When specifying wear-resistant polymer components for high-load, continuous-duty equipment, thermal conductivity is often the limiting factor that determines replacement intervals. A 40% bronze filled PTFE rod for bearing solves this by dispersing bronze particles throughout the PTFE matrix, which increases heat dissipation and reduces hot-spot formation at the sliding interface. This composite structure retains the low-friction properties of pure PTFE while improving compressive strength, dimensional stability, and thermal transfer. It is widely used in dry-running bushings, thrust washers, and rotary seals where external lubrication is not possible. For larger cross-sections and heavy radial loads, our heavy duty bronze filled PTFE rod range offers a denser bronze network and improved creep resistance. As a qualified 40% bronze PTFE round bar supplier, we maintain inventory in common diameters and can machine custom profiles with tight h9 or h8 tolerances. In hydraulic cylinders, valve blocks, and fluid power units, the bronze filled PTFE rod for hydraulic version draws frictional heat away from seals and guide rings, preventing premature extrusion and reducing maintenance downtime.
| Property | Typical Value | Test Standard |
|---|---|---|
| Thermal conductivity | 0.45–0.65 W/m·K | ASTM E1530 |
| Density | 3.0–3.4 g/cm³ | ASTM D792 |
| Tensile strength | ≥ 18 MPa | ASTM D638 |
| Compressive strength | ≥ 45 MPa | ASTM D695 |
| Hardness | Shore D 62–68 | ASTM D2240 |
| Coefficient of friction | 0.08–0.14 | ASTM D3702 |
| Service temperature | -100°C to +200°C | Internal test |
| Linear thermal expansion | 8–12 × 10⁻⁵ /°C | ASTM E831 |
| Water absorption (24 h) | < 0.02% | ASTM D570 |
Bronze PTFE Rod is designed for components that must handle both high mechanical load and rapid heat removal. The bronze particles form a conductive network that transfers frictional heat from the wear surface to the surrounding structure, which helps the rod maintain its shape and reduces localized expansion that can cause binding in close-tolerance assemblies. Because the coefficient of thermal expansion is lower than pure PTFE, this material is easier to fit into metal housings without excessive clearance changes over a wide temperature range. The rod can be machined with standard carbide or diamond tooling, and it responds well to grooving, drilling, and threading for custom bearing configurations. In high-speed rotating applications, the improved thermal conductivity reduces the risk of heat-induced creep and extends the useful life of bushings, wear rings, and guide strips. The material is also resistant to most chemicals, solvents, and hydraulic fluids, making it suitable for aggressive environments where both heat and chemical attack are present. Typical uses include pump wear rings, marine rudder bearings, food processing equipment, and offshore valve seats.
