Expander roller

A roller for a machine which processes a web of fibrous material, said roller comprising:

• two support core bearing arrangements;
• a support core including two end regions each of which is braced respectively by one of said support core bearing arrangements, each said support core bearing arrangement defining a radially extending center plane;
• two outer covering bearing arrangements;
• and
• an outer covering including an axially central region and two end regions, said outer covering being braced, in said axially central region, in a radially fixed manner relative to said support core, each said end region of said outer covering being braced in a radially displaceable manner relative to said support core respectively by one of said outer covering bearing arrangements, each said outer covering bearing arrangement defining a radially extending center plane, said radially extending center plane of each said support core bearing arrangement and said radially extending center plane of each said outer covering bearing arrangement lying axially within said outer covering.