Wenderoth, Lind & Ponack, L.L.P.
Cage for constant velocity universal joint, fixed type constant velocity universal joint incorporating same, and drive shaft incorporating said fixed type constant velocity universal joint
Provided is a cage (5, 65, 95) for a constant velocity universal joint, which is formed into a ring shape with a substantially uniform thickness, including a plurality of pockets (20, 80, 110) formed in a circumferential direction of the cage (5, 65, 95), for receiving torque transmitting balls, respectively, the cage (5, 65, 95) being formed of carbon steel including 0.41 to 0.51 mass % of C, 0.10 to 0.35 mass % of Si, 0.60 to 0.90 mass % of Mn, 0.005 to 0.030 mass % of P, and 0.002 to 0.035 mass % of S, with the balance being Fe and an element inevitably remaining at the time of steelmaking and refining, the cage (5, 65, 95) being subjected to carburizing, quenching, and tempering as heat treatment, each of the plurality of pockets (20, 80, 110) having a side surface (23, 83, 113) finished after the heat treatment.
NTN CORPORATION
F C C C C C F C F C F C F F C C F C F
F16D C22C C21D C22C C22C C23C F16D C22C F16D C22C F16D C21D F16D F16D C22C C23C F16D C21D F16D
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Rikuou Masafumi Kazuhiko Masato Kenta
Takagi Osugi Yoshida Chokyu Yamazaki