Which term describes a load on bearings that is neither purely radial nor exclusively axial?

• A. Combination
• B. Radial
• C. Thrust
• D. Tangential

Answer: (A)

A load on a bearing that isn’t purely radial or purely axial has components in both directions, so it’s a combination load. Radial load acts perpendicular to the shaft, while axial (thrust) load acts along the shaft. When both components are present, neither pure radial nor pure axial description fits, and the combined effect is described as a combination (mixed) load. This situation occurs in many real machines where gears, belts, or misalignment place forces in multiple directions, requiring bearings that can handle both radial and axial components. The other terms describe a single-direction load (radial or thrust) or are not the standard way to classify bearing loads.