| 摘要 |
PROBLEM TO BE SOLVED: To provide a low-cost roller equipped with a raceway surface having a circular arc section allowing simple processing and with its outside diameter measurable accurately. SOLUTION: The roller 1 is equipped with raceway surface 2 having a swollen section shape in circular arc, in which the maximum diametric part of the raceway surface 2 is formed as cylindrical surface 3 having a specified width. In case the roller 21 is equipped with such a raceway surface 2 as having a recessed section in circular arc, the minimum diametric part of the raceway surface 22 is formed as cylindrical surface 23 having a specified width. |
