Bearing ring for roller bearing, manufacturing method of bearing ring for roller bearing, and needle roller bearing
US10393180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2018 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Aug 24, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2223/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A raceway of a roller bearing includes a first raceway whose raceway surface is under a relatively high compressive residual stress, and a second raceway whose raceway surface is under a compressive residual stress lower than the compressive residual stress applied to the raceway surface of the first raceway. The raceway surface of the second raceway has a Vickers hardness of 700 HV or more but less than 800 HV. The raceway surface of the first raceway includes a portion that is harder than the raceway surface of the second raceway and that is to be in contact with at least one of axial ends of a rolling contact surface of a roller. A rib includes a rib surface having a Vickers hardness of 450 HV or more but less than 550 HV.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.