The self-lubricating oilless flanged graphite bronze sleeve bushing is a specialized mechanical component designed to provide smooth and reliable operation without the need for external lubrication. This type of bushing is crafted from graphite bronze, a material that combines the benefits of both graphite and bronze, resulting in exceptional wear resistance, corrosion resistance, and self-lubricating properties.

The flanged design of the bushing allows for easy installation and secure attachment to machinery components. The graphite bronze material is inherently self-lubricating, meaning it can maintain a low coefficient of friction and reduce wear even in the absence of external lubricants. This eliminates the need for regular lubrication maintenance, reducing downtime and improving overall system efficiency.

The self-lubricating oilless flanged graphite bronze sleeve bushing is ideal for applications where lubrication is difficult or undesirable, such as in high-temperature or high-pressure environments. It is also suitable for applications involving frequent start-stops, high-speed rotation, or heavy loads, as it can maintain a consistent level of performance even under extreme operating conditions.

In summary, the self-lubricating oilless flanged graphite bronze sleeve bushing is a reliable and efficient solution for reducing friction and wear in mechanical systems. Its unique combination of material properties and design features enables it to operate smoothly without the need for external lubrication, improving system performance and reducing maintenance requirements.

These oilless bushings are self-lubricating bearings composed of high strength brass alloy bases manufactured with advanced casting technology and built-in solid lubricants. They can be combined with different types of solid lubricants depending on the conditions of use.

Standard copper alloy oil-free bushing MPBZ graphite copper bushing self-lubricating copper bushing corrosion-resistant copper bushing

Self-Lubricating Oilless Graphite Plugged Bronze Bushing, Factory Price, Contact Us!

Various standard oilless bushings products are available.

Specify Part No. by required I.D. and Length. (e.g.) I.D. is 50mm and length is 30mm.

Flange Integrated Oil Free Bushings

Flange Integrated Oil Free Bushings / Oil Free Copper Alloy Washers

Oil impregnated flanged sintered bronze bushes

Bronze w/Graphite

These components are made of solid aluminum bronze and are available with or without self-lubricating graphite.

• Maintenance without the need for lubrication. Demonstrates high performance in high load, low speed operations.
• Demonstrates superior wear resistance in applications where the oil film is infrequently produced, such as reciprocating, oscillating, frequent starts and stops, etc.
• Superior chemical resistance and corrosion resistance.
• Standard products are available in different sizes.

Plain & Self-Lubricating Bearings(Bushing Material:Graphite Impregnated Brass)

• Maintenance-free (self-lubricating)

• For heavy load applications
• Tolerance to extreme temperatures
• Long service life

Cast Bronze With Solid Lubricant Plugs - Metric

Material:

Standard material: CuZn25A16Fe3Mn3 + Graphite

Graphite Plugged Bronze Bushing Characteristcs

• Unparalleled high load, low speed performance. Perform well even without lubrication,
• Excellent wear resistance in those places where it is difficult to form a film of oil due to back and forth movements, oscillating movements and often intermittent processes
• Remarkable resistance to corrosion and chemical attack
• Maintenance-free and saves operating costs.

Avaliability

Oilless Bushing forms available in standard dimensions

• Straight Oilless Bushings
• Flanged Oilless Bushings
• Thrust Washer Bushings

Metric self-lubricating bearings and imperial oilless bushings made to order: standard bushing forms in special dimensions, half-bushings, special shapes obtained by stamping or deep drawing, customized bushing designs

Graphite Plugged Bronze Bushing Application

The oilless bushing is widely used in successive casting machine, mineral mountain machinery, shipping, steam turbine etc.

Flange graphite bronze oilless bushing

Solid graphite plugged bronze oilless bushings

The base of the solid lubricating bearing should be determined according to the working conditions of the bearing itself. The more commonly used materials are high-strength brass, tin bronze, castings, etc. There are two main types of embedded solid lubricating materials, one is natural black lead, Artificial graphite is synthesized with MoS2, and the other is synthesized with . According to the bearing's own working conditions, through the combination of different metal substrates and embedded solid lubricants, it can ensure that the product can meet various temperatures, loads, motions and media. Special needs under the conditions, while ensuring stable and reliable work.

JDB solid graphite plugged bronze bushings

JDB solid graphite plugged bronze bushings are widely used in metallurgical continuous casters, train supports, rolling equipment, mining machinery, ships, steam turbines, and other high temperature, high load, low speed and heavy load occasions; in low load, high temperature, medium speed and other occasions, such as fireplaces Door, oven raceway, rubber machinery, light industry machinery, machine tool industry; its end face can be welded and installed with the base body, so it is suitable for metallurgical machinery, construction machinery, oil transportation machinery and other fields that cannot be refueled; in lifting machinery The supporting parts are especially adapted, such as hoist support, crane support, and excavator support.

Application characteristics of oilless bushing:

It is especially suitable for rotating motion under heavy load and low speed, rocking motion and parts that are not easy to form fluid lubrication under load; it can be used for a long time under boundary lubrication conditions without refueling maintenance, and refueling in the process can make the bearing use The service life can be more extended; the plastic layer on the surface can leave a certain margin during the forming and processing of the shaft sleeve, and can be processed by itself after being pressed into the opening to achieve a better assembly size.

At present, it is mainly used in metallurgical machinery, mining machinery, water conservancy machinery, automobile chassis, construction machinery, agricultural machinery, steel rolling machinery, etc.

1. The mixture of modified polyoxymethylene (POM) and lead is 0.3~0.5mm, which has high wear resistance, and has a low friction coefficient even in the case of instantaneous oil shortage. There are regularly arranged oil storage pits with spiral angles on the bearing surface, which must be covered with lubricating grease during assembly.

2. The copper powder layer is 0.2~0.3mm, which has good carrying capacity and wear resistance, and good thermal conductivity can transfer the heat generated during the operation of the bearing in time. The composite material can penetrate into the gap of the copper powder ball to improve the bonding strength.

3. Low carbon steel 0.4~2.2mm, improve the bearing capacity and heat transfer effect.

4. Copper/tin plating layer, copper plating layer 0.008mm, tin plating layer 0.005mm, so that the bearing has good corrosion resistance.

Flange Bronze Oilless Bushings Size Model

Oilless 500SP Flange Bronze Bushings Size Chart

Beyond Grease: A Deep Dive into Oilless Bushings & Why Viiplus Leads the Way

Friction is the enemy of efficiency. In countless machines, from massive industrial equipment to intricate automotive components, the constant battle against wear and tear dictates performance, longevity, and maintenance costs. Traditionally, grease and oil have been the go-to solutions, but they come with their own set of challenges: frequent re-lubrication, potential contamination, environmental concerns, and limitations in extreme conditions.

Enter the world of oilless bushings, also known as self-lubricating bearings or sliding bearings. These innovative components offer a smarter way to manage friction, delivering reliable movement without the need for external lubrication.

At Viiplus (www.viiplus.com), we don't just supply these components; we engineer solutions. Leveraging deep expertise in metallurgy and tribology (the science of friction, wear, and lubrication), we've become a leading name in sliding bearing technology. But what exactly are oilless bushings, and why should they be on your radar? Let's dive deeper.

What Exactly Are Oilless Bushings? The Science of Self-Lubrication

Unlike traditional ball or roller bearings that rely on rolling elements and require constant lubrication films, oilless bushings operate on the principle of sliding motion. Their "magic" lies in their material composition and structure, designed to provide their own lubrication at the bearing surface. This can be achieved through several key technologies:

1. Solid Lubricants Embedded: Materials like graphite, MoS₂, or PTFE are embedded directly into the metallic matrix (often bronze) of the bushing. As the shaft rotates or slides, a minuscule amount of this solid lubricant is transferred to the mating surface, creating a low-friction film.

2. Porous Metal Structures: Sintered bronze or iron materials are created with microscopic pores. These pores are vacuum-impregnated with oil during manufacturing. In operation, slight heating causes the oil to expand and seep onto the bearing surface, providing lubrication. When it cools, the capillary action draws the oil back in, creating a closed-loop system.

3. Layered Composites: These often feature a strong backing (like steel), an intermediate sintered layer (like bronze), and a low-friction overlay (often PTFE-based). The PTFE layer provides the primary sliding surface, offering extremely low friction.

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Contrasting Logic: Oilless vs. Traditionally Lubricated Bearings

The Tangible Benefits: Why Make the Switch?

Choosing oilless bushings isn't just about eliminating grease guns. It's about unlocking significant operational advantages:

• Drastically Reduced Maintenance: This is the most obvious benefit. No re-greasing means less labor, less scheduled downtime, and simplified maintenance protocols. Imagine the savings across a factory floor!

• Enhanced Reliability: Lubricant starvation is a major cause of bearing failure. Self-lubricating bearings ensure consistent lubrication, leading to predictable performance and longer service life, especially in hard-to-reach locations.

• Superior Performance in Harsh Conditions: Oilless bushings excel where traditional lubricants fail:

  • High Temperatures: Certain types can operate at temperatures far exceeding the limits of conventional greases.

  • Low Temperatures: No grease means no stiffening or freezing issues.

  • Contaminated Environments: The absence of sticky grease reduces the ingress of dirt, dust, and debris.

  • Vacuum or Underwater: Ideal for applications where liquid lubricants are impractical or impossible.

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• Cost Savings (Total Cost of Ownership): While the initial purchase price might sometimes be higher, the TCO is often significantly lower due to savings on lubricants, labor, downtime, and potential component failure replacement.

• Environmental Friendliness: Eliminating oil and grease leakage prevents contamination of products, machinery, and the environment. Crucial for industries like food processing, pharmaceuticals, and textiles.

• Compact & Simplified Designs: Without the need for lubrication systems (nipples, lines, reservoirs), machine designs can be more compact and streamlined.

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Exploring Viiplus's Portfolio: Finding Your Solution

Viiplus offers a comprehensive range of self-lubricating bearings designed to meet diverse application needs. Understanding the different series helps in selection:

• JDB Series (Graphite Plugged Bronze): Excellent for high-load, low-speed applications, intermittent motion, and high temperatures. The graphite plugs provide continuous solid lubrication. Ideal for heavy machinery, molds, and hydraulic components.

• SF Series (PTFE-Based Composite): Typically metal-backed (SF-1: steel, SF-2: steel/bronze) with a PTFE-based lining. Offers very low friction, good wear resistance, and suitability for dry running or marginal lubrication. Common in automotive, office equipment, and hydraulics.

• JF Series (Bimetal Bushings): Combines a steel backing with a sintered bronze or lead-bronze lining. Good load capacity and fatigue strength. Often used with grease or oil but can operate marginally lubricated. Found in engines, chassis parts, and agricultural machinery.

• FB Series (Wrapped Bronze): Often made from bronze strip, sometimes with lubrication pockets or through-holes. A cost-effective solution for medium loads and speeds, typically requiring initial greasing but offering extended re-lubrication intervals.

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Quick Comparison Chart (General Guide):

(Note: This is a simplified guide. Always consult specific product data sheets or Viiplus experts for precise application requirements.)

Uncertain which material or type suits your project? Our Bushing Material Selection Guide is designed to help, or Contact Us for a Free Quote and Expert Advice.

Why Partner with Viiplus? Expertise Meets Quality

Choosing the right supplier is as critical as choosing the right bushing. Here’s why companies worldwide trust Viiplus:

• Deep Expertise: Our foundation in metallurgy and tribology, coupled with a talented R&D team, means we understand the science behind reliable movement. We don't just sell; we solve friction challenges.

• Uncompromising Quality: We employ advanced manufacturing techniques (including sand casting, centrifugal casting, metal casting, investment casting) and a rigorous quality management system, ensuring every bushing meets the highest standards.

• Comprehensive Range: From standard metric sizes in JDB, SF, JF, and FB series to custom solutions including cylindrical, flange, double flange bushings, wear plates, and guide rails – we have the portfolio to match your needs.

• Global Reach, Seamless Logistics: Based in China, we ship sliding bearings worldwide. Our professional team handles customs clearance efficiently, ensuring smooth, timely delivery with all necessary documentation.

• Customer-Centric Approach: We believe in ethical practices and building trust. We offer flexible production (single units to large series), competitive pricing, and  online support.

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