Key Takeaways:
Because the shaft never touches the bearing surface, there is no contact wear. Hydrostatic bearings offer theoretically infinite life—limited only by oil quality and system care, not by material fatigue.
Wear Comes From Contact
滚动与sliding 轴承 fail because surfaces touch, fatigue,与wear. 使用寿命为finite与degrades 精度 as clearances grow. 静压 轴承 remove root cause: 轴 or table 悬浮于 加压 油膜与never contacts 轴承 surface.

理论上 Infinite
与 no contact, there为no material fatigue与no progressive wear. 静压 支撑提供理论上 无限寿命—its real limits为oil 清洁度 (NAS 5+), correct temperature,与routine monitoring, not 轴承 wear.
Implication用于Owners
精度与刚度 stay constant用于 机床's working life. Capital invested在 静压主轴 or table为protected against gradual degradation 该 forces 滚动-轴承 机床 into retirement.