ACTUATOR AND HARD DISK DRIVE EMPLOYING THE SAME

摘要

An actuator and a hard disk drive having the same are provided. The actuator having a magnetic head movably mounted to move the head over a disk, the actuator including: at least two arm members extending parallel to each other; a spacer interposed between and contacting the arm members to maintain a distance between the arm members and having a step portion to contact the arm members; a pivoting member inserted through throughholes respectively formed in the arm members and spacer, wherein the arm members and the spacer form a stack assembly and rotate around the pivot member; and a nut member screwed with the pivoting member at an end of the pivoting member and clamping the arm member and spacer with the pivoting member, wherein the step portion has a ring-shaped contact surface.