30317DU Single Row Tapered Roller Bearing 85x180x44.5mm Open Type For Truck Wheel Hub Axle Product Overview 30317DU is high-load metric single-row tapered roller bearing complying with ISO & NTN industrial specifications, overall dimension 85×180×44.5 mm, widely applied in commercial vehicles and heavy machinery drive systems. Manufactured from high-hardness quenched GCr15 bearing steel, equipped with stamped steel cage to evenly guide tapered rollers. D upgraded roller