Title:
TAPPET ROLLER BEARING
Document Type and Number:
Japanese Patent JP2005163610
Kind Code:
A
Abstract:
To prevent occurrence of surface damage even if supply of engine oil can not catch up with at a time right after operation start of the engine or sudden acceleration and deceleration of the engine.
A carbon compound layer which is a surface treatment layer for friction reduction is formed on an outer circumference surface of a shaft 5. The carbon compound layer consists of a chromium metal layer, an inclined layer which is a composite layer consisting of chromium and carbon, and plastic deformation hardness by the microhardness test of the carbon compound layer is set to 15-58 GPa.
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Inventors:
KONNO MASARU
Application Number:
JP2003402809A
Publication Date:
June 23, 2005
Filing Date:
December 02, 2003
Export Citation:
Assignee:
NSK LTD
International Classes:
F01L1/14; C23C28/00; F01L1/18; F16C3/02; F16C33/34; F16H53/06; (IPC1-7): F01L1/14; C23C28/00; F01L1/18; F16C3/02; F16C33/34; F16H53/06
Attorney, Agent or Firm:
Takeo Koyama
Nakai Shun
Kinzo Koyama
Nakai Shun
Kinzo Koyama