Schaeffler Technologies Ag & Co .kg

Ina Walzlager Schaeffler Ohg

Stefan Hess

Peter Solfrank

Patrick Ullmann

Alexander Kern

Martin Scheidt

Dieter Goppelt

A bearing arrangement is provided having a shaft () with a bearing journal (), and a needle bearing () which is arranged thereon and has a cage () and needle rollers () accommodated in the latter. The bearing journal is provided with a hardened and precision-machined inner raceway () for the needle rollers and steps back radially in relation to axial shoulders () of adjacent shaft sections (), and the axial shoulders serve as run-on surfaces for the axial end sides () of the cage fitted between the axial shoulders. In this case, relief grooves () are provided, with the relief grooves extending on both sides of the inner raceway and each being dimensioned in such a manner that, over the entire circumferential region of the axial shoulders, the axial distance (D) thereof from each other is significantly larger than the inner raceway width (B) existing therebetween.

Bearing arrangement with a shaft and a needle bearing

A method of making a compensation shaft () out of a drop-forged shaft blank () is provided. The compensation shaft includes a shaft section () with a base body () and a rib () with a height H starting from the base body. The method includes separating the forging ridges () formed in the die () by trimming the forged shaft blank into a shape close to the final contour of the base body at trimming points, with the distance Sbetween these trimming points being substantially smaller than the distance Sbetween the forging ridges prior to separation.

Method of making a compensation shaft

Device for changing the opening and closing times of the gas-exchange

Growing community of inventors

Erlangen, Germany

Stefan Hess