Ring rolling device with axially fixed rolling bearings

A ring rolling device for enlarging a ring blank, comprising:

• a press element, an advancing arrangement, a rotatably mounted mandrel comprising a first end part, a second end part and a middle part therebetween, around which the ring blank can be mounted, and the mandrel is rotatably mounted with its first end part in a first rolling bearing and with its second end part in a second rolling bearing, such that the middle part of the mandrel lies free for the mounting of the ring blank, and wherein the mandrel is movable by the advancing arrangement towards the press element and away from the latter again, wherein a roll gap which decreases in size, and in which the ring blank is rolled, is formed between the mandrel and the press element, wherein the second rolling bearing is arranged axially fixed in the advancing arrangement, and the mandrel is mounted so as to be axially movable relative to the second rolling bearing, such that the second end part of the mandrel can be pulled out of the second rolling bearing or pushed into the latter, wherein the first rolling bearing is also arranged axially fixed in the advancing arrangement, and the mandrel is mounted so as to be axially movable relative to the first rolling bearing.