What part of an anti friction bearing carries the least load during operation?

In an anti-friction bearing, the part that typically carries the least load during operation is the outer raceway. This is because the majority of the load is distributed primarily across the rolling elements (balls or rollers) and the inner raceway. The outer raceway mainly serves as a support structure, and while it does bear some load, it experiences less stress compared to the areas in contact with the rolling elements.