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Product Advantage
1. High-Strength Alloy Material
The AlSn20Cu main bearing is manufactured from a high-tin aluminum-copper alloy, providing excellent strength and compressive resistance. It maintains structural stability under heavy-load marine diesel engine conditions, preventing deformation and ensuring long-term reliable operation of the crankshaft.
2. Precision Machining & Surface Optimization
CNC precision machining combined with specialized surface treatments such as tin plating or shot peening ensures a smooth surface with Ra 0.4–0.8 μm. This guarantees tight fit, reduces friction, stabilizes oil film, and minimizes mechanical wear.
3. Excellent Corrosion Resistance
Designed for marine applications, the alloy resists oxidation and degradation in saltwater and humid environments, ensuring long-term reliability and safety of the vessel’s power system.
4. Efficient Heat Dissipation & Low Friction
The material composition and precise fit help evenly distribute frictional heat, maintain stable lubrication, reduce energy loss and vibration, and enable smoother and more efficient engine operation.
Technical Parameters
| Product Parameters | Content |
| Product Name | Main Bearing |
| Application | Marine Bearing |
| Material | AlSn20Cu |
| Surface Treatment | Tin Plating/Phosphating/Shot Peening |
| Weight | 0.5-2KG (Depending on size customization) |
| Tolerance Class | IT:6-7 |
| Minimum Order Quantity | ≥10EA |
| Surface Roughness | RA:0.4-0.8 |
| Processing Technology | CNC Turning/Precision Grinding/Drilling |
| Production Volume | Over 100 Pieces Per Month |
| Heat Treatment | Solution Treatment |
| Hardness | HB55-85 |
| Testing Method | CMM |
Product Uses
1. Crankshaft Main Support for Marine Engines
The AlSn20Cu main bearing is designed to support marine crankshafts under high RPM and continuous load. Its precise fit and stable oil film reduce friction and vibration, improving fuel efficiency and overall engine performance.
2. Long-Term Continuous Operation for Ocean-Going Vessels
Ideal for cargo ships, fishing vessels, and transport ships during extended voyages. The bearing maintains dimensional stability under high load and impact conditions, extending engine life and minimizing maintenance frequency.
3. High Salt and Humid Marine Conditions
The AlSn20Cu alloy provides excellent corrosion resistance, enabling long-term operation in saltwater and high-humidity environments. It prevents oxidation and wear, ensuring a reliable and stable marine power system.
4. Engineering and Tugboat Power Systems
Suitable for engineering ships, harbor tugs, and offshore construction vessels. The bearing performs reliably under frequent start-stop cycles and heavy-load operations, enhancing engine responsiveness and power transmission efficiency.
Product Operate Guide
Before installing the AlSn20Cu main bearing, ensure the crankshaft and bearing housing are clean and free of debris. Use proper alignment and pressing tools to insert the bearing evenly without excessive force. Apply the recommended marine engine lubricant to reduce initial friction. After installation, run the engine at low RPM first to check oil flow and bearing alignment. Regular inspections during operation help maintain smooth rotation, prevent premature wear, and ensure long-term reliable performance.
Product Video
FAQ
1.Q: Do you offer customized pipe fittings?
A: Yes, we support OEM/ODM customization. Please provide detailed drawings, and we can manufacture according to specific material, size, weight, surface treatment, and other requirements.
2.Q: What quality certifications does the product have?
A: Our products have multiple quality certifications, including ISO 9001 quality management system certification to ensure strict process control and consistent product quality. Additionally, CE certification and other relevant certificates can be provided upon customer request to meet various market and industry compliance standards.
3.Q: What is your minimum order quantity?
A: The minimum order quantity for customized products is typically 10 pieces. The exact quantity can be adjusted flexibly based on product model, specifications, material, and processing requirements.
4. Q: What should be considered during installation?
A: Ensure the crankshaft and bearing housing are clean before installation. Use proper pressing or alignment tools to insert evenly without excessive force. Apply recommended lubricant to reduce initial friction and ensure smooth operation.
Product Advantage
1. High-Strength Alloy Material
The AlSn20Cu main bearing is manufactured from a high-tin aluminum-copper alloy, providing excellent strength and compressive resistance. It maintains structural stability under heavy-load marine diesel engine conditions, preventing deformation and ensuring long-term reliable operation of the crankshaft.
2. Precision Machining & Surface Optimization
CNC precision machining combined with specialized surface treatments such as tin plating or shot peening ensures a smooth surface with Ra 0.4–0.8 μm. This guarantees tight fit, reduces friction, stabilizes oil film, and minimizes mechanical wear.
3. Excellent Corrosion Resistance
Designed for marine applications, the alloy resists oxidation and degradation in saltwater and humid environments, ensuring long-term reliability and safety of the vessel’s power system.
4. Efficient Heat Dissipation & Low Friction
The material composition and precise fit help evenly distribute frictional heat, maintain stable lubrication, reduce energy loss and vibration, and enable smoother and more efficient engine operation.
Technical Parameters
| Product Parameters | Content |
| Product Name | Main Bearing |
| Application | Marine Bearing |
| Material | AlSn20Cu |
| Surface Treatment | Tin Plating/Phosphating/Shot Peening |
| Weight | 0.5-2KG (Depending on size customization) |
| Tolerance Class | IT:6-7 |
| Minimum Order Quantity | ≥10EA |
| Surface Roughness | RA:0.4-0.8 |
| Processing Technology | CNC Turning/Precision Grinding/Drilling |
| Production Volume | Over 100 Pieces Per Month |
| Heat Treatment | Solution Treatment |
| Hardness | HB55-85 |
| Testing Method | CMM |
Product Uses
1. Crankshaft Main Support for Marine Engines
The AlSn20Cu main bearing is designed to support marine crankshafts under high RPM and continuous load. Its precise fit and stable oil film reduce friction and vibration, improving fuel efficiency and overall engine performance.
2. Long-Term Continuous Operation for Ocean-Going Vessels
Ideal for cargo ships, fishing vessels, and transport ships during extended voyages. The bearing maintains dimensional stability under high load and impact conditions, extending engine life and minimizing maintenance frequency.
3. High Salt and Humid Marine Conditions
The AlSn20Cu alloy provides excellent corrosion resistance, enabling long-term operation in saltwater and high-humidity environments. It prevents oxidation and wear, ensuring a reliable and stable marine power system.
4. Engineering and Tugboat Power Systems
Suitable for engineering ships, harbor tugs, and offshore construction vessels. The bearing performs reliably under frequent start-stop cycles and heavy-load operations, enhancing engine responsiveness and power transmission efficiency.
Product Operate Guide
Before installing the AlSn20Cu main bearing, ensure the crankshaft and bearing housing are clean and free of debris. Use proper alignment and pressing tools to insert the bearing evenly without excessive force. Apply the recommended marine engine lubricant to reduce initial friction. After installation, run the engine at low RPM first to check oil flow and bearing alignment. Regular inspections during operation help maintain smooth rotation, prevent premature wear, and ensure long-term reliable performance.
Product Video
FAQ
1.Q: Do you offer customized pipe fittings?
A: Yes, we support OEM/ODM customization. Please provide detailed drawings, and we can manufacture according to specific material, size, weight, surface treatment, and other requirements.
2.Q: What quality certifications does the product have?
A: Our products have multiple quality certifications, including ISO 9001 quality management system certification to ensure strict process control and consistent product quality. Additionally, CE certification and other relevant certificates can be provided upon customer request to meet various market and industry compliance standards.
3.Q: What is your minimum order quantity?
A: The minimum order quantity for customized products is typically 10 pieces. The exact quantity can be adjusted flexibly based on product model, specifications, material, and processing requirements.
4. Q: What should be considered during installation?
A: Ensure the crankshaft and bearing housing are clean before installation. Use proper pressing or alignment tools to insert evenly without excessive force. Apply recommended lubricant to reduce initial friction and ensure smooth operation.
