Rolling bearing cage and method for mounting a rolling bearing cage

Embodiments relate to a rolling bearing cage (1, 40). The rolling bearing cage has at least one extending in the circumferential direction of the first side ring (2, 41, 52). The first side ring (2, 41, 52) includes an opening point (3, 8, 58). This is adapted to the side ring (2, 41, 52) to a mounting of the side ring (2, 41) to open, so that a periphery of the side ring (2, 41, 52) can be widened.