The Oil Hole Composite Yellow Polymer Plain Bearings with Copper Coating are designed for applications that require excellent wear resistance, corrosion protection, and lubrication properties. The yellow polymer material, combined with a copper coating, provides superior durability and performance in various industrial environments.

The copper coating on the guide sleeve not only enhances corrosion resistance but also improves heat dissipation, ensuring the bearing maintains optimal performance under high-temperature conditions. The integrated oil holes allow for the application of lubricant, further reducing friction and wear, while also ensuring the bearing remains well-lubricated during operation.

These composite plain bearings are precision-manufactured to ensure tight tolerances and smooth surfaces, promoting smooth rotation and minimizing vibration. The yellow polymer material is also lightweight and offers good shock absorption, making it a suitable choice for applications where weight reduction and impact resistance are important.

In summary, the Oil Hole Composite Yellow Polymer Plain Bearings with Copper Coating are a reliable and high-performance option for applications requiring a durable and well-lubricated guide sleeve.

Oil-free self-lubricating environmental protection bearing yellow polyformaldehyde material with wear-resistant sleeve of oil hole composite bearing guide sleeve copper sleeve

Wrapped sliding bearing, wrapped bushing, steel/POM sliding layer, DIN 1494/ISO 3547, Low-maintenance

Standard Products Inch Sleeve Bearings and Inch Metric Sizes (Metric Inch Thrust Washers and Metric Sizes) Inch Flanged Bearings and Metric Sizes Flat Thumb, Inch, Inch, Inch and Foot Lengths Bearing Socket Sleeve Bearing Burnishing ID Reaming, Turning, Boring assembly broaching. Static the friction coefficient of the first movement can be greater for a long period of rest under load. Dimensions and order: Metric dimensions Metal polymer Polymer self-lubricating and maintenance-free Bearings with bearings Flat-strip solutions Material Inches Dimensions

Metal Composite Solution

Excellent dust performance and harsh environment
Excellent resistance to chemical reaction
Excellent corrosion resistance
Good fatigue strength
Good wear resistance
Can be machined to meet tighter tolerances
Lead-free material according to RoHS

Typical POM Bearing Applications
Self-lubricating bearings, bearings, washers, etc. Suitable for:

rotating
hesitant
reciprocating
Sliding movements mainly for
Cars:Tractors, combines, sprayers, earthmoving machines, graders, etc. Construction vehicles, cars.

Question: Are you a trading company or a manufacturer?
A: Our management has been export-oriented for over 10 years, and we have our own bush production plant. VIIPLUS is always professional and reliable. Our advantages are the integration of several resources, a reliable quality guarantee and an excellent level of service. We are always responsible for our products.
Q: Delivery time?
A: Generally 10-25 days after order. It depends on the quantity.
Q: Do you produce samples? Is it free or extra?A: For standard products, we produce samples free of charge for our customers. And the express costs will be burdened by the customer, but can be returned after the order is placed.
Q: How to ensure the quality?A: We produce according to the confirmed technology or drawings for every order for our customers. And our factory has a strict quality control. We check the goods during production at certain intervals and carry out the final inspection before the goods are packed.
Q: Do you only want to serve customers with small orders?
A: We are always happy to grow up with all our customers, big or small. We hope that our customers get stronger and stronger to be with us.

The lubricating film that the bearing surface is able to maintain during long periods of creeping contact with a shaft or a flat surface ensures negligible wear. Should the bearing
be authorized to run after the film of lubricant has disappeared, some wear will occur; but there will be no damage to the mating surface until the surface of the bronze substrate is exposed.

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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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