Structural unit, universal joint bearing and assembling procedure

A structural unit for assembly to a trunnion of a universal joint bearing, the structural unit comprising:

• a cup,
• a sealing ring fixed to the cup,
• a metal ring disposed on the sealing ring and having a first end,
• a shield connected to the cup in a state in which the structural unit is not assembled to the trunnion,
• the cup comprises a bottom and, on an opposite axial cup side, a radially extending axial portion,
• the sealing ring comprises a first end and at least one sealing lip that points in a direction with an axial component pointing towards the bottom;
• and
• wherein the first end of the metal ring and the radially extending portion of the cup abut a first side of a portion of the sealing ring;
• the shield abutting a second side, opposite from the first side, of the portion of the sealing ring.