• Ball is in Unconstrained Motion (X, Y, Z)	• Point Contact Causes Rolling, Sliding & Skidding
A ball Rolling in a bearing is in unconstrained motion, it has the ability to roll inthe X, Y, and Z planes. Because the radius of the inner ring and the outer ring are different, the ball is in a constant state of rolling, skidding, and sliding. It is this motion that is a major source of heat generation and wear in the bearing.