Specified for applications where a high degree of corrosion and wear resistance is desired,non-plated aluminum bearing alloys contain silicon, which will actually polish the shaft journal in use. This material is ideal for handling thrust loads and is often used for the flange bearing in applications where alternate materials are specified for the rest of the bearing set. Aluminum has proven durability for street use, and is recommended for limited high performance applicability and conformability required in most applications. Suitable for street, heavy duty and moderate competitive use.