Metal-Polymer Plain Bearings: Self-Lubricating and Maintenance-Free Solutions, Improve technology without lubrication

Metal-Polymer Plain Bearings are engineered composite bushings designed for low friction, high wear resistance, and heavy load capacity, particularly under boundary or intermittent lubrication conditions. These bearings combine steel backing, a porous bronze sinter layer, and a POM (Polyoxymethylene) sliding layer with lubrication indents, making them an ideal choice for demanding industrial and automotive applications.

Composition of Metal-Polymer Composite Bearing Materials， Browse our Services for Custom Bearings

• Steel Backing – Provides structural strength and stability, ensuring excellent load-carrying capacity.

• Porous Bronze Sinter Layer – Acts as a bonding and support structure, ensuring optimal adhesion between steel and polymer while enhancing heat conductivity.

• POM Sliding Layer with Lubrication Indents – Ensures low friction, wear resistance, and the ability to retain lubrication for extended service life.

This multi-layer composite design makes Metal-Polymer Bearings a reliable, maintenance-free solution in environments where constant lubrication is not possible.

Standard Bearing Forms Available

• Cylindrical bushes / split bushings

• Thrust washers

• Sliding plates

These standard dimensions cover most industrial requirements, but custom solutions are also possible depending on specific applications.

Applications of Metal-Polymer Plain Bearings

1. Automotive Industry

• Suspension Systems: Control arms, shock absorbers, and steering systems benefit from high load capacity and reduced maintenance.

• Door Hinges & Seat Mechanisms: Provide smooth, durable operation for hinges, seat adjusters, and folding parts.

• Engine Components: Used in throttle valves, EGR valves, and transmission systems to minimize friction and wear.

2. Industrial Machinery

• Heavy Equipment: Excavators, loaders, and cranes use them in pivots and joints, performing under shock loads and contaminated environments.

• Conveyors & Material Handling: Enable smooth movement in pulleys, rollers, and guide systems with minimal lubrication.

• Pumps & Compressors: Suitable for high-temperature, high-wear rotary and reciprocating motion parts.

3. Agricultural Equipment

• Tractors & Harvesters: In steering, suspension, and hydraulic connections where dust and contaminants are present.

• Seeding & Tillage Machines: POM indents retain lubrication, making them ideal for intermittent lubrication applications.

4. Construction Equipment

• Excavators & Bulldozers: Deployed in hinges, arms, and track systems under heavy shock loads.

• Concrete Pumps: Withstand vibration and high-load joint applications.

5. Energy & Power Equipment

• Wind Turbines:

  • Yaw Systems: Support nacelle rotation under high load, low-speed, and high-temperature conditions.

  • Pitch Systems: Manage dynamic loads and micro-movements while resisting corrosion in offshore environments.

• Hydraulic Systems:

  • Valves: Reduce friction and sticking in spools, stems, and throttling components.

  • Actuators: Guide piston rods under high-frequency reciprocating motion.

Why Choose Metal-Polymer Plain Bearings?

• Self-Lubricating Performance: POM sliding layer with lubrication indents ensures long-lasting operation without continuous lubrication.

• High Load & Wear Resistance: Withstand heavy-duty and boundary lubrication conditions.

• Adaptability to Harsh Environments: Suitable for applications exposed to dirt, dust, vibration, salt spray, and chemical fluids.

• Design Flexibility: Available in cylindrical, thrust, and sliding plate forms for diverse engineering requirements.

Case Study: Wind Turbines & Hydraulic Systems

Wind Turbine Yaw Bearings

• Withstand nacelle rotation under heavy static and dynamic loads.

• POM self-lubricating surface reduces maintenance intervals in offshore wind farms.

Pitch Bearings in Blade Adjustment

• Handle frequent oscillations and micro-movements.

• Resist saltwater corrosion, extending system service life.

Hydraulic Valves & Actuators

• Provide low-friction movement in high-pressure environments.

• Enhance reliability of piston rod guidance and sealing performance.

Conclusion

Metal-Polymer Plain Bearings are the go-to solution for industries seeking maintenance-free, self-lubricating, and high-performance bearing technology. From automotive suspensions to wind turbines and hydraulic systems, these bearings deliver long service life, reduced maintenance costs, and reliable performance in boundary lubrication and harsh operating environments.

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