| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability and durability of a flanged cylindrical roller bearing that is operated in high speed while bearing both of radial and axial loads. SOLUTION: A diameter (α) of a concave portion 21a formed at a center portion of a cylindrical roller 14 is 0.5 to 0.8 times of the diameter (D) of the cylindrical roller 14. An effective flange height (h) of a flanged portion is also 0.15 to 0.25 times of the diameter of the cylindrical roller 14. Further, the length (d) that is the difference when the radius of the concave portion is subtracted from the radius of the cylindrical roller 14 should be less than the effective flange height (h). |
