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IDLER ROLL WITH DOUBLE PRESS BEARINGS AND SPLIT SHAFT

IP.com Disclosure Number: IPCOM000025792D
Original Publication Date: 1988-Feb-29
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 78K

Publishing Venue

Xerox Disclosure Journal

Abstract

Difficulties have been encountered in mounting rollers rotatably with pairs of roller bearings to a central shaft. That is, to provide a hollow cylindrical roller with roller bearings at opposite ends, such that the outer races of the bearings engage the inside diameter of the roller at its opposite ends with a press fit, and the inside diameters of the inner races of these roller bearings are press fitted to the central shaft. These difficulties include the difficulties in press fitting both the inner and outer races of a bearing, which tends to overcompress the roller bearing and reduce its operating clearances to the point where bearing failure can occur. Another difficulty is the destruction of bearings during installation because of attempting to press against both both the inner and outer races during press fittings of two bearings simultaneously. However, it is desirable, because when this assembly is completed, because of the positive and metal to metal press fittings, there is no possibility of chucking between the shaft and the other race in the inner races that could cause noise, fretting or wear problems.

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XEROX DISCLOSURE JOURNAL

IDLER ROLL WITH DOUBLE PRESS BEARINGS AND SPLIT SHAFT Steve S. Counoupas

Proposed Classification
U.S. C1.355/14SH Int. C1. G03g 15/00

Difficulties have been encountered in mounting rollers rotatably with pairs of roller bearings to a central shaft. That is, to provide a hollow cylindrical roller with roller bearings at opposite ends, such that the outer races of the bearings engage the inside diameter of the roller at its opposite ends with a press fit, and the inside diameters of the inner races of these roller bearings are press fitted to the central shaft. These difficulties include the difficulties in press fitting both the inner and outer races of a bearing, which tends to overcompress the roller bearing and reduce its operating clearances to the point where bearing failure can occur. Another difficulty is the destruction of bearings during installation because of attempting to press against both both the inner and outer races during press fittings of two bearings simultaneously. However, it is desirable, because when this assembly is completed, because of the positive and metal to metal press fittings, there is no possibility of chucking between the shaft and the other race in the inner races that could cause noise, fretting or wear problems.

This problem was alleviated by dividing the central shaft into two mating parts. The end of one part of the shaft is telescopicaly mounted inside the roller inside an enlarged portion of the en...