CuSn8 Bronze Wrapped Rolled Plain Bearing (Split Type) for Hydraulic Cylinders
CuSn8 Bronze Wrapped Rolled Plain Bearing (Split Type) for Hydraulic Cylinders
High-Performance Self-Lubricating Bronze Bushing Solutions & Technologies. Minimize downtime, extend service life, and reduce costs for dynamic applications.
CuSn8 Wrapped Bronze Plain Bearings for Hydraulic Cylinders
CuSn8 wrapped bronze plain bearings, also known as phosphor bronze CuSn8, are high-performance solutions for low-speed, high-load applications, particularly in hydraulic cylinders used across construction, material handling, agriculture, and industrial machinery. These bearings combine wear resistance, corrosion resistance, and semi-self-lubricating properties to enhance reliability and reduce maintenance.
CuSn8 Material Overview
CuSn8 is a phosphor bronze alloy composed of approximately:
| Element | Composition | Function |
|---|---|---|
| Copper (Cu) | ~92% | Provides base strength and conductivity |
| Tin (Sn) | ~8% | Enhances wear resistance and hardness |
| Phosphorus (P) | Trace | Acts as deoxidizer, improving purity and performance |
Manufacturing Process:
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Cold-formed from solid bronze strips into a rolled, wrapped, split-type bushing
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Surface features lubrication holes or diamond-shaped lubrication indents
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Indents retain grease or oil to form a lubricating film, reducing friction and wear
Key Material Properties
| Property | Specification | Advantages |
|---|---|---|
| Load Capacity | Supports static loads up to 150–250 MPa | Ideal for high-load hydraulic applications |
| Wear Resistance | Surface hardness 90–120 HB | Handles abrasive and contaminated environments |
| Low Friction | Coefficient 0.05–0.15 with lubrication | Smooth linear and oscillatory motion |
| Corrosion Resistance | Resists atmosphere, freshwater, seawater; stable up to 400°C | Suitable for harsh or humid environments |
| Self-Lubrication | Lubricating holes or diamond indents | Reduces maintenance and downtime |
CuSn8 bushings are compact, cost-effective, and durable, outperforming traditional bronze or steel bearings in demanding hydraulic systems.
Application Areas in Hydraulic Cylinders
CuSn8 wrapped bronze bushings with split-type design are widely used in hydraulic cylinders due to their ability to handle heavy loads, vibration, shock, and contamination. The split design allows for easy installation and replacement.
| Cylinder Component | Function | Operating Conditions | CuSn8 Benefits | Typical Equipment |
|---|---|---|---|---|
| Piston Rod Bearings | Guide piston rod linear motion | High radial loads, frequent start-stop cycles, exposure to hydraulic fluid | Lubrication holes ensure consistent oil supply; corrosion-resistant | Industrial presses, injection molding machines, construction machinery |
| Cylinder Head (Gland) Bushings | Guide piston rod, prevent metal contact | High-pressure seals, misalignment, contamination | Handles misalignment and abrasive particles; diamond indents retain grease | Tractors, hydraulic lifts, cranes |
| Pivot Points & Trunnion Mounts | Support rotational/oscillatory motion | Combined radial/axial loads, low-speed oscillation, external exposure | Split design simplifies installation; lubrication holes reduce friction; corrosion-resistant | Mobile cranes, hydraulic presses, material handling equipment |
| Rod End Bearings | Connect cylinder to linkages or actuators | Oscillating motion, high-impact loads, potential contamination | Shock absorption, low-friction performance, reduced maintenance | Forklifts, telescopic handlers, heavy-duty construction equipment |
Advantages in Hydraulic Cylinder Applications
| Feature | Benefit |
|---|---|
| Maintenance Reduction | Lubrication holes/diamond indents extend intervals; reduce downtime by up to 40% |
| Compact Design | Thin-walled, split-type construction saves space and weight |
| Durability | High wear and corrosion resistance for harsh environments |
| Cost-Effectiveness | More economical than fully machined bronze or steel bearings while maintaining performance |
Installation and Maintenance Recommendations
| Recommendation | Details |
|---|---|
| Lubrication | Fill lubrication holes or diamond indents with grease (e.g., lithium-based) during installation; periodic re-lubrication based on operating conditions |
| Sealing | Use seals in contaminated environments to retain lubricant and protect bearing surface |
| Standards Compliance | Conforms to DIN 1494 / ISO 3547 for compatibility with standard hydraulic cylinder designs |
| Customization | Available in cylindrical, flanged, or thrust washer forms; sizes tailored to cylinder requirements |
Typical Equipment Using CuSn8 Bearings
| Industry | Equipment Examples |
|---|---|
| Construction | Excavators, bulldozers, loaders |
| Material Handling | Forklifts, conveyors, warehouse cranes |
| Agriculture | Tractors, harvesters, sprayers |
| Industrial Machinery | Presses, injection molding machines, metal-forming equipment |
| Marine & Offshore | Hydraulic winches, deck machinery |
Conclusion
CuSn8 wrapped bronze bushings with lubrication holes or diamond indents are ideal for hydraulic cylinder applications. Their high load capacity, low friction, wear resistance, corrosion resistance, and split-type design make them suitable for piston rods, gland bushings, pivot points, and rod ends across heavy-duty hydraulic equipment. These bearings help reduce maintenance, increase equipment longevity, and enhance operational efficiency.
Metal Bushing (Lubricated Metal) -Self-Lubricating Bushing Materials
Bushings are specialized, self-lubricating metal components widely utilized across various industries due to their durability and low maintenance requirements. Self-lubricating metal bushings are engineered to function without additional lubrication in numerous applications, thereby minimizing maintenance needs. These bushings are available in various series and configurations, such as flanged bushings and split bearings, to meet specific application requirements.
Metal-Polymer Anti-Friction Plain Bearings
Metal-Polymer Composite Self-lubricating Bushing Material
Steel Back + Porous Bronze Sinter + PTFE
