SEALED TYPE RECORDING DISK DRIVING DEVICE, CLAMP FOR RECORDING DISK DRIVING DEVICE, SPACER, AND SPINDLE MOTOR

PROBLEM TO BE SOLVED: To provide a recording disk driving device for suppressing rotation fluctuation relatively easily. SOLUTION: The sealed type recording disk driving device 11 is provided with a thrust bearing 25 for receiving the bottom end of a rotary shaft 37. A hub 38 for regulating a top surface lower than the top end of the rotary shaft 37 is fixed to the rotary shaft 37. The thrust bearing 25 is received by a casing 12. A gasket is held between the casing 12 and the thrust bearing 25. When housed in the casing 12, a pressing force is applied to the top end of the rotary shaft 37. The pressing force is transmitted from the bottom end of the rotary shaft 37 to the thrust bearing 25. The gasket is crushed between the thrust bearing 25 and the casing 12. The top surface lower than the top end of the rotary shaft 37 is defined in the hub 38. Thus, the pressing force is received by the rotary shaft 37. Positional accuracy is maintained between the rotary shaft 37 and the hub 38. COPYRIGHT: (C)2009,JPO&INPIT