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SF-1 plain steel bushing is a type of DU bearing, commonly known as a Teflon bearing, DU bush, PTFE-lined dry sliding bearing, or oil-free bush. The SF-1 self-lubricating bearing follows a standard design similar to other DU bearings, but with unique features that make it ideal for various industrial applications.
**Material Structure:**
1. **PTFE/Pb mixture (0.01–0.03 mm):** This layer acts as the sliding surface, creating an excellent initial transfer film that coats the mating surfaces and forms a homogeneous solid lubricant film.
2. **Porous bronze (0.2–0.3 mm):** Provides maximum thermal conductivity and serves as a reservoir for the PTFE-lead mixture, enhancing performance under high loads.
3. **Low-carbon steel backing (0.7–2.3 mm):** Offers strong structural support and exceptional load capacity, along with effective heat dissipation.
4. **Tin or copper plating (0.005–0.008 mm):** Enhances corrosion resistance, ensuring long-term durability in harsh environments.
**Key Features:**
- Excellent wear and friction performance across a wide range of loads, speeds, and temperatures—without the need for external lubrication.
- Can also perform well when lubricated, offering versatility in different operating conditions.
- **Maintenance-free** and designed for **long service life**, reducing downtime and maintenance costs.
**Available Designs:**
- Standard cylindrical bushings
- Flanged bushings
- Thrust washers and strips
- Lead-free options available
- Custom designs can be manufactured based on specific requirements
**Applications:**
The SF-1 bearing is widely used in lifting equipment, hydraulics, valves, pneumatic systems, medical devices, textile machinery, agricultural equipment, construction tools, material handling systems, packaging machines, automotive components, scientific instruments, drying ovens, office equipment, and more.
**Technical Specifications:**
- **Static Specific Load Capacity:** ≤ 250 N/mm²
- **Dynamic Specific Load Capacity (low speed):** ≤ 140 N/mm²
- **Rotating Oscillating Load Capacity:** ≤ 60 N/mm²
- **Friction Coefficient:** 0.03 – 0.25 µ
- **Operating Temperature Range:** -200°C to +280°C
- **Max Dry Running Pv (Short-term):** 3.6 N/mm²·m/s
- **Max Dry Running Pv (Continuous):** 1.8 N/mm²·m/s
- **Max Speed (Dry Running):** 2 m/s
- **Max Speed (Hydrodynamic Operation):** > 2 m/s
**Additional Information:**
- **Quality Standard:** DIN 1494
- **Packaging:** Standard export packaging
- **Lead Time:** 30 days
- **Shipping Options:** Courier, air, or sea
- **Supply Capacity:** 500 million pieces per month
- **Port of Shipment:** Shanghai
- **Certification:** ISO 9001:2008
- **HS Code:** 8483300090
**Why Choose Us?**
1. **Experienced OEM manufacturer** with over 10 years in the self-lubricating bearing industry.
2. **95% of products exported** to international markets, ensuring global reliability.
3. **Custom solutions** tailored to your needs, from design to delivery.
Whether you're looking for a reliable, low-maintenance bearing solution or a custom-engineered component, SF-1 is the perfect choice for high-performance applications. Contact us today to learn more about our products and services.