## Namura NA-40005R Piston Rings - For 82.95mm, 83.00mm Pistons Often overlooked, piston rings are a crucial component affecting piston performance, engine efficiency, and longevity. The Namura NA-40005R piston rings, designed for 82.95mm and 83.00mm pistons, guarantee the highest quality and precision. Namura is known for its attention to detail and the use of advanced technologies, resulting in reliability and long product life. ### Materials and Technologies The materials used in the production of piston rings are crucial for their performance. Namura selects materials and technologies individually for each application, considering the type of cylinder sleeve, its coating, engine size, and piston stroke (2 or 4 stroke). This allows for optimal matching of the rings to the operating conditions. ### Compression Rings Made of highly ductile cast iron or stainless steel alloy, the compression rings are characterized by excellent wear resistance and provide a tight seal. Additionally, depending on the model, chrome, phosphate, and nitride coatings are used to meet the demands of the specific engine. ### 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. Their task is to effectively scrape excess oil, preventing it from entering the combustion chamber. By choosing Namura NA-40005R piston rings, you invest in the reliability and longevity of your engine.