Nidec Corporation

Kazuto Mikami

Hironori Ando

Kentaro Takemura

In a wider flow pathsurrounded with a shaft, a thrust plateand an inner circumferential corner portionof a bearing sleevein a small clearancebetween a lower side radial bearing sectionand an upper surface thrust bearing section, chamfering is performed at the inner circumferential corner portionof the bearing sleeve, wherein a width of the wider flow pathin the radial direction in rotation is formed so as to be wider than a width of a communication holelocated below the wider flow pathin the radial direction in rotation to thereby render a flow of a lubricating fluidflowing into the wider flow pathfrom the communication holesmooth.

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Kyoto, Japan

Kazuto Mikami