Radial Load puts weight on the ball bearing and in result helps the bearing to rotate due to the tension. On the other hand, the thrust load is different and in a result, it puts stress on the bearing in a different way. On featuring an example, the rotating bar stool is the perfect example to analyse thrust load on the ball bearings.
If we study the motion of the car tires, it applies radial load on the bearing while driving in the straight line. The tires roll in the forward or backwards direction due to the tension and the weight of the car. In another case when we take the car around the corner, they subject to thrust load as now they are not moving in the radial motion. These corner forces apply weight on the side of the ball bearings.