The outer ball joint of the steering gear is an important connecting component of the steering system, with one end connected to the tie rod and the other end connected to the steering knuckle arm. It not only transmits steering power, allowing the steering wheel to drive the wheels to turn, but also adapts to the dynamic angle changes of the wheels during vehicle operation, ensuring precise steering and smooth driving. The outer ball joint in the car steering system plays a role in transmitting force between the tie rod and the steering knuckle arm. It can not only convert steering wheel movements into wheel deflection, but also compensate for the angular displacement of the wheels during bumps or turns, avoiding steering deviation and ensuring stable driving.