Fag Kugelfischer Georg Schafer

Gerhard Braune

Horst Voll

Reinhard Hock

A high precision, two-row ball bearing wherein the inner races of the two rows are worked into the shaft and there are respective outer rings around the rows of balls. A spacer bushing is axially disposed between the outer rings. The spacer bushing is of a single piece with an axial slot extending along its length. The slot has a width approximately equal to the diameter of the shaft. The center of the diameter of the bore of the spacer bushing is offset from the center point of the diameter of the external periphery of the spacer bushing, whereby the spacer bushing is radially thinnest opposite the axial slot and thickens toward the slot for balancing the mass of the spacer bushing with the material removed from the slot. A housing bushing surrounds the spacer bushing and the outer rings.

Spacer bushing for two-row ball bearing

In a bearing assembly supporting the free end of a drive shaft, a carrier for enabling axial motion of the assembly to accommodate thermal expansion of the shaft during extended power-transmission operations has a meandering cross-section with a thin U-shaped central or middle section and a pair of thick-walled Z-shaped peripheral sections. The sections are annular and together define a central wide groove and a pair of flanking narrow grooves. The inner Z-shaped section is attached to the outer race of a bearing whose other race is rigid with the shaft, while the outer Z-shaped section is fastened to a housing. The thin walls of the central carrier section permits a limited axial movability of the bearing assembly, while the annular shapes of the carrier sections, in particular the thick sections, inhibit axial or transverse motion of the shaft. A radial face of the inner Z-shaped carrier section defines, together with an inner surface of the housing, a gap which receives oil from a lubricating sump in the housing, the oil in the gap serving to damp axial shocks and vibrations in the shaft arising from the load.

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Euerbach, Germany

Gerhard Braune