The one-piece bearing retainer was hydroforming with hydraulic forging press, is manufactured from hardened stainless steel and has coined ball pockets, which provide a hard, smooth, low-friction contact surface to the balls. This design is very lightweight, smooth running, cost effective, and readily available. The one-piece stamped crown retainer is also used in radial bearings, but it has a slightly higher speed capability than the stamped ribbon design. For speeds exceeding the capabilities of this retainer, a machined retainer should be considered.
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