DUB Thrust Washer (SF-1B): High-Performance Bronze-Backed PTFE Composite for Extreme Environments

Elevate the reliability of your machinery with our DUB Thrust Washers (SF-1B). Specifically engineered for maintenance-free operation, this series utilizes a premium Bronze Backing instead of standard steel, offering a significant performance shift in corrosion resistance, thermal management, and anti-magnetic properties. Whether operating under dry-running conditions or in chemically aggressive environments, the SF-1B provides a stable, low-friction solution where conventional bearings fail.

Why Choose DUB Bronze-Backed Thrust Washers?

The primary purpose of the SF-1B (Bronze Backing + PTFE Lined) design is to provide a high safety factor for long-life performance in environments where oil lubrication is inefficient or impossible. Key benefits include:

• Extreme Corrosion Resistance: The solid bronze backing offers superior protection against oxidation and chemical attack compared to SBU (steel-backed) bearings, making it ideal for marine, outdoor, or humid industrial settings.
• Anti-Magnetic & Spark-Free: The non-ferrous bronze construction ensures the washers are anti-magnetic, which is critical for specialized electronic equipment and hazardous environments.
• Maintenance-Free Dry Operation: Engineered for dry running, the PTFE/Fibre lining creates a self-lubricating transfer film that protects mating metal surfaces and ensures a low coefficient of friction without the need for grease.
• High Thermal Stability: Designed for successive long-period working conditions, the bronze-on-bronze structure excels in high-temperature environments, facilitating rapid heat dissipation.

Advanced Multi-Layer Structure & Performance Shift

The SF-1B distinguishes itself from standard composite bearings by transitioning to a full-bronze support system, optimizing thermal and chemical performance:

1. PTFE/Fibre Lining (0.01–0.03mm): The primary sliding interface provides an excellent initial transfer film. This forms an oxide-type solid lubricant layer that coats mating surfaces, ensuring smooth rotary and oscillating movement with minimal wear.
2. Sintered Bronze Interlayer (0.200.35mm): This porous layer serves as a critical reservoir for the PTFE/Fibre mixture while providing maximum thermal conductivity to draw heat away from the bearing surface.
3. Solid Bronze Backing: Unlike steel backings that can rust, the bronze backing provides exceptionally high load-carrying capacity combined with inherent corrosion resistance and excellent heat dissipation.

Typical Applications

Our DUB thrust washers and SF-1B bushings meet the demanding criteria of heavy industry and high-precision equipment:

• Steel Metallurgy Industry: Ideal for roller grooves in successive casting machines and high-temperature processing lines.
• Fluid & Chemical Handling: Cement grouting pumps, screw conveyors, and valves exposed to abrasive or corrosive media.
• Heavy Machinery: Agricultural equipment, construction machinery, and mechanical lifting systems.
• Specialized Environments: Applications requiring anti-magnetic properties or operation in high-temperature zones where oil lubrication is not viable.

Expert Guidance & Technical Support

If you are transitioning from steel-backed bearings to bronze-backed solutions for improved longevity, or if you need customized dimensions for casting machinery, our technical team is ready to assist. Please submit your inquiry via our website contact form or email us directly at [email protected] for a comprehensive technical consultation.