Internally cooled roller

An internally cooled roller comprising

• 1. a roller body having an axis, an axially extending circumferential surface about the axis, a first end face extending substantially perpendicularly to the surface at one end thereof and a second end face, the one end of the circumferential surface having a reduced diameter,
• 2. a sleeve mounted on the circumferential surface of the roller body and surrounding the surface,
• a. the circumferential roller body surface and the sleeve defining therebetween a conduit for circulating a cooling fluid,
• 3. a flange fixed on the first end face along a plane extending parallel to the first end face, the flange having
• a. a first tubular member extending perpendicularly to the plane and projecting between the sleeve and the reduced diameter end of the roller body surface, the first tubular member defining a first annular seat with the sleeve and roller body surface, and
• b. a second tubular member of larger diameter than the first tubular member and extending concentrically thereabout, the tubular members defining a second annular seat therebetween, an end of the sleeve projecting into the second annular seat and being gripped thereby to prevent radial expansion of the sleeve end, and
• 4. a fluid-tight element mounted in the first annular seat and compressed by the projecting first tubular member, the gripped end of the sleeve preventing loosening of the fluid-tight element in the first annular seat.