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SF-1 / DU Composite Sleeve Bearing Oilless Bushings Plain Bearings Self-Lubricating 18mm - 200mm BoreDue to system display limitations, this product listing only includes sizes with an inner diameter (ID) of 18–200 mm. For inner diameters from 3–50 mm, please see our other listing or contact us.Upgrade your machinery with our high-performance SF-1 Self-Lubricating Bearings. Also known as DU Bushings, these oilless plain bearings are engineered to provide smooth, maintenance-free operation without the need for external lubrication. Featuring a robust three-layer composite structure, they are the perfect solution for applications where grease or oil is impractical or prohibited.Key Features:
✅ High-Performance Composite Structure: Three-layer design with steel backing, sintered bronze middle layer and PTFE surface, ensuring excellent load capacity and wear resistance.
✅ Maintenance-Free Operation – The self-lubricating PTFE lining eliminates the need for grease or oil, preventing contamination and reducing downtime.
✅ High Wear Resistance – Advanced embedded solid lubricant technology improves wear performance by 50%, offering a low friction coefficient of just 0.03–0.20 for smooth, quiet operation and reduced risk of seizure.
✅ Robust Load Capacity – With a static load rating of 250 N/mm² and a dynamic load rating of 60 N/mm², these bushings handle heavy loads reliably. The maximum PV value reaches 3.6 N/mm²·m/s.
✅ Wide Operating Range – Suitable for dry speeds up to 2 m/s and oil-lubricated speeds over 2 m/s, with a working temperature range from -200°C to +280°C.
✅ Thin-Wall Precision Design – Lightweight yet rigid construction ensures a tight fit, high dimensional accuracy, and excellent corrosion resistance.
✅ Versatile Application: Ideal for environments where cleanliness is crucial or where lubrication is difficult to access. Ideal for use in automotive, hydraulic, textile, packaging, and automation machinery, replacing traditional greased bearings.
Available in various sizes to meet different strength and weight requirements.
Please select size and quantity pack from drop down option above.
Other sizes and quantities available upon request.
Product Specifications：
- Material: SF-1 / DU Composite (Steel Backing + Sintered Bronze + PTFE)
- Lubrication: Self-Lubricating (Oil-Free / Maintenance-Free)
- Friction Coefficient: 0.03 ~ 0.20
- Maximum Permissible Speed (V):
- Dry Operation: ≤ 2 m/s
- Lubricated Operation: > 2 m/s
- Ultimate Dynamic Load Capacity: 60 N/mm²
- Ultimate Static Load Capacity: 250 N/mm² (at 1 m/min)
- Operating Temperature Range: -200°C ~ +280°C
- Maximum Permissible PV Value: 3.6 N/mm²·m/s
- Applications: Widely used in machinery, hydraulics, automotive, textile, packaging and automation equipment as replacement parts. Wherever reliable, maintenance-free linear or rotary motion is required.
- Bore Diameter (ID): 18mm - 200mm
- Outer diameter (OD): 20 mm – 205mm
- Length: 6mm - 120mm
- Option Size= Bore (ID) x Outer Diameter (OD) x Length
● Exact dimensions can also be viewed in the photo gallery.
● Note: Standard Manufacturers Tolerances Apply
● Due to the manufacturing process and inevitable objective reasons, slight scratches may appear on the surface.
● You can find more products in different material, type, color, sizes, quantity and shapes in our shop！ If you have special needs, please contact us, we can customize according to your needs!● Note:- Please allow a difference of ±1-2mm due to manual measurement. Thank you for your comprehension.
- Light shooting and different displays may cause the color of the items in the pictures to be slightly different from the real ones.Package included : ( According to your choice )
