The bimetal washer embedded with graphite plugs is a unique mechanical component that combines the strength and durability of two different metals with the lubricity and wear resistance of graphite. This innovative design ensures optimal performance in applications requiring high precision, reliability, and extended service life.
The bimetal washer itself consists of two layers of metal, typically chosen for their specific material properties. One layer may be selected for its strength and durability, while the other layer may be chosen for its corrosion resistance or other desired properties. The combination of these two metals allows the bimetal washer to perform optimally in a wide range of environments and applications.
Embedded within the bimetal washer are graphite plugs. Graphite is a natural form of carbon that exhibits excellent lubricity, self-lubricating properties, and wear resistance. When graphite is embedded in the bimetal washer, it provides a continuous lubrication source that reduces friction and wear between moving parts. This results in smoother operation, less wear, and longer service life for the mechanical system.
The graphite plugs are strategically positioned within the bimetal washer to maximize their effectiveness. They are typically embedded in high-wear areas or in areas where friction is a concern. The size, shape, and number of graphite plugs can be customized based on the specific requirements of the application.
The bimetal washer embedded with graphite plugs is commonly used in automotive, aerospace, and industrial machinery applications. Its ability to provide continuous lubrication and wear resistance ensures smooth and reliable operation of moving parts, even under extreme conditions. This innovative design represents a significant improvement over traditional metal washers, offering superior performance and durability in demanding applications.

Bimetal Washer Embedded Graphite Plugs

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Bimetal Washer Embedded Graphite Plugs,

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Bimetal Washer Embedded Graphite Plugs Feature

Bimetal Washer Embedded Graphite Plugs-08G is a kind of steelhead bronze alloys-based bearing that is embedded with a particular formulation of solid lubricants. Owing to the high strength, high load capacity, and the spirally distributed diamond embedded with solid lubricant. With a lubrication area of 25% on the bearing surface up to,, the bushing shows better performance in good lubrication and anti-wear. This type of bearing is particularly applied in gearbox for automobiles, generators, cranes, and machines for the metallurgical industry.

BIMETAL GRAPHITE WASHER

Bimetallic Thrust Washers

Sintered SAE797 Layer + Steel Backing + Copper Plating / Tin-Plating
Sintered SAE799 Layer + Steel Backing + Copper Plating / Tin-Plating
Sintered SAE48 Layer + Steel Backing + Copper Plating / Tin-Plating
Sintered SAE783 Layer + Steel Backing + Copper Plating / Tin-Plating

The bimetallic bearing has steel shell and sintered bronze lining. Its base material is high-quality low-carbon steel. Surface of the composite bearing is sintered with low-friction copper alloy including CuPb10Sn10, CuPb6Sn6Zn3, CuPb24Sn4, CuPb30, AlSn20Cu and CuSn8Ni.

Physical and Mechanical Properties

Bimetallic Bearing​ Applications

1. Engineering Machinery
The bimetallic bearing for engineering machinery is applicable to the tension wheel bush, towing wheel bush, and the track roller bush of chassis running gear.

2. Automotive Industry
As a kind of automobile bearing, this product can be used in the balance shaft bushing, steel pin bushing, knuckle pin bushing, connecting rod bushing, valve rocker arm bushing, camshaft bushing, differential bushing, transmission bushing, thrust washer, and the main shaft bushing of internal combustion engine.

3. Other Applications
In addition, this product is ideal for use in the side panels of plunger pumps and the side panels of gear pumps, etc.

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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