The line shaft bearing provides radial support to which component?

• A. The housing
• B. The crankshaft
• C. The shaft
• D. The propeller shaft

Answer: (C)

Radial loads are forces perpendicular to the shaft’s axis, and line shaft bearings are there to keep the line shaft properly aligned while carrying those loads. The bearing fits between the rotating shaft and the stationary housing, with the inner race on the shaft and the outer race in the housing. This setup lets the shaft rotate smoothly while the housing stays fixed, preventing bending and misalignment along the line. The crankshaft and propeller shaft are separate components with their own bearings, and the housing is the stationary support structure—not the component being supported. So the line shaft bearing provides radial support to the shaft.