Plain bearings, often referred to as journal bearings, are ubiquitous components in mechanical systems, providing essential support and reducing friction between moving parts. Their simple design and remarkable durability make them indispensable in various industries, including manufacturing, automotive, and aerospace.
A plain bearing consists of a cylindrical or spherical surface that slides or rotates against a mating surface. The bearing material is typically metal, plastic, or composite, and it is designed to withstand the load and maintain a low coefficient of friction.
The choice of the right plain bearing is crucial for the efficiency, reliability, and longevity of machinery. These bearings play a vital role in:
Application | Material | Load | Speed |
---|---|---|---|
Automotive engine | Bronze | Medium | High |
Industrial machinery | Sleeve bearing | Heavy | Medium |
Aerospace | Ball bearing | Light | High |
Advantage | Disadvantage |
---|---|
Low cost | Limited load capacity |
Simple design | Higher friction than rolling bearings |
Durable | Not suitable for high-speed applications |
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