The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 04, 1994
Filed:
Nov. 24, 1993
NSK Ltd., Tokyo, JP;
Abstract
An object of this invention is to provide a rolling bearing which is increased in rolling fatigue life when used with a lubricant contaminated by foreign matters, and which is improved in wear resistance and in seizure resistance. In a rolling bearing, at least one of the inner race, outer race and rolling elements thereof is made of an alloy steel which contains 0.10 to 1.0 wt of C, 0.50 to 3.0 wt % of Cr, 0.10 to 2.0 wt % of Mo, 0.15 to 1.0 wt % of Si, 0.20 to 1.5 wt % of Mn, and 0.2 to 1.0 wt % of Ni, and which is carbo-nitrided so that the sum (C+N) of the contents of carbon (C) and nitrogen (N) in the surface layer thereof is 1.0 to 2.0%, and the ratio (N/C) of the content of nitrogen (N) to the content of carbon (C) is 0.8 to 2.0.