Spindle for gas bearing of a rapidly rotating tool

Details Spindle for gas bearing of a rapidly rotating tool Spindle for gas bearing of a rapidly rotating tool

1997-09-16

1998-09-01

Footland, Lenard A.

Bearings

Rotary bearing

Fluid bearing

384114, 384448, 3849071, F16C 3206

Patent

active

058000682

ABSTRACT:
A spindle for a gas bearing of a rapidly rotating tool, including a spindle housing, a bushing arranged in the housing, at least one ceramic bearing pressed into the bushing over substantially the entire length thereof and a rotating shaft gas-supported in the housing in the axial and radial direction by the bearings such that a gap remains between the shaft and the bearings. In order to control the narrowing of the gap formed between the shaft and the bearings, the material and thickness of the bushing and bearing are selected such that the product of elasticity module and wall thickness of the bushing is at least about 1.8 times greater than the product elasticity module and wall thickness of the bearing.

REFERENCES:
patent: 4239300 (1980-12-01), Adler
patent: 4277113 (1981-07-01), Heshmat
patent: 4668107 (1987-05-01), Showalter

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