What are the two primary types of anti-friction bearings?

The correct response identifies the two primary types of anti-friction bearings as ball bearings and roller bearings. Ball bearings utilize spherical balls to minimize friction between moving parts, making them well-suited for applications where loads are relatively light and speeds are high. Their design allows for smooth operation and efficient load distribution.

Roller bearings, on the other hand, employ cylindrical rollers to support heavier loads. They can handle larger forces and impact loads better than ball bearings, which makes them ideal for heavy-duty applications. The use of rollers allows for a larger contact area with the races, increasing load-carrying capacity while still minimizing friction.

Recognizing these distinctions helps in selecting the appropriate bearing type based on the specific requirements of a mechanical application, such as the nature of loads, speed, and alignment conditions.