Four-point angular contact ball bearing

The utility model relates to a bearing, in particular to a four-point angular contact ball bearing, which comprises an outer ring, an inner ring, a retainer and a rolling body, the outer ring and the inner ring are coaxially arranged, the inner ring is positioned in the outer ring, an inner raceway is arranged on the inner circular surface of the outer ring, an outer raceway is arranged on the outer circular surface of the inner ring, and the outer raceway and the inner raceway are oppositely arranged. The rolling bodies are movably installed on the retainer, the multiple rolling bodies are arranged in an annular array mode and further movably located between the inner raceway and the outer raceway, and a plurality of side oil grooves are formed in the inner end face of the inner ring and communicated with the inner circle face of the inner ring and the outer raceway respectively. According to the four-point angular contact ball bearing provided by the utility model, the side oil grooves are additionally arra