Air bearings support rotating or linearly moving components on a pressurised film of air or gas, eliminating mechanical contact and wear, and are used in aerospace applications such as gyroscopes, inertial navigation systems, and precision spindles where near-zero friction, high rotational accuracy, and contamination-free operation are critical; designs include aerostatic (externally pressurised) and aerodynamic (self-acting) configurations machined to tight geometric tolerances.
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