Rotary bearing and gearbox

A gearbox, comprising:

• a rotary bearing, said rotary bearing comprising rolling elements;
• an outer bearing ring defining a bearing surface and an inner bearing ring defining a second bearing surface, with the inner bearing ring arranged in the outer bearing ring, wherein the inner bearing ring and the outer bearing ring are each provided with at least one receptacle through which, when the two receptacles are in a corresponding position with respect to each other, the rolling elements are insertable through a receptacle opening formed by the two receptacles into an anti-friction bearing between the second bearing surface of the inner bearing ring and the bearing surface of the outer bearing ring;
• and a guide ring arranged in at least one of the two receptacles between the receptacle opening and the rolling elements, said guide ring having an annular projection that runs axially and is configured for contacting the rolling elements;
• and
• a strain wave gear mounted in the rotary bearing, said strain wave gear having an input component, an elastic transmission component provided with external teeth, and a wheel provided with internal teeth, wherein the elastic transmission component when placed onto the input component is elliptically deformed by the input component in such a way that the external teeth of the transmission component engage with the internal teeth of the wheel in the opposing areas of a major axis of an ellipse formed by the elliptically deformed elastic transmission component.