A sleeve bearing (also known as a bushing bearing or plain bearing) is a straightforward and fundamental type of bearing. It primarily consists of an inner metal sleeve (known as the bushing) and an outer metal sleeve.
The fundamental working principle of bushing bearings involves the formation of a transfer film of solid lubricant on the bearing surface during the initial operating stages. This film develops through the frictional interaction and eventually coats the mating component, creating a solid lubricating layer and achieving self-lubrication.
Bushing bearings, also known as dry bearings or DU bearings. Typically, DU bearings consist of a steel backing, a porous bronze layer, and a polytetrafluoroethylene (PTFE) lining.
Generally, "bearings" facilitate movement between two parts and reduce friction. A typical bearing has two surfaces that roll against each other, allowing the two mating parts to move without friction.
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