The bronze filled PTFE bushing for rotating shaft is engineered to provide reliable dry running performance in plain bearing applications. This design combines the low friction of PTFE with the structural reinforcement of bronze particles, making it an effective self lubricating bronze PTFE bearing bushing for shafts that cannot be frequently re-greased. When radial loads exceed standard limits or when the bearing must resist deformation under start-stop cycles, the PTFE bronze bushing heavy duty grade offers a thicker wall and a higher bronze content. As a specialized bronze filled PTFE bushing manufacturer, we test each batch for filler distribution, hardness and dimensional accuracy before shipping. The finished bushing acts as a wear resistant PTFE bushing with bronze that protects both the shaft and the housing, reducing maintenance frequency in rotating equipment such as pumps, mixers, conveyor rollers and agricultural machinery. Because the bronze filler increases thermal conductivity, the bushing dissipates frictional heat more effectively than virgin PTFE, which helps maintain a stable lubrication film at higher shaft speeds.
The Bronze Filled PTFE Bushing for Rotating Shaft is available in multiple configurations to match common shaft sizes and mounting conditions. Standard products include cylindrical sleeves, flanged bushings and thrust washers, and all versions can be machined with lubrication grooves, chamfers or locating notches. The material is produced by sintering a homogeneous blend of PTFE and bronze powder, then the bushing is finish-machined to the required inside diameter, outside diameter and length. This manufacturing route ensures consistent wall thickness and roundness, which are critical for low-vibration operation on rotating shafts.
Key features
Technical specifications
| Parameter | Typical value | Notes |
|---|---|---|
| Material matrix | PTFE with dispersed bronze particles | Bronze filler 40–60% |
| Density | 3.5–4.5 g/cm³ | Grade dependent |
| Tensile strength | 25–35 MPa | ASTM D638 |
| Compressive strength | 80–120 MPa | At 1% deformation |
| Max static load | 140 N/mm² | Short-term |
| Max dynamic load | 50–80 N/mm² | Depends on speed |
| Coefficient of friction | 0.04–0.10 dry | Steel shaft Ra 0.2–0.8 µm |
| Max sliding speed | 2.5 m/s dry | Reduce at high load |
| Max PV value | 1.8 MPa·m/s dry | Continuous operation |
| Temperature range | -200°C to +260°C | Short peaks to +280°C |
| Shaft diameter range | 5–300 mm | Custom sizes available |
| Wall thickness | 0.5–10 mm | Standard options |
| Length range | 5–200 mm | Flanged and thrust options |
| Chamfer or lead angle | 15°–30° | Optional |
| Inner surface finish | Ra 0.4–0.8 µm | After machining |
Typical rotating shaft applications
For rotating shaft assemblies in pumps, mixers, packaging machines and conveyor systems, the bushing can be supplied with standard or custom tolerances and machined features. Batch-level inspection covers inside diameter, outside diameter, wall thickness, surface roughness and material hardness to ensure repeatable press-fit retention and running clearances.
