| 摘要 |
PROBLEM TO BE SOLVED: To enhance bearing performance by accurately positioning an end surface of a hub forming a thrust bearing clearance relative to a shaft member in an axial direction. SOLUTION: The thrust bearing clearance is formed by an end surface 31a of a core metal 31, and the end surface 31a of the core metal 31 is abutted on a shoulder surface 2c of the shaft member 2. Thereby, since the thrust bearing surface can be positioned, with high precision, relative to the shaft member 2 in the axial direction, high accuracy of the clearance width of the thrust bearing clearance, reduction of rotation torque or miniaturization of the bearing device can be attained. COPYRIGHT: (C)2008,JPO&INPIT
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