Title:
ROLLER BEARING
Document Type and Number:
Japanese Patent JP2023137154
Kind Code:
A
Abstract:
To provide a roller bearing that can be improved in wear resistance and in lubrication performance.SOLUTION: The roller bearing comprises an inward member, an outward member, rollers 4, 5 intermediated between raceway surfaces of the inward member and the outward member, and a cage holding the rollers 4, 5. The roller bearing further comprises a DLC film 9 on the outer periphery of each of the rollers 4, 5. The DLC film 9 has three-layer structure of a metal layer 9a, an intermediate layer 9b as a metal and DLC mixed layer, and a surface layer 9c sequentially from the base material side of each of the rollers 4, 5. A recessed portion 16 in which lubricant is held is provided in the surface layer 9c of the DLC film 9, and the recessed portion 16 includes a polymer-like carbon. The nanoindentation hardness of the recessed portion 16 is 13 GPa-16 GPa.SELECTED DRAWING: Figure 3B
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Inventors:
KIBA YUSAKU
SEKO KAZUMASA
MIYAKE KOJI
TANAKA SACHIKAZU
SEKO KAZUMASA
MIYAKE KOJI
TANAKA SACHIKAZU
Application Number:
JP2022043205A
Publication Date:
September 29, 2023
Filing Date:
March 17, 2022
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
NIPPON ITF KK
NIPPON ITF KK
International Classes:
F16C19/38; B32B3/30; B32B9/00; B32B15/04; C01B32/05; F16C33/36; F16C33/64; F16C33/66
Attorney, Agent or Firm:
Shuji Sugimoto
Takero Tsutsumi
Daisuke Kaneko
Hiroki Taniguchi
Kenichi Nakata
Yuka Kobayashi
Shinji Nakao
Takero Tsutsumi
Daisuke Kaneko
Hiroki Taniguchi
Kenichi Nakata
Yuka Kobayashi
Shinji Nakao