Patent ID: 8282289

Claim:
A roller apparatus comprising: a plurality of rollers; and a retainer, wherein: said retainer includes a circular part having a diameter larger than a pitch circle diameter of a roller arrangement, a rib portion protruding from both sides of the circular part in an axial direction toward an inner diameter side, a plurality of pockets formed in said circular part so as to be arranged in a circumferential direction between which a pillar part is formed so as to contain said rollers, retaining means for preventing said rollers from escaping to the inner diameter side of the retainer, wherein the rollers are configured to directly abut an outer diameter face of a shaft and also directly abut an inner diameter face of a housing, said retaining means includes a roller-retaining click which is bent from an inner diameter edge of said rib portion inwards in the axial direction and extends between adjacent rollers, and a part of said retainer, other than said roller-retaining click, is hardened by high-frequency quenching and high-frequency tempering.