Patent ID: 11965556
Assignee: NSK LTD.
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F  G

Claim 5:
6. A method for selecting machining conditions of burnishing to be performed on a raceway surface of a bearing raceway ring, comprising:
obtaining a first curve indicating a yield shear stress in a depth direction of the raceway surface of a material forming the bearing raceway ring in a state before the raceway surface is subjected to the burnishing,
a second curve indicating a static shear stress in the depth direction of the raceway surface in a state in which the raceway surface is subjected to the burnishing, and
a third curve indicating a static shear stress in the depth direction of the raceway surface in a state in which rolling elements are in contact with the raceway surface and a static load is applied to the raceway surface; and

when a region surrounded by exceeding the first curve and the second curve and falling below the third curve is defined as an area A, and a region surrounded by exceeding the first curve and falling below the third curve is defined as an area S, selecting machining conditions satisfying the area A<the area S.