Thermally conductive spindle support shaft

Details Thermally conductive spindle support shaft Thermally conductive spindle support shaft

1998-02-26

2000-06-06

Letscher, George J.

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G11B 1702

Patent

active

06072661&

ABSTRACT:
A highly thermally conductive spindle support shaft is composed of a metal matrix composite of aluminum (Al) and silicon carbide (SiC) of substantially 53% to 63% silicon carbide by volume. The spindle support shaft supports a magnetic disk file spindle by means of rotatable bearings, replacing a steel shaft. The spindle support shaft increases the heat transfer from, and reduces the temperature of, the rotatable bearing, and matches the coefficient of thermal expansion of a conventional steel shaft, thereby maintaining the bearing preload through a range of temperatures.

REFERENCES:
patent: 4735923 (1988-04-01), Sugawara et al.
patent: 5850329 (1998-12-01), Sullivan

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