Hydrodynamic bearing device, method for manufacturing the same, spindle motor and recording and reproduction apparatus

摘要

A hydrodynamic bearing device which can improve workability of injecting a lube repellant and effectively prevent leakage of a lubricant, a method for manufacturing the same, a spindle motor, and a recording and reproduction apparatus are provided. A hydrodynamic bearing device 4 includes a lube repellant 11 a which is applied in a circular shape by a predetermined distance in a radial direction from a portion of an upper surface of a second thrust flange 41 c where it is connected to a shaft 41 and a lube repellant 11 b which is applied in a circular shape on an outer peripheral surface of the second thrust flange 41 c below from an upper end in the radial direction by a predetermined distance. The lube repellant 11 b is applied near the upper end portion in a gap formed between the outer peripheral surface of the second thrust flange 41 c and an inner peripheral surface of an outer sleeve 44.