CAGE FOR CONSTANT VELOCITY UNIVERSAL JOINT

摘要

Provided is a cage for a constant velocity universal joint, which is capable of extending a life of a cutting tool and achieving reduction in manufacturing cost. The cage for a constant velocity universal joint includes: an outer diameter surface guided by an outer joint member; an inner diameter surface (15) guided by an inner joint member; and pockets for accommodating multiple balls which are interposed between the outer joint member and the inner joint member. A spherical surface roughness in a range extending from an axial center (17) of the inner diameter surface (15) to an end (A) side of the inner diameter surface (15) which corresponds to an opening side of the outer joint member is different from a spherical surface roughness in a range extending from the axial center (17) of the inner diameter surface (15) to an end (B) side of the inner diameter surface (15) which corresponds to an inner side of the outer joint member.