| 摘要 |
PROBLEM TO BE SOLVED: To provide a crown type holder capable of suppressing occurrence of out particles, a ball bearing, and a bearing unit.SOLUTION: A pocket 41A of a crown type holder 33A has a spherical first pocket surface 45 formed on an outer ring side in a bearing radial direction, and a cylindrical second pocket surface 46 formed on an inner ring side in the bearing radial direction, having a central line L, as a central axis, extending in a radial direction through a center O of a pocket 41, and having a tangent line L1, as a bus line, passing through a spherical contact point at the position of a pocket pitch circle diameter (PCD) with the first pocket surface 45 as a reference.SELECTED DRAWING: Figure 1 |
