Support bearing for a roll (33) for immersion in liquid metal, comprising
an internal rotating bush (31) fitted coaxially on a pin (32) at the end
of the roll (33), and rotating inside an external bush (34) fixed to a
supporting arm (37) of the roll (33). The first bush (31) is provided
with an axial helical groove (39) on its outer surface and the second
bush (34) is provided with a toroidal-shaped convex outer surface to
allow rotation without friction inside the cylindrical ring of the
supporting arm (37).