Roller bearing for hard disk swing arm

Abstract

There is provided a roller bearing for a hard disk swing arm, which is configured to improve the response characteristics of the swing arm by reducing a change in torque hysteresis of a swing arm retaining force with respect to time passage in a HDD drive state. The roller bearing (14, 16) is configured to swing and rotatably support the swing arm provided in a hard disk drive. The roller bearing (14, 16) includes: an inner ring (14a, 16a); an outer ring (14b, 16b); a plurality of rolling elements (14c, 16c) disposed between the inner ring (14a, 16a) and the outer ring (14b, 16b); and a retainer (14d, 16d) that retains the plurality of rolling elements (14c, 16c). The inner ring (14a, 16a) and the outer ring (14b, 16b) have a surface hardness of 700 HV or more and less than 800 HV, and each of the rolling elements has a surface hardness of 945 HV or more and less than 1060 HV.

Dependencies are inferred from the claim text.