Self Lubricating Bushings

Self-lubricating bushings are based on metal materials, holes are arranged in an orderly manner on the substrate, and oil-containing graphite or molybdenum dioxide is embedded as a solid lubricant.

They are a game changer in the world of machinery maintenance. we provide the ultimate guide to self lubricating bushings, including their benefits, how to choose the best ones for your needs, and how to maintain them for maximum lifespan. If you’re tired of constantly replacing worn-out bushings or spending a fortune on lubrication, this self-lubricating bronze bushing is for you. Email us now to discover everything you need to know about self-lubricating bushings.


Self-lubricating bushings are made of a metal body and inserted with solid lubricant in line, which is made of graphite or MoS2 with oil. While the bearing running with no oil. the solid lubricants will run out to the working surface by friction heat and reduce the friction coefficient.

Why lubrication is important

Lubrication is essential for the smooth operation and long service life of any bearing. It minimizes friction, reduces wear, and prevents overheating, which can lead to premature failure. Traditional bushings require periodic lubrication, either through manual greasing or the use of oil-impregnated materials. This can be time-consuming, costly, and not always environmentally friendly. Self-lubricating bushings offer a solution to these challenges.

Base Metal and Alloys

Selecting the proper base metal and alloy is crucial to the successful application of a self-lubricated bushing. There are many factors to consider that influence the the bearing suitability to the application. Some are Speed, Load, Environment, Mating Material, and Temperature.

Mode of operation:

Deposits (boreholes or groves) of solid lubricant are distributed with a proportion from 25% to 35% on the sliding surface of the base material.
The overlapping geometrical distribution of the deposits assures the lubrication of the entire surface.
During operation, a compact adhesive lubricating layer forms on the sliding surfaces, reducing direct solid-state contact to a minimum and protecting the sliding counterpart.
Our lubricants contain effective friction and wear-reducing elements, as well as corrosion-protecting supplements.
Metallic abrasion and impurities penetrating the sliding area are absorbed by the deposits, avoiding greater damage to the sliding surfaces.
The friction in VIIPLUS bearings is influenced by operating conditions, material, roughness, as well as the hardness of the sliding counterpart. The coefficient of friction ranges from 0,04 to 0,12, reaching the upper boundary towards the end of service life.
The temperature range of VIIPLUS standard elements extends from -50°C to 150°C. Special designs with wider temperature ranges (up to 200°C) are available on request.
The friction occurring in VIIPLUS-bearings is influenced by the material, roughness, and hardness of the sliding counterpart, as well as by the operating data. The coefficient of friction lies in the range of 0,06 ≤f ≤0,12 with an upper boundary tendency towards the end of service life.

oilless bearings and bushings, vehicle bushings, self lubricating bushings

Technical Data
Coefficient of friction(μ)<0.16
Max. Temp.300℃
Max. dynamic load100 N/mm²
Max. speed(Dry)0.4 m/s
Max. speed (Lubrication)5 m/s
PV limit3.8 N/mm² *m/s
Chemical Compositions
Chemical Compositions %
Basic materialMaterial hardness
CuZn25A16FeMn4210-250 HB
CuSn6Zn6Pb380-120 HB
Steel+CuSn6Zn6Pb360-90 HB
HT 250180-230 HB
GCr 15HRC 55-60

Types of Self Lubricating Bushings

  • Solid self-lubricating bushings
  • Graphite-embedded bronze bushings are made from a bronze base material with solid graphite particles embedded throughout. These particles provide a continuous source of lubrication as the graphite is exposed to the rubbing surface. The graphite acts as a dry lubricant, reducing friction and wear without the need for additional lubrication.
  • PTFE-coated bushings consist of a metal backing with a thin layer of polytetrafluoroethylene (PTFE) bonded to the surface. PTFE is a self-lubricating material with a low coefficient of friction and excellent resistance to wear and corrosion. These properties make it an ideal coating for bushings used in a variety of applications where traditional lubrication methods are not feasible or desirable.
  • Composite self-lubricating bushings are made from a combination of materials, typically consisting of a metal backing and a layer of self-lubricating material. The self-lubricating layer is typically made from a thermoplastic, thermosetting, or fiber-reinforced polymer matrix embedded with solid lubricant particles, such as graphite or PTFE. The metal backing provides structural support, while the self-lubricating layer ensures low friction and wear resistance.

Benefits of Self Lubricating Bushings

Self-lubricating bushings offer several advantages over traditional bushings that require regular lubrication. These benefits can lead to significant cost savings, improved performance, and a reduced environmental impact.

Reduced maintenance and downtime

One of the most significant benefits of self-lubricating bushings is the reduction in maintenance and downtime. Traditional bushings require periodic lubrication to function properly, which can be time-consuming and labor-intensive. Self-lubricating bushings eliminate the need for regular lubrication, reducing maintenance costs and minimizing equipment downtime.

Enhanced performance and durability

Self-lubricating bushings provide consistent lubrication throughout their service life, ensuring smooth operation and reduced wear. This results in enhanced performance and an extended service life compared to traditional bushings. The consistent lubrication also helps to prevent overheating, which can lead to premature failure in traditional bushings.

Environmental benefits

Traditional lubrication methods, such as greasing or using oil-impregnated materials, can have a negative environmental impact due to the potential for leaks or spills. Self-lubricating bushings eliminate the need for external lubricants, reducing the risk of environmental contamination. Additionally, the extended service life of self-lubricating bushings means less frequent replacement, leading to reduced waste and a smaller environmental footprint.

Versatility and adaptability

Self-lubricating bushings can be used in a wide range of applications and environments, including high-load, high-speed, or corrosive conditions where traditional lubricants may break down or become contaminated. Their adaptability makes them an ideal choice for various industries, such as automotive, aerospace, heavy machinery, and more.

Applications of Self Lubricating Bushings

Self-lubricating bushings are used across various industries due to their unique properties and advantages. Their ability to provide consistent lubrication in demanding conditions makes them an ideal choice for numerous applications.

Automotive industry

In the automotive industry, self-lubricating bushings are used in various components, such as suspension systems, steering systems, and transmission systems. They help to reduce friction, improve fuel efficiency, and extend the life of these components by reducing wear and tear.

Heavy machinery and construction equipment

Heavy machinery and construction equipment, such as excavators, bulldozers, and cranes, often operate in harsh environments and under heavy loads. Self-lubricating bushings are used in these applications to provide reliable performance, reduce maintenance requirements, and increase the service life of the equipment.

Aerospace and defense industry

The aerospace and defense industry demands high-performance materials that can withstand extreme conditions, such as high temperatures, high loads, and corrosive environments. Self-lubricating bushings are used in various aerospace components, including landing gear systems, flight control systems, and engine components, providing reliable performance and reduced maintenance.

Home appliances and recreational equipment

Self-lubricating bushings can be found in various home appliances and recreational equipment, such as washing machines, dryers, and fitness equipment. They provide smooth, low-friction operation, reduce noise, and minimize maintenance requirements for these devices.

Other industries

In addition to the above applications, self-lubricating bushings are used in many other industries, including agriculture, marine, food processing, and renewable energy. Their versatility, adaptability, and low-maintenance properties make them an attractive option for a wide range of applications.



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