Static pressure gas bearing spindle assembly

Details Static pressure gas bearing spindle assembly Static pressure gas bearing spindle assembly

1995-02-01

1996-09-10

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384100, F16C 3206

Patent

active

055539483

ABSTRACT:
A static pressure gas bearing spindle assembly which can prevent any dust contained in the compressed air used to support the spindle from sticking to the workpiece placed on the work-support table. The housing has a sleeve mounting hole in which are mounted a chucking sleeve and a bearing sleeve. A gas exhaust space is defined between these sleeves. This space communicates with the outer environment through a gas exhaust passage formed in the housing. The spindle carries at its top end a work-supporting table. The chucking sleeve is formed with a suction passage that communicates with a workpiece suction recess formed in the table. Compressed gas is supplied into a radial bearing gap formed between the spindle and the bearing sleeve, and exhausted into the outer environment through the gas exhaust space and the passage. Even if part of the compressed gas flow into the space between the chucking sleeve and the spindle, it can be instantly sucked into the suction passage. Thus, compressed gas will never flow into the space over housing.

REFERENCES:
patent: 4474483 (1984-10-01), Suzuki et al.
patent: 4822182 (1989-04-01), Matsushita
patent: 5239892 (1993-08-01), Sakai

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