Which components make up anti-friction bearings?

The components that make up anti-friction bearings are two hardened steel rings, balls or rollers, and a separator. The inner and outer rings serve as the raceways where the balls or rollers roll, allowing for smooth rotation and reducing friction between moving parts. Hardened steel is commonly used for these rings due to its durability and ability to withstand heavy loads and high speeds.

The balls or rollers inside the bearing are what facilitate the movement and minimize the contact area between the rings, hence reducing friction. The separator, often referred to as a cage or retainer, keeps the rolling elements evenly spaced and prevents them from colliding with each other while ensuring they remain aligned within the rings. This design effectively enhances the efficiency and lifespan of the bearing by lowering friction and wear.

Other options do not accurately represent the typical structure of anti-friction bearings, emphasizing different materials or components that do not contribute to the essential function of reducing friction in rotating applications. Understanding the structure of anti-friction bearings is key for millwrights in selecting and maintaining this crucial machinery component.