Rolling unit for deep-rolling the running surfaces of rail vehicles

A rolling unit for machining by a deep rolling process the wheel running surfaces of wheelsets for rail vehicles to increase the service life of the wheel running surfaces, the rolling unit comprising:

• a base body;
• a first support arm extending vertically upwardly from the base body from a first proximal end to a first distal end, the support arm comprising a female-threaded aperture near the first distal end;
• a receptacle comprising a shaft having an unthreaded portion and a male-threaded portion at a distal end thereof, the receptacle supported by the first support arm and fixed in position to the first support arm by engagement of the male-threaded portion with the female-threaded portion;
• a bearing mounted on the unthreaded portion of the shaft of the receptacle;
• and
• a work roller mounted on the bearing;
• wherein the work roller comprises a working surface comprising at least a first arcuate surface portion and a second arcuate surface portion, wherein the first arcuate surface portion comprises a first radius having a first value and the second arcuate surface portion comprises a second radius having a second value which is different than the first value.