Invention Application
- Patent Title: Rolling bearing device
- Patent Title (中): 滚动轴承装置
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Application No.: US09867636Application Date: 2001-05-31
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Publication No.: US20020037120A1Publication Date: 2002-03-28
- Inventor: Susumu Tanaka , Hiroyuki Ito
- Applicant: NSK LTD.
- Applicant Address: null
- Assignee: NSK LTD.
- Current Assignee: NSK LTD.
- Current Assignee Address: null
- Priority: JPP.2000-161337 20000531; JPP.2000-204802 20000706; JPP.2000-382732 20001215
- Main IPC: F16C033/32
- IPC: F16C033/32 ; F16C033/62 ; F16C033/34

Abstract:
The material of inner ring, outer ring and rolling element is formed by a steel material having a chromium (Cr) content of 5% by weight or more. The material is then subjected to cutting. Thereafter, the material thus cut is subjected to heat treatment so that the surface hardness HRC of the worked material is 58 or more. Subsequently, the worked material is subjected to grinding. A working denatured layer present on the surface of the worked material is then removed. Subsequently, an oxide film comprising chromium atom and iron atom at a ratio (Cr/Fe) of 0.5 or more is formed on the surface of the worked material. Accordingly, it is possible to provide a rolling bearing excellent in corrosion resistance and fretting resistance.
Public/Granted literature
- US06398420B1 Rolling bearing device Public/Granted day:2002-06-04
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