A pivot bearing for an actuator assembly of a disk drive includes a first stationary member, a second pivoting member, and a third flexible member interconnecting the first and second members. The first stationary member is secured preferably between the base and top cover of the drive, while the second pivotal member is secured to the actuator. The second pivoting member rotates about the stationary member, and the third flexible member bends in response to the pivoting action of the second member. Rolling contact occurs between bearing surfaces of the first and second members. Overall bearing stiffness is increased with use of the bearing, and particularly radial stiffness. Increased bearing stiffness enhances system mode frequency and thereby improves bandwidth capability for a disk drive.