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The upgraded version of the reinforced bearing uses the latest materials for the retainer and middle retaining ring. The steel plate has been thickened and nitrided, and the internal structure has reached the strongest toughness. The surface of the retainer and middle retaining ring is treated with titanium infiltration, making the bearing as pure as fire. The rolling element and ring are quenched with salt bath bainite, and the internal structure of the bearing is compact. The external guiding effect of the middle retaining ring can make the bearing withstand stronger vibration. The service life of bearings is more than three times that of ordinary bearings.