WG2203100005 rear auxiliary box lower cone hub is an important transmission part of Sinotruk heavy truck gearbox auxiliary box assembly. It meshes with the relevant gear components inside the auxiliary box and undertakes power transmission and torque transfer tasks during vehicle running. The product is made of high-quality alloy steel and processed by precision turning, grinding and heat treatment. It features high surface hardness, strong wear resistance and good impact resistance, which can adapt to heavy load, frequent start and shift working conditions of heavy trucks. Strict dimensional tolerance inspection and hardness test are carried out for every workpiece before delivery to ensure accurate gear meshing and stable power transmission. It can be directly replaced after the original part is worn or damaged. We maintain sufficient inventory and stable bulk supply for repair workshops, fleet operators, auto spare parts dealers and global cross-border export customers.