Patent ID: 6506121
Filing Date: 2003-01-14
Classification: B23P,F16D,Y10S

Abstract:
A heat-treated cage of a stationary type constant-velocity joint having an outer ring and an inner ring, said cage having a cylindrical portion formed with a plurality of pockets at equal angular intervals to receive balls for transmitting a turning torque between said outer ring and said inner ring, said cage having a spherical outer surface kept in contact with and guided by a spherical inner surface of said outer ring and a spherical inner surface kept in contact with and guided by a spherical outer surface of said inner ring,wherein each of said pockets has a pair of machined end faces that oppose each other in a circumferential direction of the cage and a pair of side faces that oppose each other in an axial direction of the cage, and said pair of machined end faces have a lower surface hardness than said pair of side faces that oppose each other in an axial direction of the cage.