55 mm x 120 mm x 29 mm KOYO 30311DJR tapered roller bearings

55x120x31.5 Bearing 2 in Shaft Size   offers a 55 mm x 120 mm x 29 mm KOYO 30311DJR tapered roller bearings selection of Genuine 55x120x31.5 Bearing at Wholesale SKF BEARING MANUFACTURING CO.,LTD. Prices. We 55 mm x 120 mm x 29 mm are a 55 mm x 120 mm x 29 mm KOYO 30311DJR tapered roller bearings Certified Parts Retailer

What is 30311DJR bearing cross reference？