Hitachi, Ltd.

Seiichi Kurita

Kinpei Okano

Seishi Watahiki

Toru Nakayama

A vertical type antifriction bearing device which includes an antifriction bearing using balls or rollers as rolling members. This bearing device features that, during operation, the level of lubricating oil is maintained below the antifriction bearing allowing the feed of lubricating oil to the antifriction bearing in a suitable amount, and that during the stoppage of operation, the level of the lubricating oil is raised above the antifriction bearing, whereby during the stoppage of operation the antifriction bearing is shielded from atmosphere or moisture to prevent the corrosion thereof and, during the operation, the agitation loss caused by the lubricating oil is minimized.

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Takahagi, Japan

Seiichi Kurita