We professionally produces high-quality Large Scale Marine Tin Bronze Bushings for Ships. Our products use premium tin bronze as the core material and employ centrifugal casting technology. Addressing the pain points of critical components such as stern shaft bearings, propeller bushings, and marine pumps and valves in seawater environments—including susceptibility to corrosion and wear, difficulty in dimensional adaptation, and tight deadlines—we provide a complete solution from material selection to delivery and installation, resulting in more stable ship operation and more controllable maintenance costs.
Product Description
Our Large Scale Marine Tin Bronze Bushings for Ships range in diameter from 100mm to 2000mm and weigh from 5kg to 20t. Specifically designed for marine pumps, valve bodies, sealing rings, stern shaft bearings, and other applications, they directly address the challenges of equipment lifespan and stability posed by the marine environment. As a physical manufacturer, we leverage 30 years of technological accumulation, 50 heavy-duty centrifuges, and 25 industrial frequency induction furnaces to ensure production capacity and delivery efficiency. Furthermore, our strength and reputation are demonstrated by our cooperation with the Middle East military industry and our achievement of delivering 10-ton propeller shafts 5 months ahead of schedule.

We select high-quality alloys such as the Chinese national standard tin bronze ZQSN555 and the American standard C55500. Lead-containing tin bronze (such as QSn4-4-4) has self-lubricating properties that can reduce the coefficient of friction by more than 30%, allowing for stable operation without external lubrication and significantly reducing maintenance costs. Phosphorus-containing tin bronze (such as QSn6.5-0.1) has a tensile strength of 350-1035MPa and excellent elastic modulus, meeting the mechanical structure requirements of heavy-duty and low-speed sliding scenarios.

In the casting process, 50 heavy-duty centrifuges support the production of single 20-ton workpieces, with dimensional accuracy controlled within ±1mm. Combined with 5 testing devices including spectral analysis and flaw detection, we ensure that every Large Scale Marine Tin Bronze Bushings for Ships is free of defects such as porosity and cracks. During the machining phase, 30 high-precision machines (such as large vertical lathes and CNC lathes) achieve simplified machining with a single-sided error of 0.5mm, with a single-sided machining allowance of less than 1.5mm. Product utilization exceeds 95%, saving material costs and shortening delivery cycles. A Middle Eastern shipyard once ordered 15-ton propeller bushings, which were delivered in just 45 days from order placement, 5 months ahead of European suppliers. The entire process was supervised and inspected, and the product has been in use for 3 years without any problems, demonstrating our technical strength and on-time delivery guarantee.

The complexity of the marine environment requires Large Scale Marine Tin Bronze Bushings for Ships to possess "versatile" capabilities. For static or low-flow seawater applications, our copper bushings, through optimized alloy composition and casting processes, enhance corrosion resistance by 40%, far exceeding that of ordinary copper alloys. They can withstand long-term seawater erosion and salt spray corrosion, extending the service life of pumps and valves by more than double. In moving components such as stern shaft bearings and propeller bushings, the wear resistance and friction reduction properties of copper bushings play a crucial role. Their balanced design of hardness and toughness allows them to withstand heavy loads while preventing sparks from impacts, meeting the explosion-proof requirements of mines and flammable/explosive environments. For precision components such as steering gears and seawater pipelines, the electrical and thermal conductivity of copper bushings (though lower than pure copper, it is superior to most alloys) ensures stable electrical connections, improves heat dissipation efficiency by 25%, and reduces the risk of equipment overheating.

Service Commitment

Trust Throughout the Entire Lifecycle from Factory Inspection to After-Sales Service

Purchasing Large Scale Marine Tin Bronze Bushings for Ships is not just a transaction, but the beginning of a long-term partnership. We understand that a buyer's trust in a supplier stems from a comprehensive assessment of their capabilities, quality control, and service responsiveness. From the operation of 26 industrial frequency induction furnaces to the debugging of 50 centrifuges, from the testing process in our spectroscopy laboratory to the processing details in our high-precision workshop, During production, supervise and participate in every step from raw material inspection to finished product packaging, ensuring that the products fully meet requirements.

After delivery, we provide detailed installation manuals and video guidance, and promise "shipment after passing inspection; returns and exchanges are accepted for any quality issues encountered during use," completely eliminating any concerns. Our products are exported to more than 30 countries in the Middle East, Southeast Asia, and Europe, covering various major national projects.