The spherical plain bearing consists of an inner ring with a convex spherical outer diameter surface and an outer ring with a corresponding concave spherical inner diameter surface. This design is especially suitable for the bearing configuration that needs to meet the following conditions: it must be able to bear the misalignment between the shaft and the bearing seat, or it must be able to carry out reciprocating or periodic swing or rotary motion at a relatively slow sliding speed, usually under heavy load.
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