Bearing system for high speed spindles of machine tools

Details Bearing system for high speed spindles of machine tools Bearing system for high speed spindles of machine tools

1988-12-20

1990-05-15

Hannon, Thomas R.

Bearings

Rotary bearing

Antifriction bearing

384549, F16C 1900, F16C 1954

Patent

active

049264931

ABSTRACT:
A bearing system for high speed spindles of machine tools, particularly grinding machines, comprises at least one front bearing arranged close to the spindle flange and a rear bearing, which in each case have three support rolls acting equiangularly on the spidle and having a larger diameter than the latter. In order to obtain a clearance-free bearing system in the case of speeds up to 150,000 rpm satisfying the precision requirements made on precison machine tools, the support rolls are fixed and mounted with roll journals provided on either side in small diameter precision ballbearings in the casing receiving the spindle and the support rolls. The spindle has as bearing surfaces conical portions inclined against one another and with resepct to which the axis of the support rolls is parallel. At least the support rolls of one bearing are adjustable axially parallel to the spindle for prestressing or pretensioning purposes.

REFERENCES:
patent: 1364675 (1921-01-01), Almfelt
patent: 2828938 (1958-04-01), Roesch et al.
patent: 4149365 (1979-04-01), Kobayashi et al.
patent: 4249784 (1981-02-01), Ichikawa

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