## Namura NA-30002R Piston Rings - Reliability and Performance for Your Engine Often overlooked, piston rings are a crucial component influencing piston performance, engine efficiency, and durability. The Namura NA-30002R piston rings, designed for pistons with diameters of 89.96mm, 89.97mm, and 89.98mm, guarantee quality and precision. Namura is known for its attention to detail and the use of advanced technologies, which translates into reliability and long product life. ### Materials and Construction The materials used in the production of piston rings are crucial for their performance. Namura designs its rings for specific applications, taking into account the type of cylinder sleeve, its coating, engine size, and stroke (2 or 4 stroke). All these factors influence the selection of the optimal material composition that meets the operating environment's requirements. ### Compression Rings Namura NA-30002R compression rings are made of highly ductile cast iron or stainless steel alloy. Both materials offer excellent wear resistance and provide a tight seal. Depending on the application, the rings can also be coated with chrome, phosphate, or nitride, further increasing their durability and corrosion resistance. ### Oil Rings Oil rings consist of three separate components: two scraper rails made of highly ductile cast iron or stainless steel alloy, coated with chrome, nitride, or phosphate, and a single expander ring made of stainless steel. This design ensures efficient scraping of excess oil and maintains optimal lubrication levels, contributing to a longer engine life. By choosing Namura NA-30002R piston rings, you invest in quality and reliability, which translates into trouble-free engine operation for a long time.