Multi-layer bearings, featuring a carbon-based polymer plain bearing construction, offer exceptional performance and durability across various industrial applications. The innovative design integrates bushings with a steel backing and bronze POM material, delivering a robust and reliable bearing solution.

The carbon-based polymer plain bearings provide excellent wear resistance and low friction, ensuring smooth and efficient operation. The bushings further enhance these properties, offering superior lubrication and reduced heat generation.

The steel backing provides a strong and stable support for the bearing, resisting deformation and ensuring precise alignment. The bronze POM material adds additional strength and durability, enhancing the overall performance of the bearing.

The multi-layer construction of these bearings allows for optimal performance in different operating conditions. Wh used in high-speed or high-load applications, these bearings maintain their integrity and reliability, ensuring long-term performance.

Overall, the multi-layer bearings with carbon-based polymer plain bearings, bushings, steel backing, and bronze POM material offer a comprehensive and dependable bearing solution for industrial applications, delivering exceptional performance and durability.

Material: Steel + bronze sinter + POM with lubrication indents orange color

Bushings Material: Steel + bronze sinter + POM (Polyoxymethylene) with lubrication indents

This description pertains to the composition of bushing materials. Bushings are often used in bearings or other mechanical components, where the choice of material is crucial for the component's performance and lifespan. Here's an explanation of the different parts mentioned in the description:

Steel: Steel is a commonly used mechanical material known for its strength and wear resistance. In bushing materials, steel may serve as the primary structural support and provide strength.

Bronze Sinter: Bronze is a copper-based alloy typically containing other metal elements like tin, lead, or zinc to enhance its strength and hardness. Sintering is a process where powdered metal or alloy is heated to near its melting point and then cooled to form a solid material. Bronze sinter combines the strength and wear resistance of bronze with the advantages of the sintering process, making it suitable for applications involving high loads and high-speed operations.

POM (Polyoxymethylene): POM is an engineering plastic known for its excellent mechanical properties, wear resistance, and chemical resistance. In bushing materials, POM may be used to provide lubrication, reduce friction, and extend the life of the component.

Lubrication Indents: Lubrication indents are small structures designed on the surface of the bushing to hold lubricants like grease or oil. These indents help form a lubrication film between the bushing and adjacent components, reducing friction and wear, and improving overall efficiency and lifespan.

In summary, this bushing material combines the strength and hardness of metals with the lubricating properties of engineering plastics, making it suitable for various applications requiring high-performance bearings or mechanical components.

Multi-layer bearings Polytetrafluoroethylene Bushings

Multi-layer bearings are available in various combinations of sliding surface.

These are available both as maintenance-free and requiring lubrication.

Cylindrical Sleeve Bushes

• Rather high load capacity.
• Can be used where effective lubrication does not exist.
• Low friction even without lubrication.

Developed on the base of VSB-10 gleitlager bushings, suitable for dry running, low coefficient of friction, lower wear , good sliding characteristics, forming a transfer film can protect the mating metal surface, suitable for rotary and oscillating movement, high chemical resistance, low absorption of water and swelling.

Carbon Steel + Copper Powder + (RED)

· Metal-Polymer Composite Self-lubricating Bushing Material
· Steel Back + Porous Bronze Sinter +
· RED

Technical Data

Bearing forms available in standard dimensions

· Cylindrical bushes
· Flanged bushes
· Thrust washers
· Flanged washers
· Sliding plates

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.

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.

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.

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.