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Premium DU-B Flanged Washers (SF-1B): High-Performance Steel-Backed Self-Lubricating Solutions
Elevate your machinery’s efficiency with our DU-B (SF-1B) Flanged Washers. Engineered for versatile motion, these washers combine the structural strength of low-carbon steel with a high-performance PTFE-bronze sliding surface. While standard bronze washers require constant lubrication to prevent failure, our SF-1B series features a multi-layer composite that creates its own protective transfer film, ensuring maintenance-free operation and exceptional durability in the most demanding environments.
Why Choose DU-B (SF-1B) Flanged Washers?
The primary advantage of our DU-B series lies in its Self-Lubricating Matrix and Thermal Efficiency. By employing a precision sintering process, these flanged washers provide:
- Dry Running Excellence: Specifically designed for dry operation with a remarkably low coefficient of friction and minimal wear rates.
- Superior Load & Heat Management: The steel backing provides exceptionally high load-carrying capacity, while the sintered bronze layer ensures maximum thermal conductivity away from the sliding surface.
- Corrosion & Swelling Resistance: Features a high resistance to chemical interference and significantly lower water absorption compared to traditional materials, preventing mechanical swelling.
Advanced Four-Layer Structural Engineering
The SF-1B series utilizes a sophisticated material stack to deliver consistent performance under pressure:
- PTFE/Fibre Overlay (0.01 ~ 0.03mm): Provides an excellent initial transfer film that coats mating surfaces with an oxide-type solid lubricant.
- Sintered Bronze Powder (0.20 ~ 0.35mm): Acts as a critical reservoir for the PTFE mixture while maximizing heat dissipation.
- Low-Carbon Steel Backing: The structural foundation that grants the washer its high load capacity and mechanical strength.
- Copper/Tin Plating (0.002mm): A precision exterior coating that provides essential corrosion resistance for long-term reliability.
Technical Data: Physical and Mechanical Properties
|
Property |
Value |
Unit |
|
Thermal Conductivity ( |
40 |
W/mK |
|
Maximum Operating Temperature (T |
280 |
°C |
|
Minimum Operating Temperature (T |
-200 |
°C |
|
Compressive Yield Strength ( |
350 |
N/mm^2 |
|
Maximum Static Load (P |
250 |
N/mm^2 |
|
Maximum Dynamic Load (P |
140 |
N/mm^2 |
|
Maximum Sliding Speed (V |
2.5 |
m/s |
|
Maximum PV Factor (Dry, continuous operation) |
1.8 |
N/mm^2 |
|
Maximum PV Factor (Dry, intermittent operation) |
3.5 |
N/mm^2 |
|
Coefficient of Friction (f |
0.02 - 0.25 |
- |
|
Coefficient of Friction (f |
0.02 - 0.12 |
- |
Usage Guidelines
|
Lubrication Type |
Performance Rating |
|
Dry |
Good |
|
Oil Lubricated |
Good |
|
Grease Lubricated |
Fair |
|
Water Lubricated |
Fair |
|
Process Fluid Lubricated |
Fair |
Typical Applications
Our DU-B flanged washers are the go-to solution for "trouble-free" performance across global industries:
- Automotive & Heavy Equipment: Power steering cylinders, disc brake calipers, shock absorbers, and agricultural machinery like tractors and combines.
- Hydraulics & Valve Systems: Gear pumps, axial piston pumps, butterfly valves, and valve trunnions.
- Business & Printing Automation: Photocopy machines, mail sorters, computer printers, and postage meter systems.
- Home Appliances & Material Handling: Air conditioners, refrigerators, sewing machines, marine engines, and textile equipment.
Technical Specifications & Customization
|
Treatment / Type |
Best For |
Functional Benefit |
|
Low-Carbon Steel |
High-Load Capacity |
Provides exceptional structural rigidity and superior heat dissipation. |
|
Sintered Bronze Layer |
Thermal Conductivity |
Serves as a reservoir for the PTFE mixture while keeping the surface cool. |
|
PTFE/Fibre Mixture |
Maintenance-Free |
Ensures low friction and protects mating metal surfaces via a transfer film. |
|
Copper/Tin Plating |
Corrosion Resistance |
Protects the steel backing from oxidation in various operating environments. |
|
Flanged Geometry |
Complex Motion |
Ideal for rotary, oscillating, and reciprocating movements requiring axial support. |
Expert Guidance & Technical Support
If you have questions regarding the specific performance of DU-B (SF-1B) Flanged Washers in your application, or require technical data sheets, we are here to help. Our team provides specialized support for both standard and custom sizing needs. Please submit your inquiry via our website contact form or email us directly at [email protected] for a detailed consultation.
