A shaft transmission including at least one annulus having an inner gearing, a flexible spur gear arranged within the annulus and having an outer gearing, and a shaft generator for deflecting the spur gear in radial direction arranged within the spur gear, a torque-transmitting connection being created between the annulus and the spur gear at two opposing points of the spur gear, the shaft generator having a ring with an elliptical outer periphery and an elliptically shaped rolling bearing applied to the outer periphery, the rolling bearing having an outer ring (01), an inner ring (02) and two rows of rolling elements (03) arranged between the outer ring (01) and the inner ring (02).
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