What effect do high static loads typically have on bearing races?

• A. Create pitting
• B. Cause brinelling
• C. Promote excessive wear
• D. Lead to corrosion

Answer: (B)

High static loads can lead to brinelling, a phenomenon that occurs when heavy loads are applied to bearing races, causing the surface to deform. This deformation happens because the material of the bearing cannot adequately support the weight, resulting in permanent indentations or 'brinell' marks on the surface. The presence of these indentations can significantly impact the bearing's operational life by affecting the integrity of the rolling surface, thereby causing misalignment, increased friction, and ultimately premature failure.

Brinelling is particularly critical in powerplant inspections because it can lead to more severe mechanical issues if not addressed. While other issues such as pitting, excessive wear, and corrosion can also occur in bearings due to various factors, they are generally associated with different stress conditions, lubrication concerns, or environmental exposure rather than the direct effect of high static loads.