Spherical roller bearing

A spherical roller bearing having an axially extending center axis and comprising:

• an outer ring including an outer race,
• an inner ring arranged concentrically with the outer ring and providing two inner races,
• a guide ring arranged concentrically with the inner ring and the outer ring, the guide ring having an outer base surface facing the outer ring, an inner base surface facing the inner ring and two lateral surfaces extending between the outer base surface and the inner base surface, and the distance in the axial direction between the two lateral surfaces decreases from the outer base surface towards the inner base surface,
• one set of cambered rollers on either side of the guide ring such that each set of rollers is associated with one inner race, and
• a cage structure arranged to retain the two sets of cambered rollers, the guide ring providing two circumferential guide ring sections, an inner guide ring section proximal to the inner ring and extending in the radial direction between the inner base surface and a predetermined point (P) arranged between the outer base surface and the inner base surface, an outer guide ring section being distal to the inner ring and extending in the radial direction between the predetermined point (P) and the outer base surface, wherein
• at least one through-opening extending between the two lateral surfaces is provided in the guide ring, the at least one through-opening being arranged in the inner guide ring section and wherein the cambered rollers of each set are distanced from the inner guide ring section and in contact with the outer guide ring section.