A unitized piston is a complete, self-contained piston, bearing, and seal in one unit that can solve difficult assembly problems and may be used as a cost-effective alternative to a traditional piston assembly with separately fitted seals and bearings. The materials used for a unitized piston are designed to handle a broad range of application parameters. It is constructed using four components: a high-strength steel body, a non-metallic bearing, a rubber loading ring, and a filled PTFE seal ring. The piston body is machined to exact dimensions. The non-metallic bearing material is molded to the piston using a special proprietary process. It is then machined to the final precise OD dimension and the seal is installed. It is supplied ready for use in a cylinder.