Device and an axle for rail vehicles

A device for rail vehicles comprising a predominantly hollow axle tube extending along a longitudinal direction (LR) and ending in a first wheel flange, and a wheel support extending opposite to the longitudinal direction (LR), comprising a wheel bearing, a second wheel flange and a mandrel as a cone, wherein the second wheel flange, the first wheel flange and a wheel arranged therebetween with a wheel hub are connected to each other via a flange connection, and wherein the mandrel as a cone is inserted from the wheel holder in a positive-locking manner opposite to the longitudinal direction (LR) through the wheel hub of the wheel into the interior of the axle tube and ends at the fastening element, which is arranged and cast into the axle tube and is connected thereto.