Method for assembling paired angular contact ball bearings

The invention discloses a method for assembling paired angular contact ball bearings, which comprises the following steps of: firstly, measuring the groove contact diameter of a bearing inner ring or a bearing outer ring to be assembled under the action of preload; secondly, the protruding amount is converted into the groove contact diameter difference according to the difference relation between the bearing protruding amount and the groove contact diameter of the bearing inner ferrule and the bearing outer ferrule; and finally, an inner sleeve ring, an outer sleeve ring or an assembly ball which can be correspondingly assembled with the bearing outer sleeve ring or the bearing inner sleeve ring is selected according to the groove contact diameter difference. According to the active assembling method, the contact point groove diameter of the bearing inner ring and the bearing outer ring is measured under the preload effect, grouping assembling is carried out, the contact angle of the bearings after batch asse