Bronze-filled (40%) PTFE balls combine the low-friction properties of PTFE with the mechanical strength and thermal conductivity of bronze. These composite balls exhibit a specific gravity of 3.0–3.12 g/cm³, tensile strength of 22–27 MPa, and hardness of 65–68. They offer enhanced wear resistance, compression strength, and thermal conductivity compared to pure PTFE, though with slightly reduced chemical resistance. Their dark brown color and balanced properties make them suitable for demanding applications like plain bearings, bushings, and pipeline linings where durability and low friction are critical.
Key Points Explained:
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Material Composition & Appearance
- Bronze-filled PTFE contains 40% bronze particles uniformly dispersed in a PTFE matrix.
- The composite has a distinctive dark brown color due to the bronze content.
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Physical Properties
- Specific Gravity: 3.0–3.12 g/cm³ (higher than pure PTFE due to bronze’s density).
- Hardness: 65–68 (measured on the Shore D scale), providing resistance to indentation and deformation.
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Mechanical Performance
- Tensile Strength: 22–27 MPa, significantly improved over unfilled PTFE (which typically has ~20 MPa).
- Compression Strength: Enhanced load-bearing capacity, making it suitable for high-stress applications like bearings.
- Abrasion/Wear Resistance: Bronze filler reduces wear rates, extending component lifespan in dynamic applications.
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Thermal & Frictional Characteristics
- Thermal Conductivity: Higher than pure PTFE, aiding heat dissipation in high-speed or high-load scenarios.
- Low Coefficient of Friction: Retains PTFE’s self-lubricating properties, reducing energy loss and wear in moving parts.
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Chemical & Environmental Limitations
- Reduced Chemical Resistance: Bronze filler makes the material less inert than pure PTFE, limiting use in corrosive environments (e.g., strong acids/alkalis).
- Temperature Stability: Maintains performance across a broad range (-200°C to +260°C), though bronze may affect long-term thermal aging.
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Typical Applications
- Plain bearings and bushings (combining low friction with load capacity).
- Seals and linings for pipelines/tanks (leveraging abrasion resistance).
- Industrial machinery components requiring thermal conductivity and durability.
For purchasers, consider trade-offs: while bronze filling improves mechanical properties, it may not suit chemically aggressive environments. Verify compatibility with operational conditions (load, speed, temperature) to ensure optimal performance.
Summary Table:
| Property | Value/Range | Advantage |
|---|---|---|
| Specific Gravity | 3.0–3.12 g/cm³ | Higher density for improved load-bearing capacity. |
| Tensile Strength | 22–27 MPa | Superior mechanical strength compared to pure PTFE. |
| Hardness (Shore D) | 65–68 | Enhanced resistance to indentation and deformation. |
| Thermal Conductivity | Higher than pure PTFE | Better heat dissipation in high-speed/high-load applications. |
| Coefficient of Friction | Low | Retains PTFE’s self-lubricating properties for reduced wear. |
| Temperature Range | -200°C to +260°C | Stable performance across extreme temperatures. |
| Chemical Resistance | Reduced vs. pure PTFE | Limited suitability for corrosive environments. |
Upgrade your industrial components with bronze-filled PTFE balls for unmatched durability and performance. At KINTEK, we specialize in precision-engineered PTFE solutions tailored for semiconductor, medical, laboratory, and industrial applications. Whether you need standard products or custom fabrication—from prototypes to high-volume orders—our expertise ensures optimal material performance. Contact us today to discuss your requirements and discover how our PTFE components can enhance your operations!