Sleeve bearings are plain cylindrical bushings that support rotating or reciprocating shafts through a continuous load-bearing surface rather than rolling elements, and encompass materials including bronze, PTFE-lined composites, and sintered powder-metal alloys, produced via processes such as centrifugal casting, isostatic pressing, and precision honing to achieve the tight diametral clearances required for hydrodynamic or boundary-lubrication regimes in aerospace actuation and accessory drive applications.
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