The brass graphite copper sleeve is a compact, self-lubricating bearing component designed specifically for small size applications. Its unique combination of brass, graphite, and copper materials offers several advantages that make it an ideal choice for a wide range of demanding applications.

Brass, a common alloy composed primarily of copper and zinc, provides the sleeve with excellent strength and durability. It is resistant to corrosion and oxidation, ensuring that the sleeve maintains its structural integrity and performance over time.

Graphite, a naturally occurring mineral, is known for its exceptional lubricating properties. Embedded within the brass matrix, the graphite particles provide a continuous lubricating film between the sleeve and the mating surface. This film significantly reduces friction and wear, allowing the sleeve to operate smoothly and efficiently.

The addition of copper further enhances the sleeve's performance. Copper is a soft, ductile metal that improves the overall machinability and wear resistance of the brass alloy. It also contributes to the sleeve's excellent thermal conductivity, enabling it to dissipate heat effectively during operation.

The compact size of the brass graphite copper sleeve makes it suitable for applications where space is limited. Its self-lubricating properties eliminate the need for external lubricants, reducing maintenance requirements and improving reliability.

In summary, the brass graphite copper sleeve is a versatile and reliable bearing component for small size applications. Its unique material combination offers superior strength, durability, and lubricating properties that ensure smooth operation and extended service life.

High power brass graphite copper sleeve self-lubricating linear bearing copper sleeve

High tensile brass alloy solid lubricant embedded

High strength brass brass

A variety of alloys consisting of more than two elements are called special brasses. Such as aluminum, lead, tin, manganese, nickel, iron, silicon composition of copper alloy, high force brass is one of them. High strength brass has strong wear resistance, high strength brass, hardness, strong chemical corrosion resistance. There are also machining mechanical properties that are very superior. High strength brass is often used to manufacture sheet, bar, bar, pipe, casting parts, etc. Chemical composition

The chemical formula of high strength brass is ZCuZn25Ai6Fe3Mn3, which contains about 65% copper and 25% zinc. Aluminum improves the strength, hardness, and corrosion resistance of brass. There are three kinds of brass at room temperature: brass with zinc content below 35%, and the microstructure at room temperature is composed of single-phase A solid solution, known as A brass.

■ Application field

brass application is very extensive, the casting made of bearing and bushing, domestic now mainly made of high strength brass for matrix solid lubrication oil-free bearings (hereinafter referred to as solid embellish bearing), is to use brass Gao Ligao strength as a matrix, and embedded radial arranged orderly cylindrical polymer filler for friction materials (as for graphite, 2 - molybdenum, ethylene, oil, and other lubricants), its superiority lies in its made of copper alloy and non-metallic antifriction material has the respective complementary advantages, not only has the high bearing capacity, and breakthrough - the line on the oil film bearing grease lubrication, achieve no oil lubrication, The embedded solid lubrication is easy to form lubrication film, which plays a great role in improving the friction and wear performance, and is stable, reliable and cost-effective. Compared with the composite oil-free bearing, it has the advantages of good machinability, high precision, strong bearing capacity, and good wear resistance. The self-lubricating guide bush guide can be used in many fields such as engineering machinery joints, such as excavator, mining scraper, the rotating drill, concrete pump truck, rock drill machine, hoist, port cranes, etc., and metallurgical machinery casting machinery, water conservancy machinery, transportation machinery, rolling mill, bottle blowing machine blown film machine, injection molding machine cross-clamping differential, tires mechanism, trailer balance beam, vacuum switch, etc.

Solid Bronze Bushings, Plugged graphite brass bushes.

Application fields:

1. Special bearings for construction machinery

2. Special bearings for injection molding machinery

3. Special bearings for molds

4. Automobile: air conditioning compressor, fuel pump, gearbox, shock absorber, starting motor, etc

5. Hydraulic components: gear pump, piston pump, vane pump, compressor, oil cylinder, etc

6. Logistics and port machinery: outdoor logistics machinery such as moving truck, stacker, lifting platform truck, and port machinery

7. Stamping, forging, and pressing machinery

8. Agricultural machinery: combine harvester, seeder, bale baler, grinder, tractor and another cylinder, suspension system, joint parts and other parts that can not be refueled or difficult to form oil film

9. Office equipment: facsimile machine, copier, shredder, scanner, printer and other joint and reciprocating moving parts

10. Food machinery

11. Energy facilities: environmentally friendly new energy such as wind power generation, solar power generation, water conservancy power generation and other convenient use

12. Fitness and entertainment equipment

Bronze Bearings Alloy Material

Bronze Bearings Material composition and properties

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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