Rolling bearing and method for producing the same

Abstract

To provide a rolling bearing which is superior in preventing electrolytic corrosion, suitable for use in applications where torque reduction of the bearing is required by reducing an amount of lubricant used or by using a lubricant having a low viscosity, and has superior acoustic characteristics and durability, a rolling element according to the present invention is made of an alumina-zirconia composite material including an alumina component and either a zirconia component or a yttria-zirconia component containing 1.5 to 5 mol % of yttria, a mass ratio of the alumina component to the zirconia component or the yttria-zirconia component being 5:95 to 50:50.

Description

technical field [0001] The present invention relates to a motor suitable for swinging by an inverter-controlled motor such as an air conditioner fan motor or a compressor, a rocker support pivot rod for a hard disk drive (HDD), a servo motor or a stepping motor, etc. Rolling bearings for moving motors. Background technique [0002] Motors such as an air conditioner fan motor and a compressor of a refrigerator are often converted and controlled for energy saving. However, a high-frequency current may flow from the inverter circuit to the inner and outer rings and rolling elements of the bearing in the motor, and electric corrosion may occur on the rolling surface (retaining ring surface). [0003] Many proposals have been made to prevent galvanic corrosion. For example, it has been proposed to provide an insulating layer made of synthetic resin, thermoplastic elastomer, synthetic rubber, or ceramics on the track surface of the track wheel (for example, refer to Patent Docume...

AI Technical Summary

Problems solved by technology

However, when a low-viscosity lubricant is used, the same oil film as silicon nitride is produced, and when a polar ester-based lubricating oil is used as a lubricant, there is a tendency to accelerate the wear of the rolling elements.

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