Bearing retainer and method of fabricating the same

Details Bearing retainer and method of fabricating the same Bearing retainer and method of fabricating the same

1997-04-16

1998-11-10

Footland, Lenard A.

Bearings

Rotary bearing

Antifriction bearing

384625, F16C 3356

Patent

active

058333738

ABSTRACT:
A bearing retainer having a body formed of steel has a nitride layer on the body surface. The average particle diameter of a nitride contained in the nitride layer is not more than 1 .mu.m. The surface of the retainer is subjected to fluoriding treatment, and is then subjected to nitriding treatment. The above-mentioned oxide is removed by replacing an oxide on the surface of the retainer with a metal fluoride film by the fluoriding treatment. In the nitriding treatment, a gaseous mixture of gas for nitriding, for example, ammonia gas and hydrogen gas for removing the metal fluoride film is brought into contact with the surface of the retainer. A precise and uniform nitride layer is obtained in a state where the oxide is reliably removed from the surface of the retainer.

REFERENCES:
patent: 5571341 (1996-11-01), Jackel
patent: 5630668 (1997-05-01), Ikezawa et al.

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