Teikoku Piston Ring Co., Ltd. is a distinguished Japanese manufacturer specializing in the production of high-quality piston rings for a variety of engines, including those found in automobiles, motorcycles, and industrial machinery. Established in 1936, the company boasts a rich history and a commitment to technological excellence.

Teikoku's piston rings are crafted with precision and engineered to meet the stringent demands of modern engines. Leveraging advanced materials such as cast iron and alloy steel, coupled with proprietary coatings, Teikoku's piston rings deliver enhanced durability, wear resistance, and efficient heat dissipation.

The company's piston rings are thoughtfully designed to optimize engine performance. They play a pivotal role in ensuring proper compression sealing, reducing friction, and contributing to improved fuel efficiency. Teikoku offers a diverse range of application-specific rings, catering to gasoline engines, diesel engines, and various industrial applications.

With a keen focus on research and development, Teikoku Piston Ring Co., Ltd. remains at the forefront of piston ring technology. The company explores innovative materials, coatings, and manufacturing techniques to continually enhance the performance and longevity of their products.

In summary, Teikoku Piston Ring Co., Ltd. is synonymous with precision engineering and a commitment to excellence in the realm of piston rings. Their products reflect a harmonious blend of tradition, innovation, and a dedication to meeting the evolving needs of the automotive and industrial sectors.

Piston Rings play the role of controlling lubricating oil, and because they are used in a high-speed motion part, they are critical functional parts demanding high precision and high durability.

Gasoline engine Piston Rings
As engine fuel efficiencies improve, a critical challenge is to make engines lighter, with reduced mechanical losses. To reduce the friction losses around pistons, where approximately 40 to 50% of total engine friction losses occur, there is an increase in "thin Piston Rings for compactness" and "low tension Piston Rings". In addition to thin, low tension Piston Rings, we offer TPR's unique new technology.

Typical piston ring composition
3-part composition of TOP, 2ND and OIL rings, the OIL ring is a 3-piece type.

Introduction to key technology

• No hydrogen included/ta-C DLC coating
• a-C:H DLC coating (supports aluminum alloy cylinder direct sliding)
• Outer circumference upper/Lower asymmetric side rail (3-piece OIL ring)
• Tx-3 deposit resistance-improving spacer (3-piece OIL ring)

Diesel engine Piston Rings
Emissions regulations/high output/long-life/fuel efficiency is being demanded for diesel engines. Piston Rings are being set with a focus on long durability and reliability, as well as oil consumption reduction and friction loss reduction.

Find out more at their Official Site : https://www.tpr.co.jp/tp_e/products/powertrain/pistonring/