Cyber Week

Self-lubricating Bearings VS Oil Bushings

  • Custom Self-lubricating bearing – Graphite Plugged Bronze Bushing;

  • Bespoke oil sintered bearings and structural powdered metal components

    A Self-lubricating Bearing

    Self-lubricating bearings are not bearings pre-coated with grease or oil – Graphite Plugged Bronze Bushing that has Solid lubricant in the bearing and flows out little by little due to frictional heat during use.

    This kind of Self-lubricating bearings for heavy-duty conditions. Operate the machine smoothly without the need for additional lubricants. It is widely used in automotive product lines, water engineering, dam gate, plastic industries, successive casting machines, steel rollers in the metallurgy industry, mineral machines, ships, turbo generators, hydraulic turbines, and injection molding machines.

    Self-lubricating Bearings VS oil Bushings
    Self-lubricating Bearings

    Types of Self-lubricating Bearings

    There are several types of self-lubricating bearings, each with its own unique characteristics and applications:

    1. Solid Self-lubricating Bearings: These are made from a solid material that incorporates lubricants within its structure.
    2. Bushed Self-lubricating Bearings: They consist of a bearing shell with an inner lining of a solid self-lubricating material.
    3. Composite Self-lubricating Bearings: These combine different materials, such as metals and plastics, to achieve self-lubrication.
    4. Porous Self-lubricating Bearings: Bearings with a porous structure that can be impregnated with lubricating oils or solids.
    5. Layered Self-lubricating Bearings: These have alternating layers of different materials, one of which provides the lubrication.
    6. Fluorocarbon Self-lubricating Bearings: Made from materials like PTFE (Teflon), which have inherently low friction properties.
    7. Metal-polymer Bearings: These combine metal components with polymers to achieve self-lubrication.

    Materials Used in Self-lubricating Bearings

    The effectiveness of self-lubricating bearings is largely due to the materials used in their construction:

    1. Polymer Materials: Polymers such as PTFE, UHMWPE (Ultra-High Molecular Weight Polyethylene), and POM (Polyoxymethylene) are commonly used for their low friction characteristics.
    2. Metals: Metals like copper, lead, and bronze are used for their ability to embed wear particles and provide a self-lubricating surface over time.
    3. Metal Matrix Composites (MMCs): These combine metals with a polymer or ceramic matrix to enhance wear resistance and lubrication.
    4. Graphite: Used for its lubricating properties, especially in combination with other materials.
    5. Molybdenum Disulfide (MoS2): A solid lubricant that is often used as a dry lubricant in self-lubricating bearings.
    6. Silicon Carbide (SiC): A ceramic material that can be used to reinforce polymers and enhance the bearing’s performance under high temperatures.
    7. Phenolic Resins: Used as a binder in some self-lubricating materials to improve their structural integrity.
    8. Fibers: Carbon, glass, or aramid fibers are sometimes added to polymers to increase strength and durability.
    Self-lubricating Bearings VS oil Bushings
    Self-lubricating Bearings VS Oil Bushings

    An Oil Bushings – Oil-Impregnated Bronze Bushings

    Oil bushing is a Sinter bronze component with high porosity (20-25% in volume), impregnated in a lubricant oil. The oil contained in the porosity provides a constant lubrication between the bearing and shaft, so the system does not need any additional external lubricant.

    We manufacture & export an assortment of bearings, bushes, dry bushings, flanged bearings, automotive washers, pump washers, wear plates, and CNC parts.

    Self-lubricating Bearings VS Oil Bushings

    Composition and Features of Oil Bushing


    • oil bushing is a sintered bronze material that has been impregnated with oil. The oil is held within the pores of the bronze matrix, providing a continuous source of lubrication.
    • The oil is typically a high-quality, long-lasting lubricant that is chosen based on the specific application requirements.


    1. Self-lubrication: The impregnated oil provides a constant supply of lubrication, reducing the need for external lubrication.
    2. Low Friction: The oil within the bronze matrix helps to minimize friction between moving parts.
    3. Wear Resistance: The combination of bronze and oil provides excellent resistance to wear, extending the life of the bearing.
    4. Corrosion Resistance: The bronze material offers good resistance to corrosion, making oil bushings suitable for harsh environments.
    5. Load Capacity: oil bushings can handle a wide range of loads, depending on their size and design.
    6. Low Maintenance: Due to their self-lubricating nature, sintered bushings require minimal maintenance, which is beneficial in applications where accessibility is limited.
    7. Compatibility: oil bushings can work well with various materials and are compatible with many types of machinery and equipment.

    Applications of Oil Bushings

    Oil bushings are used in a variety of applications due to their self-lubricating properties and durability. Some common applications include:

    1. Automotive Industry: They are used in various components such as engine parts, suspension systems, and transmission systems.
    2. Machinery and Equipment: Used in industrial machinery where low maintenance and high reliability are required, such as in pumps, conveyors, and agricultural equipment.
    3. Aerospace and Defense: sintered bushings are used in applications where weight and reliability are critical, such as in aircraft control systems and military vehicles.
    4. Marine Applications: Due to their corrosion resistance, they are ideal for use in marine environments, such as in boat engines and water pumps.
    5. Construction and Heavy Equipment: Used in construction machinery and heavy equipment where durability and low maintenance are essential.
    6. Medical Devices: In medical equipment where smooth operation and low friction are crucial, such as in surgical instruments and diagnostic equipment.
    7. General Engineering: For use in a wide range of general engineering applications where a reliable and low-friction bearing is required.

    sintered bushings provide a reliable and low-maintenance solution for applications that demand consistent performance and where regular lubrication is not feasible or practical. Their versatility makes them a popular choice across many different industries.

    Self-lubricating Bearings VS Oil Bushings

    The Difference Between “Self-Lubricating Bearings” And “Oil Bushings”

    Self-lubricating Bearings VS Oil Bushings

    Bearings are components used to support and also to support the rotating parts on the shaft, Oil bushings work by impregnating the lubricant into the sliding layer of the bearing. In contrast, self-lubricating bearings are made of graphite impregnated in small holes in the surface of the bushings. When in use, these bushings release the graphite, forming a lubricant film that keeps the machinery running smoothly.

    Production Process

    Self-lubricating Bearings VS Oil Bushings

    oil bushings are metal powder bonded to have 10-40% structural voids; Self-lubricating bearings matrix are centrifugally cast; the matrix density is relatively high, bond strength is relatively high compared to oil-impregnated bearings, and the operating life is longer than oil bearings;

    Slick Material

    100% Quality

    The slick material of oil bushings is lubricant oil, and the oil film has a satisfying thickness that eliminates direct contact between the two conflicting surfaces. the conflict coefficient is very small (f = 0.001 ~ 0.008), significantly reducing the conflict and wear;

    self-lubricating bearings smooth material is solid lubricant material, even in oil-free working conditions, can still go an excellent smooth effect, can ensure that the smooth does not stop and is sustainable, its useful smooth life with the life of the substrate;

    Lubrication Effect

    Oil-impregnated bearings within the lubricant oil with volatile and easy-to-lose sex, when in high temperature and high-pressure loss accelerated, can not get due smooth role;

    Self-lubricating graphite copper bushing, In the friction process, in the conflict surface to form a smooth excellent, strong attached, and uniformly covered solid carry film, substantially reducing the conflict wear. With the conflict, the solid lubricant embedded in the holes continuously supplies, to ensure a long time operation of the conflict vice excellent smooth.

    Maintenance-free Plain Bearings With Lubricating Plugs