Hybrid spindle bearing

Details Hybrid spindle bearing Hybrid spindle bearing

1996-09-11

1998-04-14

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 384227, 384228, 409231, 409233, 409234, 408 8, H02K 708, H02K 709

Patent

active

057396078

ABSTRACT:
A machine tool spindle is supported at its spindle nose in a front, rolling element mechanical anti-friction thrust and radial support bearing means. The middle and rear end of the spindle is supported in a magnetic radial rear bearing and further supported at a generally mid-position of the spindle by magnetic radial mid bearing. The two magnetic radial bearings provide radial suspension of the spindle and permit the spindle to slide freely. A spindle flange is axially forced by a magnetic axial thrust bearing to vary the pre-load of the mechanical anti-friction thrust and radial support bearing.

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