| 摘要 |
PROBLEM TO BE SOLVED: To prevent a back face side part of a pocket from interfering with a groove shoulder part, even if the groove shoulder part of a raceway groove of a deep groove ball bearing is heightened, without shallowing embracement of a ball in the pocket. SOLUTION: A back face part 7b of the pocket 7 is prevented from interfering with the groove shoulder part, even if the groove shoulder part of the raceway grooves 2a and 3a of the deep groove ball bearing 1 is heightened, without shallowing the embracement of the ball 4 in the pocket 7, by reducing a height dimension H<SB>B</SB>in the radial direction of the back face part 7b of the pocket 7 positioned outside in the axial direction more than the raceway grooves 2a and 3a of inner-outer races 2 and 3 of an annular body for forming a crown-shaped cage 5, more than a height dimension H<SB>A</SB>in the radial direction of a central part in the axial direction of the pocket 7 positioned in a central part of the raceway grooves 2a and 3a. COPYRIGHT: (C)2009,JPO&INPIT
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