Fag Kugelfischer Georg Schafer

Alban Kronenberger

Oswald Bayer

An anti-friction bearing unit, particularly for use in an exhaust gas turbo charger. The unit includes two anti-friction bearings axially spaced apart from each other on a shaft. High temperature occurs on one end of the shaft. A precise mounting is provided which is not sensitive to high temperatures on at least the axial side exposed to high temperature. The bearing outer ring, which is the ring not subject to high temperatures, consists of one piece. The bearing inner ring is widened and divided into two sections at its axial middle. The axial portion of the divided inner ring which is exposed to high temperature consists of material of high heat resistance. The high heat resistance material is, for example, 80 MoCrV 42 16 (M 50) or X 102 CRMo 17 (AISI 440 C). An additional intermediate ring around the shaft at the high temperature and helps reduce heat transmission.

Anti-friction bearing for heat resistance

A magnetic liquid seal for an anti-friction bearing, the seal comprising an annular magnet and annular pole rings with respective supplies of magnetizable liquid radially between the pole rings and the inner ring. A pre-seal element with a lip extending toward the inner ring is supported on that axial side of the magnet that is toward the rolling element balls. A notch is defined in the inner race radially generally centered beneath the lip. The opposite axial side surfaces of the notch are obliquely outwardly inclined in the radially outward direction.

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Schweinfurt, Germany

Alban Kronenberger