Dynamic pressure type bearing and spindle unit

Details Dynamic pressure type bearing and spindle unit Dynamic pressure type bearing and spindle unit

1990-04-18

1991-04-23

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384909, F16C 3206, F16C 3322

Patent

active

050095200

ABSTRACT:
A dynamic pressure type bearing is applicable to a precision mechanical equipment. The bearing includes a hollow inner cylinder to fit a rotatable shaft. The inner cylinder is made of a thermosetting resin containing a 5 wt % to 75 wt % heat treated phenol resin powder and a 5 wt % to 75 wt % silicon dioxide, the total content of the phenol resin powder and the silicon dioxide being 50 wt % to 80 wt %. A spindle unit includes the bearing and a spindle made of an alloy containing aluminum as a main element. The bearing has a superior wear resistance, frictional characteristic and molding accuracy of the inner cylinder. The superior frictional characteristic of the inner cylinder allows a relatively soft spindle to be used in a spindle unit.

REFERENCES:
patent: 3342667 (1967-09-01), Berlinghof, Jr.
patent: 4509803 (1985-04-01), Takenaka et al.
patent: 4774749 (1988-10-01), Furumura
patent: 4875263 (1989-10-01), Furumura
patent: 4934836 (1990-06-01), Tanaka et al.

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