| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a holder for a roller bearing with a large load capacity in light weight and a manufacturing method of this holder, by molding a pipe- shaped material by bulging work into an annular member having a prescribed sectional shape, and forming a window for roller holding in the annular member, in this invention. SOLUTION: A plurality of windows 10 for charging with roller are formed by punching in an annular member formed by bulging work from a thin metal- made pipe-shaped material. A pillar part 3 of a holder 1 left to be formed in a barrel part, when the window 10 is formed, comprises a pillar central part 4 formed in the axial direction center, pillar end parts 6 integrally connected to a pair of annular side parts 2, and pillar sloped parts 8 integrally connecting the pillar central part 4 and the pillar end parts 6. Thickness of the annular side part 2 is formed in thin thickness similar to thickness of the pillar part 3, and the holder 1, reduced in weight, displays good rotational quality.</p> |
