend along the outer peripheries of the balls (), and cylindrical surfaces () are formed at the axial ends of the respective pockets ().

Retainer made of synthetic resin for use in ball bearing and ball bearing

A one-way clutch is provided which has improved compactness. The one-way clutch comprises an inner member, an outer ring relatively rotatably mounted on the inner member, a rolling element mounted between the inner member and the outer ring, and a spring member for biasing the rolling element in one direction. A rolling element receiving portion having a predetermined wedge angle and a spring receiving portion communicating with the rolling element receiving portion are provided between the inner member and the outer ring. The spring member is received in the spring receiving portion, and the rolling element is received in the rolling element receiving portion and biased by the spring member toward the narrow side of the rolling element receiving portion. The inner member has a semi-columnar portion, which forms the rolling element receiving portion and the spring receiving portion.

Growing community of inventors

Mie, Japan

Chiharu Ito