| 摘要 |
PROBLEM TO BE SOLVED: To provide a needle bearing which can suppress a penetration oil amount by regulating an amount of a lubricant which tries to flow into a bearing.SOLUTION: A pair of annular parts 12, 12 comprise a pair of flange parts 14, 14 which extend to the inside of a radial direction from both end parts of the annular parts in an axial direction. Insides diameters D of the pair of the flange parts 14, 14 are set smaller than an inside diameter d of an axial intermediate part 13b of a column part 13 so that a clearance between internal peripheral faces of the flange parts 14, 14 and an external peripheral face of an inner ring member 30 becomes small. Furthermore, a plurality of screw grooves 31 are formed in a circumferential direction in a position opposing the internal peripheral face of the flange part 14 at a lubricant flow-in side at the external peripheral face of the inner ring member 30, and the screw grooves 31 are inclined to a direction of a rotating axial line X so that the lubricant is discharged to the outside when the inner ring member 30 rotates in a prescribed direction R. |
