Friction bearings typically operate under which condition?

Friction bearings, also known as plain bearings or bushings, are designed to support loads while allowing relative motion between moving parts with minimal wear. They typically operate effectively under conditions of low speed and high load.

This configuration is suitable because friction bearings rely on a lubricant to create a film that minimizes direct contact between the bearing surfaces. At low speeds, the lubrication is more effective, reducing the risk of overheating and excessive wear. Additionally, these bearings can handle a significant load because their design distributes weight across a larger area, thereby reducing the pressure on any single point.

Operating under high speeds can lead to insufficient lubrication and increased wear, while running under low load conditions may not adequately engage the bearing surfaces, leading to uneven wear and potential failure. Therefore, the combination of low speed and high load optimizes the performance and lifespan of friction bearings, making this scenario ideal.