PLAIN BEARING Meaning and
Definition
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A plain bearing, also known as a bushing or sleeve bearing, is a type of bearing used to facilitate smooth rotational or linear movements between two surfaces. It is a simple and commonly used mechanism in machinery and equipment. The purpose of a plain bearing is to support and reduce friction in a moving part, ensuring efficient operation and reducing wear and tear.
The construction of a plain bearing typically involves a cylindrical or flanged hollow sleeve made of a low-friction material, such as bronze, plastic, or graphite. This sleeve is placed between the two surfaces that require relative motion, acting as a separator and providing support. The inner surface of the bearing is usually smooth and lubricated, allowing the rotating or sliding component to move freely. The outer surface of the bearing is often housed in a stationary structure, such as a bearing housing or a machine part.
Plain bearings are commonly found in various applications, including automotive engines, industrial machinery, aircraft parts, and household appliances. They are preferred in situations where simplicity, cost-effectiveness, and low maintenance are desired. However, plain bearings may require periodic lubrication to ensure proper functioning and reduce frictional heat buildup.
Overall, plain bearings play a crucial role in providing support, facilitating movement, and reducing friction between surfaces in numerous mechanical systems, contributing to the smooth and efficient operation of machinery and equipment.
Etymology of PLAIN BEARING
The word "plain bearing" has a relatively straightforward etymology.
The term "plain" stems from the Old French word "plain" which means "flat" or "level". It can also be traced back to the Latin word "planum", meaning "flat surface" or "level ground".
On the other hand, "bearing" refers to the action of supporting or guiding something, often by reducing friction. This sense of "bearing" has its roots in the Old English word "beran", meaning "to carry". It is also related to the Old High German word "beran" and the Old Norse word "bera".
When combined, "plain bearing" refers to a type of bearing that relies on a flat or level surface to provide support or reduce friction.
