Rolling bearing for supporting rotary shaft of disk memory device
AssigneeNtn Corporation
InventorsKouya Oohira, Masaki Egami, Yoshinobu Akamatsu
Life of this patent
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Abstract
A rolling bearing for a rotary shaft of a disk memory device which can maintain high-accuracy optical or magnetic recording ability over a long period of time. The rolling bearing supports a rotary shaft of a disk of disk memory device or a rotary shaft of an arm of a head, and has an inner ring having an inner diameter of 8 mm or less, and a retainer formed by molding an oil-containing resin composition comprising 40-94 wt % of a synthetic resin, 1-40 wt % of oil conducting material, and 5-30 wt % lubricating oil. Lubricating oil is dispersed uniformly in the composition, and can bleed onto the surface through the fibrous oil conducting material.
Claims16
A rolling bearing for supporting a rotary shaft of a disk of a disk memory device, said rolling bearing comprising a retainer made from an oil-containing resin composition consisting of a polyamide resin as a main component, fibrous oil conducting material and an ester lubricating oil.
A rolling bearing for supporting a rotary shaft of an arm carrying a head of a disk memory device, said rolling bearing comprising a retainer made from an oil-containing resin composition consisting of a polyamide resin as a main component, fibrous oil conducting material and an ester lubricating oil.
A rolling bearing for supporting a rotary shaft of a disk of a disk memory device, said rolling bearing comprising a retainer made from an oil-containing resin composition consisting essentially of a polyamide resin as a main component, fibrous oil conducting material and an ester lubricating oil.
A rolling bearing for supporting a rotary shaft of an arm carrying a head of a disk memory device, said rolling bearing comprising a retainer made from an oil-containing resin composition consisting essentially of a polyamide resin as a main component, fibrous oil conducting material and an ester lubricating oil.
Dependencies are inferred from the claim text.