| 摘要 |
A roller bearing that can facilitate inspection of a crowning and a method of designing a crowning in which time and labor required for designing can be significantly reduced are provided. An optimal value z m [µm] of a drop amount of a crowning at an end of an effective length of a roller 13 is determined using Equation (1), below, from a diameter d[mm] of the roller 13 and an effective length L[mm] of the roller 13. Expression 1 0.40 �¢ d + L + 0.66 ‰¤ z m ‰¤ 0.46 �¢ d + L + 1.03 In addition, whether drop amounts at a plurality of positions in a bus-line direction of the crowning are within an allowable range in Table 1, below, is judged. As a result, product inspection can be easily performed on a production line. |
