Custom cast iron piston ring
Our custom cast iron piston rings are precision-manufactured to meet the exact tolerances required by engine, compressor, and pump applications. Produced from high-grade grey iron and ductile iron, each ring is machined to your technical drawing with strict dimensional control on gap clearance, ring thickness, and outer diameter. We support OEM and ODM orders across a wide range of bore sizes, with sample production available before mass order commitment.
*Provide your application requirements—such as stress conditions, materials, size range, and even product name. We are always available for customization, so please contact us directly.
Introduction
Why Choose Our Cast Iron Piston Rings?
Precision Machined to Drawing — Every piston ring is CNC-machined to your exact specifications, including bore diameter, ring width, ring thickness, and end gap tolerance, ensuring drop-in compatibility with your engine or compressor assembly.
Grey Iron & Ductile Iron Options — Grey iron offers excellent wear resistance and self-lubricating properties ideal for standard engine applications, while ductile iron provides higher tensile strength for high-pressure compressor and pump environments.
Superior Sealing Performance — Our piston rings are engineered to minimize blow-by and oil consumption, maintaining consistent cylinder pressure across extended service cycles.
Wide Bore Size Range — We manufacture piston rings from small-bore single-cylinder engines to large-bore industrial compressors and marine diesel engines, fully customized to your bore diameter.
Surface Treatment Available — Phosphating, chrome plating, and nitride coating options available to enhance wear resistance and extend service life under high-temperature, high-pressure conditions.
Specifications
Category Specifications & Technical Details Product Name Custom Cast Iron Piston Ring Scope of Services • Custom Piston Ring Manufacturing (OEM/ODM)
• Prototype Development & Small Batch Production
• Specialized Design for High-Pressure/High-Temperature environments
• Reverse Engineering based on samples or drawings
• Technical Support for Material SelectionMaterials • Grey Cast Iron (HT200, HT250, HT300)
• Ductile/Nodular Iron (QT400, QT500, QT600, QT700)
• Alloy Cast Iron (Chromium, Molybdenum, Nickel-Alloyed)
• High-Resistance Special Iron Alloys for specialized industrial useMachining Processes • High-Speed CNC Turning & Milling
• Double-Disc Grinding (for precise thickness & parallelism)
• Specialized Ring Gap Cutting & Profiling
• Honing and Lapping for high surface finish
• Heat Treatment (Stress Relief & Hardening)Target Industries • Automotive (Internal Combustion Engines)
• Marine & Locomotive Engines
• Air & Gas Compressors
• Hydraulic & Pneumatic Systems
• Agricultural and Construction Machinery
• Power Generation EquipmentSurface Treatment • Phosphating (Anti-friction/Anti-rust)
• Hard Chrome Plating (Wear Resistance)
• Nitriding (Liquid/Gas) for Surface Hardness
• Molybdenum Spraying (High Temperature Scuff Resistance)
• PVD Coating (CrN, TiN, DLC for low friction)
• Black Oxide & OilingInspection Facilities • CMM (Coordinate Measuring Machine)
• Profile Projector & Laser Scanning
• Roundness & Cylindricity Testers
• Digital Roughness & Hardness Testers (Rockwell/Brinell)
• Metallographic Microscope (Structure Analysis)
• Light Leakage Testing for Sealing IntegrityOur Advantages 1. Superior Wear Resistance: Optimized material composition for long service life.
2. High Precision: Micrometer-level tolerance control for optimal gas sealing.
3. Thermal Stability: Maintains tension and shape under extreme heat.
4. Quick Turnaround: Flexible production lines for both custom one-offs and large orders.
5. Quality Assurance: 100% inspection to ensure leakage-free performance.
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I don't have complete drawings, can I send inquiry?
Yes, we can help you analyze based on your description, samples and photos.
I am not sure if you can do my parts?
Most of our customers come to us because “others say they can’t do it”.
Are you a factory or a trader?
We are a factory and have a project management team that can handle the technology, cost and delivery at the same time.
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