| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller bearing easily forming a hard carbon film on a rib. SOLUTION: This roller bearing has a rib 5 for guiding a roller. Where, an inner ring 1 forming the rib 5 is axially split at a rib 5-including surface in a diameter direction to leave a raceway at an inner ring body 1a side. A lubricating coating film is formed on the roller guide surface 6 of the rib 5 and the abutting part of the inner ring split part 1b and the inner ring body 1a. |
