Features of composite bushings

POM Bushings: The Self-Lubricating Effect

  • Self-Lubricating Effect for metal pom bearings, Metal-Polymer Hydrodynamic Composite Bearings

  • Features of pom bushings, The Self-Lubricating Effect, metal bushing materials consist of steel backed, fibers and filling materials, and solid lubricants.

  • However, all pom composite bushings have certain general properties in common.

  • POM composite bushing made from materials that:

    1. Can handle high loads over an extended period of time
    2. Have low coefficients of friction
    3. Have low wear rates resulting in a longer service life

    • Metal-Polymer Composite Material
    • Steel Back + Porous Bronze Sinter +
    • PEEK + PTFE + Fillers

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One component of the POM bushing material acts for each function: The base pom bushing are crucial for wear resistance Fibers and filling materials reinforce the bushing so that it can withstand high forces or edge loads Solid lubricants automatically lubricate the bushings and reduce friction in the system.

Boundary lubricated bearing is made of high quality low carbon steel plate, sintered spherical bronze powder in the middle, surface rolling modified Polyoxymethylene (POM) and oil storage pit It is suitable for the place with low speed and heavy load under normal temperature, replacing the traditional copper sleeve, which not only reduces the cost but also prolongs the service life. When it is used on the rolling mill, the frequency of oil filing can be saved and the replacement procedure can be simplified.

Every pom composite bushing material possesses a set of special features making it suitable for different applications and requirements. The POM bushing has been widely used in automobile chassis, forging machines, metallurgy and mining machinery, engineering machinery, steel rolling industry, and other fields.

 Marginal Self- lubricating Bearing

  • POM 0.30-0.50mm modified polyoxymethylene
  • Copper powder layer 0.2~0.35mm
  • Low carbon steel, improve bearing capacity
  • Copper/tin plating 0.002mm

A composite bushing is a type of composite sleeve bearing that uses both materials of metal and plastic to provide the best possible performance. It’s an ideal solution for applications where you need high-performance, but don’t want to compromise on cost or weight. Composite bushings are used in automotive, marine, and industrial equipment. They can be found in everything from power steering pumps to aircraft landing gear systems.

The benefits of using composite bushings are that they are lighter than solid metal bushings, they last longer because they are self-lubricating bushing, and they can absorb shock better than most other options.

PerformanceRelated data
Maximum load pressureDead load250N/mm2
Dynamic load140N/mm2
Maximum PV valueDry3.8N/mm2. m/s
Grease lubrication60N/mm2. m/s
Maximum linear speedDry2m/s
Grease lubrication10m/s
Thermal ConductivityDry0.08~0.20
Grease lubrication0.02~0.05
Thermal Conductivity40W/m .k
Linear expansion coefficient12×10-6/k

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POM Thrust Washer, Self-lubricated Bearing Parts.

A POM (Polyoxymethylene) thrust washer is a type of self-lubricating component used to reduce friction and wear in thrust applications. POM is a high-performance engineering plastic known for its low friction and excellent wear resistance properties. When used as a thrust washer, it provides reliable and maintenance-free operation.

The self-lubricating properties of POM eliminate the need for external lubrication, making it a suitable choice for applications where regular lubrication may be impractical or challenging. The POM material itself acts as a solid lubricant, reducing friction and minimizing wear between the thrust surfaces.

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Bearing bushes supplier

self-lubricating bearing bushing and thrust washer

As one of the china supplier and manufacturers of bronze oilless bearings, sliding bearings technology components & self-lubricating bearings, we can be found on almost every continent – with production facilities, sales offices, and technology centers –because our customers appreciate short decision-making channels, prompt deliveries, and local service. A complete portfolio of grinding, cutting, blending, finishing and polishing solutions for a wide array of markets and applications. Our team of experts is dedicated to assisting you throughout the process, from understanding your requirements to delivering high-quality bushes that meet or exceed your expectations. We take pride in our ability to provide custom-designed bushes that are tailored to your specific needs and deliver excellent performance in your machinery or equipment. Contact us to discuss your metric or imperial bushing requirements, and we will work with you to provide the ideal solution, whether it's a standard form in special dimensions or a fully customized design. Your satisfaction is our priority, and we are committed to delivering bushing solutions that meet your unique specifications.


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Bushes - Metric Size

We offer a wide range of metric and imperial size bushes that can be tailored to your specific requirements. Our product lineup includes standard bush forms available in special dimensions, as well as half-bushings and custom shapes obtained through stamping or deep drawing processes. We specialize in providing customized bushing designs to meet your unique needs. Whether you require metric size or imperial size bushes, we can accommodate your preferences and provide a solution that suits your application perfectly. Our manufacturing capabilities allow us to produce bushes in a variety of materials, including bronze, brass, steel, and more, ensuring compatibility with your specific operating conditions.

By offering made-to-order bushes, we can provide you with the exact specifications and dimensions you need. This level of customization ensures a precise fit and optimal performance in your application, minimizing friction, reducing wear, and maximizing the lifespan of the bushes.

competitively priced vs DU bushing


Wrapped composite bushing

Wrapped bushing, pom layer

Wrapped bronze bushing,Lubrication layer

Wrapped bronze bushing,with ptfe

Solid bronze bushing, plugged graphite


Flange sliding bearing, plugged graphite

Square bearing, plugged graphite

Graphite copper sleeve

Wrapped bushing, Bronze CuSn8

Bimetal Bushing

Steel Backed Washer

oil-free thrust washer


Wear plate, bronze with lubricant plugs embedded

bronze bearings bushing

Oil-Free Plate, With Holes

Solid bushing, bronze with lubricant plugs embedded

Self-Lubricating Plain Bearings

Bronze plate with lubricant plugs embedded

Bearing Technology


long-lasting bearings

  • Looking to build your own customizable bushing, Contact us to explore our range of self-lubricating bearing bushings and take advantage of our self-lubricating sleeve parts configurator. We are here to provide you with customized, high-quality solutions for your specific requirements.

  • Metal bushing material possesses a set of special features making it suitable for different applications and requirements.

  • Easy installation, Lower souring costs, Increased shaft tolerances possible

  • By choosing our self-lubricating bearing bushings and utilizing our configurator, you can benefit from reduced maintenance needs, improved efficiency, and enhanced reliability. Our team is dedicated to assisting you throughout the process, ensuring that you receive the best possible solution for your application.

The Self-Lubricating Effect

Self-lubricated bearing bushing technology

We offer customized self-lubricating bearing bushings with a self-lubricating effect to meet your specific requirements. Our goal is to provide tailored solutions that address your unique needs and deliver optimal performance. Traditionally, lubrication is required to reduce friction and wear between moving parts. However, with our self-lubricating bearing bushings, you can eliminate the need for external lubricants. These bushings are designed to provide their own lubrication, ensuring smooth operation and extended service life.

To assist you in finding the right self-lubricating sleeve parts, we also offer a self-lubricating sleeve parts configurator. This tool allows you to customize the specifications of the bushings based on your application requirements, such as size, material, and operating conditions. By using our configurator, you can easily select the appropriate self-lubricating bushings that suit your needs.

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A self-lubricating bearing bushing is a cylindrical or flanged sleeve that is typically made of a composite material or metal alloy with embedded solid lubricants. These solid lubricants, such as graphite or PTFE (polytetrafluoroethylene), are dispersed throughout the material and act as a continuous source of lubrication during operation. As the bearing bushing experiences movement, the solid lubricants are released and form a thin film between the sliding surfaces, reducing friction and minimizing wear.

Thrust washers, on the other hand, are flat components used to support axial loads and facilitate smooth movement between two surfaces. Like self-lubricating bearing bushings, thrust washers can be made from composite materials or metal alloys with embedded solid lubricants. The self-lubricating properties of thrust washers ensure that they can handle high-pressure and high-velocity applications without the need for external lubrication.

The benefits of self-lubricating bearing bushings and thrust washers include:

Maintenance-free operation: These components eliminate the need for regular lubrication, reducing maintenance costs and downtime.

Reduced friction and wear: The self-lubricating properties ensure a continuous supply of lubrication, minimizing friction and extending the service life of the components.

Increased load-carrying capacity: The combination of the bearing bushing or thrust washer material and the embedded solid lubricants enhances the load-carrying capacity, making them suitable for high-load applications.

Corrosion resistance: Some self-lubricating bearing bushings and thrust washers are designed to resist corrosion, making them suitable for use in harsh environments or applications exposed to moisture.

These self-lubricating components are commonly used in various industries, including automotive, aerospace, industrial machinery, and marine applications. They provide reliable and efficient performance, contributing to the overall functionality and longevity of mechanical systems.

A PTFE bushing is a self-lubricating bearing made of a metal composite material. It consists of a low carbon steel substrate, a spherical sintered porous copper powder layer in the middle, and a PTFE wear-resistant lubricating material on the surface as the working layer of the bearing.

The high-quality low carbon steel substrate provides strength and support to the bushing. The middle layer of spherical sintered porous copper powder serves multiple purposes. It helps dissipate heat generated during operation, improves the bonding strength between the plastic layer and the substrate, and provides additional mechanical load capacity.

The surface layer of the bushing is coated with PTFE, a material known for its excellent properties in dry friction situations. PTFE is specifically designed to operate without the need for external lubrication. It offers a wide range of materials that can be tailored to meet specific requirements for lubrication, friction coefficient, and durability. This allows PTFE metal composite materials to perform optimally under various loads, speeds, and temperature conditions, even in scenarios where external lubrication is not present or minimal.

PTFE bushings excel in providing reliable performance, even in demanding applications where lubrication may be limited. They offer excellent wear resistance, reduce friction, and can withstand high loads and speeds. This makes them suitable for a wide range of industrial applications, including automotive, machinery, and other mechanical systems.

Overall, PTFE bushings offer the advantage of self-lubrication, ensuring long-lasting performance, reduced maintenance requirements, and improved efficiency in mechanical systems.

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When it comes to self-lubricated bushing materials, there are various options available based on specific working conditions and requirements. Some commonly used materials include:

Bronze backed: These bushings have a bronze backing that provides excellent mechanical strength and support. The bronze layer is often combined with a self-lubricating material, such as PTFE or graphite, to enhance the lubrication properties.

Stainless steel-backed: Stainless steel-backed bushings offer enhanced corrosion resistance and durability. They are suitable for applications where exposure to moisture or harsh environments is a concern.

Lead-free formulations: Lead-free bushings are designed to meet environmental regulations and requirements. They are typically made from composite materials or alloys that do not contain lead. These bushings offer similar performance characteristics to their lead-containing counterparts.

Other formulations: Depending on the specific application and performance needs, there are various other formulations available for self-lubricated bushings. These formulations can include different combinations of materials, such as polymers, metals, and solid lubricants, to achieve desired properties like improved wear resistance, reduced friction, or specific temperature capabilities.

The selection of the bushing material depends on factors such as load capacity, operating temperature, speed, environmental conditions, and desired service life. It is important to consult with manufacturers or experts to determine the most suitable material for a given application.

Customizing self-lubricated bushing materials allows for flexibility in meeting specific requirements and optimizing performance in various working conditions.

The operating performance of a self-lubricating bushing is influenced by several factors, including the surface polymer's chemical resistance and the corrosion resistance of the steel back and its appearance, such as electroplating.

The self-lubricating bushing's surface polymer typically exhibits good chemical resistance, which helps protect it from degradation due to exposure to various chemicals. However, the overall corrosion resistance of the bushing also depends on the steel back and the type of protective coating applied to its surface.

If the steel back of the bushing is copper or tin plated, it can effectively prevent atmospheric corrosion. These coatings act as a barrier, shielding the steel from direct contact with the surrounding environment. This helps to maintain the structural integrity and corrosion resistance of the bushing.

In situations where the bushing operates in corrosive media, additional protective measures may be required. One option is to galvanize the steel back, which involves applying a layer of zinc to the surface. Galvanization provides enhanced corrosion protection, even in more aggressive environments.

By considering the specific working conditions and the potential for corrosion, appropriate measures can be taken to ensure the self-lubricating bushing's optimal operating performance. This may involve selecting a suitable steel back and applying protective coatings or treatments as necessary. Consulting with experts or manufacturers can provide guidance on the best approach to achieve the desired corrosion re

Composite Bushing Industry

Self-lubricating composite bearing bushings find applications in various industries. Some common applications include:

  1. Agricultural machinery: They are used in tractors, combine harvesters, crop sprayers, bulldozers, graders, and other agricultural equipment to provide reliable and low-friction performance in moving parts.

  2. Automotive industry: Self-lubricating composite bushings are utilized in power steering pumps, steering thrust pads, disc brakes, shock absorbers, door hinges, wipers, chair angle adjustments, air valves, and solenoid valves. They help reduce friction, noise, and wear in these automotive components.

  3. Office and business machinery: These bushings are employed in copiers, fax machines, printers, mail processors, and other office equipment to ensure smooth and efficient operation.

  4. Hydraulic components and valves: Self-lubricating bushings are used in gear pumps, piston pumps, vane pumps, ball valves, butterfly valves, cylinders, and other hydraulic components. They provide long-lasting performance and reduce the need for frequent lubrication in hydraulic systems.

  5. Household appliances: Self-lubricating composite bushings are found in refrigerators, air conditioners, vacuum cleaners, sewing machines, washing machines, microwave ovens, and fitness equipment. They contribute to the smooth and quiet functioning of these appliances.

  6. Other industries: Self-lubricating bushings are also employed in logistics machinery, packaging machinery, textile machinery, port machinery, mineral machinery, forest machinery, and various types of construction machinery and equipment. They offer reliable performance in moving parts, reducing friction, and enhancing efficiency.

Overall, self-lubricating composite bearing bushings are versatile components used in a wide range of industries to minimize friction, wear, and the need for external lubrication. Their application helps improve the performance, longevity, and reliability of various mechanical systems and equipment.

The wear resistance of self-lubricating bushings can be characterized by three stages:

  1. "Running-in" stage: During this stage, the surface layer of the bushing, which is composed of a mixture of PTFE (polytetrafluoroethylene) and other fillers, fills in surface imperfections and forms a transfer film on the opposing surface. At this point, the friction coefficient may be higher as the material undergoes initial wear. This stage is represented by Curve I in the figure.

  2. "Stable" wear stage: Once the running-in stage is complete, the friction between the PTFE surfaces becomes smoother, resulting in a low and stable friction coefficient. The wear rate of the material is also low and stable during this stage. This stage is represented by the area under Curve II in the figure.

  3. "Abrupt" wear stage: In this stage, the PTFE lubricant present in the pores of the porous layer becomes depleted, leading to insufficient lubrication between the friction surfaces. As a result, the friction coefficient rapidly increases, and the wear rate of the material accelerates dramatically. This stage continues until approximately 70% of the bronze substrate is exposed. At this point, the bushing's life is close to termination.

These wear stages demonstrate the dynamic nature of the self-lubricating bushing's performance over time. Proper lubrication and monitoring of the bushing's wear condition are essential to ensure optimal performance and longevity. Regular maintenance and replacement of worn-out bushings are recommended to prevent excessive wear and potential damage to the machinery or equipment.

The life of a self-lubricating bearing bushing is influenced by several factors:

  1. PV value: The PV value (pressure x velocity) is a crucial parameter for determining the wear life of the bushing. Higher PV values result in increased friction and heat, which can lead to accelerated wear. To extend the bushing's life, it is important to reduce the PV value by adjusting factors such as load, speed, and lubrication.

  2. Ambient temperature: The operating temperature has a significant impact on the bushing's service life. Higher ambient temperatures can cause accelerated wear and degradation of the self-lubricating properties of the bushing. It is essential to consider the temperature limitations and select a bushing material that can withstand the anticipated operating conditions.

  3. Surface compatibility: The choice of shaft material and surface roughness can affect the life of the self-lubricating bushing. Using alloy steel or hard chrome-plated shafts with an appropriate surface roughness (Ra = 0.4 ~ 0.63) can improve the performance and longevity of the bushing.

In addition to the standard catalog products, manufacturers often offer the option to provide non-standard or custom-designed bushings to meet specific customer requirements. This allows for tailored solutions based on application demands and desired performance criteria.

To maximize the life of a self-lubricating bearing bushing, it is important to consider these factors, select the appropriate bushing material, optimize operating conditions, and ensure proper lubrication and maintenance practices are followed. Regular inspections and replacement of worn-out bushings are recommended to maintain optimal performance and prevent potential equipment failure.

Self-lubrication technology refers to the design and implementation of materials or systems that can provide their own lubrication, reducing or eliminating the need for external lubricants. This technology aims to minimize friction, wear, and maintenance requirements in various applications.

There are different approaches to achieving self-lubrication:

  1. Solid Lubricants: Materials such as graphite, molybdenum disulfide (MoS2), or polytetrafluoroethylene (PTFE) can be embedded or dispersed within a matrix material. These solid lubricants act as a continuous source of lubrication, reducing friction and wear between surfaces.

  2. Composite Materials: Self-lubricating composites combine a matrix material with reinforcing fibers or particles that have inherent lubricating properties. The presence of these lubricating components provides a self-lubricating effect, enhancing performance and reducing friction.

  3. Porous Structures: Self-lubricating systems can incorporate porous structures that retain lubricants within their void spaces. These structures can release the lubricant during operation, forming a thin film that reduces friction and wear.

  4. Surface Treatments: Surface modifications can be applied to enhance self-lubrication. Examples include coatings, such as DLC (Diamond-Like Carbon) or Teflon-based coatings, that provide low friction and wear resistance.

Self-lubricated technology offers numerous benefits, including reduced maintenance requirements, increased efficiency, extended service life, and improved reliability in various industries. It finds applications in automotive components, industrial machinery, bearings, seals, gears, and many other mechanical systems.

The development and implementation of self-lubricated technology continue to advance, providing innovative solutions to optimize performance, reduce environmental impact, and enhance the overall functionality of various applications.

More than 50% of machine failures are caused by either too much or not enough lubrication.

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We are committed to providing high quality bronze oilless products and services to meet your specific needs. Our goal is to offer the best possible solutions to ensure your satisfaction at any time. We understand the importance of reliable and durable products in various industries and applications. That's why we prioritize quality in our manufacturing processes, using high-grade materials and advanced techniques to deliver bronze oilless products that meet stringent standards.

  • Focus on reducing or eliminating friction, wear and lubrication bronze oilless parts, Whether you require bushings, bearings, or other oilless products, we are dedicated to offering a wide range of options to cater to your requirements. Our products are designed to provide exceptional performance, reduce friction and wear, and operate efficiently without the need for external lubrication.

  • Manufacturers of maintenance-free sliding elements, Our team of experienced professionals is here to assist you in finding the ideal solutions for your specific needs. We can provide guidance, technical support, and product recommendations to ensure you receive the best possible outcome.

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