Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1997-09-05
1999-04-20
Renner, Craig A.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
310 67R, 310 90, 360 9702, G11B 1920, G11B 3314, H02K 5173, F16C 35067
Patent
active
058962425
ABSTRACT:
A spindle motor assembly includes a hub, a motor, and a bearing cartridge having a plurality of bearing balls disposed between a sleeve and a shaft. The shaft includes a cylindrical hollow portion which is attached to a cylindrical protrusion portion of the hub to provide a stable attachment between the hub and shaft without increasing the height of the spindle motor assembly. Grooves are formed on the outer peripheral surface of the cylindrical protrusion portion to alleviate stress between the hub and shaft resulting from thermal expansion.
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Albrecht David W.
Matsuda Hiroshi
Takahashi Keishi
International Business Machines - Corporation
Lee Monica D.
Martin Robert B.
Renner Craig A.
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