LUBRICANT COMPOSITION USED FOR BEARING UNIT FOR HDD SWING ARM, AND BEARING UNIT FOR HDD SWING ARM ENCAPSULATING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a lubricant composition that is used for a bearing unit for an HDD swing arm in which torque rising of a bearing by accumulation of a grease degradation object resulting from an abnormal exothermic heat in a bearing inside is reduced, and the bearing unit for an HDD swing arm.;SOLUTION: A bearing unit 10 for an HDD swing arm includes: a shaft member 12 having a flange part 12a at one end part in an axial direction; inner rings 14a, 16a; outer rings 14b, 16b; and two or more rolling elements 14c (16c) that are disposed between the inner rings 14a (16a) and the outer rings 14b (16b), and includes a pair of bearings 14, 16 that is parallel disposed around the shaft member 12. A lubricant composition encapsulated in the bearing 14, 16 of the bearing unit 10 for an HDD swing arm comprises blending a urea compound into a base oil including an aromatic ester oil and a poly α-olefin as a thickener.;COPYRIGHT: (C)2014,JPO&INPIT