What type of loads do roller bearings primarily absorb?

• A. Both radial and axial loads
• B. Only axial loads
• C. Only radial loads
• D. High thermal loads

Answer: (C)

Roller bearings are designed to primarily absorb radial loads, which are forces that act perpendicular to the shaft or axis of rotation. The structure of roller bearings allows them to carry these loads effectively due to their rolling elements, which help distribute the load across a broader surface area, reducing stress and wear.

While there are bearing designs specifically engineered to handle axial loads (which are parallel to the axis of rotation), standard roller bearings are not typically focused on that function. They are optimized for handling radial loads and may be limited in their capacity to handle axial loads without additional design features.

This distinction is key to understanding why roller bearings are chosen for particular applications. Their design is effective for applications where radial loads are prevalent, making them the preferred choice in many machinery and automotive contexts where such loads dominate the working conditions.