What is a common characteristic of anti-friction bearings?

Anti-friction bearings are designed to reduce friction during operation, and a primary characteristic that defines their functionality is the use of rolling elements. These rolling elements, such as balls or rollers, provide a point of contact between the moving surfaces, allowing for smoother movement and less resistance compared to sliding bearings, which rely on surface contact. This design enables the bearings to support rotating shafts and handle radial loads effectively while minimizing wear and heat generation.

In contrast, while many anti-friction bearings are made of steel due to its high strength and durability, they can also be constructed from other materials such as ceramics or plastics depending on the application requirements. Additionally, while lubrication is essential for the longevity and efficiency of any bearing, anti-friction bearings do not necessarily require constant lubrication; they can operate effectively with periodic lubrication. Lastly, anti-friction bearings can handle certain thrust loads, though their capacity may vary depending on the specific design and application. Thus, the use of rolling elements distinctly characterizes anti-friction bearings in their function and performance.