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[China]
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Marginal Lubricating Metal Polymer Plain Bearings PTFE are a specialized type of bearing designed to provide optimal performance in lubrication-constrained environments. These bearings feature a polymer material, primarily polytetrafluoroethylene (PTFE), which is renowned for its excellent lubricating properties and low friction coefficient.
The combination of metal and PTFE polymer in these bearings creates a robust yet lubricating surface that can withstand high loads and temperatures while maintaining smooth operation. The marginal lubricating design ensures that even in conditions where lubrication is limited, the bearings can still function effectively, reducing wear and extending bearing life.
PTFE's inherent chemical resistance and non-stick properties also contribute to the bearings' durability and performance, making them suitable for a wide range of applications in industries such as machinery, automotive, and chemical processing. Marginal Lubricating Metal Polymer Plain Bearings PTFE are an excellent choice for those seeking high-performance bearings that can handle challenging lubrication conditions.
A PTFE Metal-polymer marginal-lubricating bearings is comprised of a metal shell and a very thin polymer coating (PTFE) applied to the inside.
Choose from our selection of PTFE Metal-polymer marginal-lubricating bearings in a wide range of styles and sizes. In stock and ready to ship.
Consisting of a metal backing for high mechanical strength and a sintered bronze layer, Metal-Polymer bearings are impregnated with an anti-friction overlay enriched with PTFE or high performing thermoplastic combined with fillers to obtain an optimal running surface.
1. Strength and Stiffness and Low Friction
When a steel backing is combined with PTFE or POM, the strength and stiffness properties are enhanced by the low friction of the polymer material. The use of a polymer layer such as PTFE also deals with issues such as corrosion and unwanted chemical interactions by providing protection the metallic layer(s).
2. Many composite bearings are, by their very nature, dry-running.
They can be designed so that no grease or lubricant is required, which can be very important for applicants that are sensitive to contamination or other instances where grease could pose a problem. When designed correctly composite bearings can provide extreme low friction, almost eliminate issues with stick-slip, and reduced break-away torque requirements.
3. Dimenstional Stability
Another issue that composite bearings can address quite well is dimensional stability.Some polymers are especially susceptible to dimensional changes through absorption of water or reactions to temperature variations. The use of composites can significantly reduce those problems.
1. PEEK/PTFE thickness 0.20~0.35 mm, provides good wear resistance. This bearing surface carries a pattern of circular indents which should be filled with grease on assembly of the bearing.
2. Sintered bronze thickness 0.20-0.35mm, provides strong mechanical bond and excellent thermal conductivity.
3. Low-carbon steel, provides mechanical strength and thermal conductivity.
Max. load | Static | 250N/mm² |
| Friction coefficient | 0.08~0.15 | |
Very low speed | 140N/mm² | Max.speed | Dry running | 2m/s | ||
Rotating oscillating | 60N/mm² | Hydrodynamic operation | >2m/s | |||
Max. PV Dry running | Short-term operation | 3.6N/mm²*m/s | Thermal conductivity | 50W(m*K)-1 | ||
Continuous operation | 1.8N/mm²*m/s | Coefficient of thermal expansion | 11*10-6*K-1 | |||
Operation Temperature range | -150℃～+250℃ |
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When it comes time to select a bushing or bearing for a particularly sensitive application, it might be wise to add composites to your list of potential bearing materials. Composite bearings may be primarily metal with a low-friction polymer lining, or they may be filament wound fiber reinforced materials with a polymer matrix. Regardless of which type of composite bearing is under consideration, remember that they can offer added benefits such as improved strength, stiffness, wear properties, and reduced friction while possibly eliminating the need for lubricants.
The material has wide operation temperature range and can be used under high PV value condition. It is used in hydraulic motors, pumps, diesel engine common rail system and heavy truck brake systems.
