These CuZn25Al6Fe3Mn4 bronze graphite bushings, also known as bronze sleeve bearings, feature a size of 20x30x30, which indicates an inner diameter (ID) of 20 millimeters, an outer diameter (OD) of 30 millimeters, and a length of 30 millimeters. The CuZn25Al6Fe3Mn4 alloy offers excellent strength, ductility, and corrosion resistance, making it a reliable choice for various applications.
The graphite impregnation within the bushings provides superior wear resistance and self-lubricating properties. This means that these bushings can operate smoothly with reduced friction and wear, even under high loads and speeds.
These bronze graphite bushings are commonly used in automotive, construction, and heavy machinery applications where reliability and durability are critical. They are suitable for both radial and thrust loading applications and can be easily installed into bearing housings.

Graphite plugged bearings are made of solid bronze with pre-integrated solid graphite lubricant. Their load limit is considerably higher than standard sliding bearings, where lubrication is dependent upon there being a film of oil.

These bronze bushing are made of C86300/C86200 CuZn25Al6Fe3Mn4 manganese bronze alloy used with heavy loads, in anti-corrosion applications or if it is very difficult to obtain lubricant. These bearings perform twice as well due to their strength and wear-resistance.

Customized bronze sleeve and flaged bushings are generally used in casting machines, in the mining and shipbuilding industries, in turbo generators and hydraulic turbines and for injection-moulding machines for the plastics processing industry.

Bronze Metric Graphite Plugged Sleeve Bearings Flanged Bushes

Graphite Plugged Sleeve Bushing is a material suitable for heavy loads at low sliding speed, solid lubricant is provided by Graphite with additive, which is inserted into the bronze structure of the bearings.
The base material are CuZn25. The available items in this material are the cylindrical and flanged bush, washers, strips, and special part on customer requests.
Self Lubricating Graphite Plugged Bronze Sleeve Bushing
Plug Graphite Sleeve Bushing
Engineered bronze sleeve bearings for Every Industry! Bronze Bushing Products
High tensile manganese bronze solid Our company produces various grades of copper alloy products:
Brass: H62, HAl66-6-3-2, an ordinary high-strength brass, special hard high-strength brass (HB> 250), etc. Aluminum Bronze: QAl10-5-5, ZCuAl10Fe3, ZCuAl9Fe4Ni4Mn2, CuAl10Ni etc. Bronze: ZCu5Pb5Zn5, CuSn7Zn4Pb7, CuSn8, CuSn12, ZCuSn10P1 etc. High lead and copper: ZCuPb10Sn10, CuPb15Sn7 etc. Meanwhile according to different customer requirements, in accordance with DIN, BS, EN, UNS, SAE and Chinese GB standards of production of various products (eg: CuZn39Pb3, CuZn40Al2, C86200, C95800, C48200). Welcome to inquire!

Self Lubricated for Higher Temperatures and Heavier Loads Solid self-lubricating bearing with graphite plug insert | Graphite copper sleeve bushings

• Inch Sized Bushings

• Metric Sized Bushings

Material

C86300/C86200 Manganese Bronze Bushings
C86300 Typical applications include slow speed heavy duty load bearings, gears, cams and hydraulic cylinder parts.continuous cast manganese bronze is a high strength, non-heat treatable copper alloy intended for use in applications requiring a good combination of outstanding wear characteristics and high bearing strength for heavy loads and slow speeds.

Bronze sleeve bearings flanged bronze bushings for sale

Performance

Graphite Plugged Cast Bronze Bushings can be utilized where heavy loads must be supported at low to medium speeds

The Plug Graphite Cast Bronze Bushing is able to withstand high temperatures up to 570 F
The self-lubricating feature allows bearings to be used where oiling is difficult, expensive to implement, and where grease/oil cannot be used. Excellent lubrication is achieved even under high loads at low speeds.
Self lubrication with specially embedded solid lubricants reduces friction. Coefficient of Friction: 0.04 to 0.2

Technical Data

Applications

Project agricultural machinery
Agricultural Expertise
Project construction machinery
Construction Machinery Expertise
Project forestry
Forestry engineering specialist report
Drive technology project
Practice Mechanical Face Seal
Drive technology specialist report
Mechanical engineering project
Mechanical engineering specialist report
Automotive project
Automotive specialist report
Project aerospace

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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