DX/SF-2T Tin-plated Steel-Based Boundary Lubricating Bushing (Yellow PTFE)
This product provides high load capacity and wear resistance, ideal for high-load, low-speed rotation and oscillation where fluid lubrication is ineffective. It requires no maintenance under boundary lubrication, though occasional lubrication extends service life. The plastic layer allows post-assembly machining for precise fit. Applications include automotive chassis, metallurgical, mining, hydraulic, construction, agricultural machinery, and steel rolling systems. Its lead-free design meets environmental requirements.
Technical Parameters
| Parameter | Value/Condition |
|---|---|
| Static Load Capacity | 250 N/mm² |
| Max. Load Capacity – Very Low Speed – Rotating/Oscillating Motion | 140 N/mm² 70 N/mm² |
| Max. PV Value (Dry Running) | 3 N/mm²·m/s |
| Temperature Limit | –40 °C to +110 °C |
| Coefficient of Friction (Grease Lubrication) | 0.05–0.20 |
| Max. Sliding Speed – Grease Lubrication – Continuous Oil Supply | 2 m/s >2 m/s |
| Thermal Conductivity | 50 W/(m·K) |
| Coefficient of Thermal Expansion | 11 × 10⁻⁶ /K |
Metallographic Analysis
Mixture of POM and fibers: 0.3–0.5 mm
Spherical bronze powder: 0.2–0.3 mm
Steel backing: 0.4–2.2 mm
Electroplated layer:
Tin plating: 0.005 mm
Copper plating: 0.008 mm