30318-A Single Row Tapered Roller Bearing 90x190x46.5mm Heavy Load For Heavy Truck Axle Construction Machinery Product Overview 30318-A is metric single-row tapered roller bearing with upgraded A-type internal geometry, overall dimension 90×190×46.5mm. With large contact angle and separable inner & outer rings, it efficiently bears heavy combined radial and one-way axial loads. Made of premium GCr15 bearing steel, it features outstanding rigidity, wear resistance and stable