Roller bearing
AssigneeNsk Ltd.
InventorsYasunobu Fujita, Keisuke Kimura, Michiharu Naka
Life of this patent
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Abstract
Enhanced fretting resistance, high-speed capability, and service live are achieved by a roller bearing comprised of a plurality of rolling elements held between inner and outer races with a cage interposed therebetween, and wherein oil film of lubricating oil of which the dynamic viscosity at 40° C. is 20 to 150 mm2/s, and which preferably contains an extreme pressure agent and a corrosion preventing agent, is formed on the raceway surfaces of the inner and outer races, the cage and the rolling elements and grease is enclosed.
Claims15
A fretting resisting spindle support roller bearing of a low-torque spindle drive, comprising a plurality of rolling elements held between inner and outer races with a cage interposed therebetween, wherein an oil film of lubricating oil of which a dynamic viscosity at 40° C. is at least 120 and not exceeding 150 mm2/s and effective to improve fretting resisting properties, and which contains an extreme pressure agent and a corrosion preventing agent, is formed on raceway surfaces of the inner and outer races, said cage and said rolling elements, and wherein a grease is enclosed.
Dependencies are inferred from the claim text.