The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 15, 1990
Filed:
Dec. 20, 1988
Erwin Junker, 7618 Nordach, DE;
Other;
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.