Which bearing type is generally better suited for handling heavy loads?

• A. Ball bearings
• B. Thrust bearings
• C. Roller bearings
• D. Sleeve bearings

Answer: (C)

Roller bearings are specifically designed to handle heavy loads more effectively than other types of bearings. This is due to their construction, which typically involves cylindrical rolling elements. These rolling elements distribute the load over a larger surface area, minimizing contact pressure and allowing for higher load capacity.

In comparison, ball bearings, while versatile and commonly used, have a smaller point contact area which makes them less suitable for very heavy loads. Thrust bearings are structured primarily for axial loads rather than radial loads, meaning they excel in specific applications like supporting vertical shafts but do not distribute heavy loads as effectively in all directions. Sleeve bearings, on the other hand, rely on a sliding motion and can be prone to wear under heavy loads, making them less ideal for high-stress scenarios.

This inherent design advantage of roller bearings allows them to sustain greater weight and manage the stresses associated with heavy loads, ensuring smoother operation and longer lifespan in applications where load-carrying capacity is critical.