This 518445 front outer wheel bearing (HM518445/10 tapered roller bearing) is a hub component for heavy-duty axle. It bears radial and axial combined loads together with the inner bearing, supports wheel weight and ensures smooth wheel rotation during driving and steering. It is manufactured from high-grade bearing steel with heat treatment, featuring high hardness, heavy load capacity and outstanding wear resistance. Separable design for easy disassembly and replacement. Every bearing passes dimension, hardness and clearance inspection before delivery. It is an essential replacement spare part for heavy truck wheel hub overhaul.