ABSTRACT
Ball swaging process is a method of joining the Head Gimbal Assembly (HGA) with the actuator arm by firing the ball through the base plate. The radius of the base plate is expanded and attached to the actuator arm. There is a contact pressure between the base plate and the actuator arm. The contact pressure directly affects its retention torque. After measuring the position and the torque of the gimbals in the ball swaging process, it has been found that the suspension had the Roll Stack Attitude (RSA) and the Pitch Stack Attitude (PSA). Consequently, the distance between the gimbals and the platters and the power to press the gimbals or the roll static attitude were found to be inconsistent with the determined values. Previously, there were several remedies such as changing the diameter of the ball, coating the ball surface to reduce the friction between the ball and the base plate, changing the ball direction, and modifying the surface of the spacer. However, the problems could not be resolved completely because there has been no study related to the stress analysis, roll static attitude, roll static attitude and pitch static attitude that occurred when the ball was fired through the base plate.
