Our range of no lead, no oil self-lubricating polymer plain bearings are designed to offer superior performance without the need for additional lubrication or harmful lead components. These bearings are made from high-quality polymer materials that possess excellent wear resistance and self-lubricating properties, ensuring smooth and reliable operation in various industrial applications.

One of the key features of our bearings is their compliance with RoHS (Restriction of Hazardous Substances) certification. This means that they do not contain any harmful substances such as lead, mercury, cadmium, or other restricted materials, making them safe for both human health and the environment.

The absence of lead in our bearings not only complies with environmental regulations but also enhances their performance. Lead is known to have negative effects on bearing materials, reducing their durability and lifespan. By eliminating lead from our products, we ensure longer-lasting and more reliable bearings.

Moreover, the self-lubricating properties of our polymer bearings eliminate the need for regular lubrication, reducing maintenance costs and downtime. This feature makes them particularly suitable for use in environments where lubrication is difficult or impractical, such as in dusty or wet conditions.

Our polymer plain bearings are precision-manufactured to ensure a perfect fit and optimal performance in a wide range of applications. Wh you need bearings for machinery, automotive components, or any other industrial use, we have the right solution for you.

We pride ourselves on our commitment to quality and customer satisfaction. Our products are thoroughly tested to ensure they meet the highest standards of performance and reliability. With our RoHS-certified no lead, no oil self-lubricating polymer plain bearings, you can enjoy improved equipment performance, reduced maintenance costs, and a safer working environment. Contact us today to learn more about our products and how they can benefit your industrial operations.

POM Composite Bearings | Self-lubricating Bronze Bushings

The POM composite bearing trademark denotes a range of sliding bearings produced from a material with a composite structure. The backing consists of carbon steel onto which a porous layer of bronze is sintered and then impregnated with a co-acetal plastic. The polymeric surface has indentations in which the lubricating grease lies and protects the mating surface. The main pom composite bearings in the pom composite bearing range are the cylindrical bushings (DIN 1494), but thrust washers and strips are also available as well as special parts made to customer specifications.

The POM composite bearing is suitable for rotating and oscillating movement, less maintenance requirements due to the long re-lubrication intervals, lower wear, lower susceptibility to edge loading, no absorption of water and therefore no swelling, good damping behaviours, good resistance to shock loads.

POM Composite Bearing Material

POM Composite Bearing Typical Application

• Automotive: suspension joints, kingpin assemblies, automobile driving joint hinges, steering and other linkages, articulation joints, and rear chassis hinges.
• Machine Tools: spindles in drill, grinding, and milling machines, and ram guide plates in multi ram presses.
• Agricultural Equipment: gearboxes, clutch assemblies, bale trips and wheel caster swivels for bale accumulators, front axle pivot bearings, steering idler box bearings and kingpin bearings for harvesters.

In the food, medicine and other mechanical industries, the use of environmentally-friendly oil-free lubrication bearings not only reduces the impact of lubricating oil on the working environment during maintenance, but also prevents the pollution of heavy metals to pom composite bearings products.

Boundary lubricated lead-free bearing, this pom composite bearings and VSB-2 have the same structure and performance, at the same time has the environmental protection function, under the boundary lubrication condition can be used for a long time without oiling, wear resistant layer surface has oil storage pit. POM composite bearings Products are widely used in gold processing machinery, mining machinery, water conservancy machinery, automobile, construction machinery, agricultural machinery, steel rolling industry, food machinery, pharmaceutical machinery, tobacco machinery, etc.

We choose low carbon steel as the base of the bearing

A brief introduction to polyformaldehyde (POM) materials

1. With high mechanical strength and rigidity;
2. The Maximum fatigue strength;
3. Good environmental resistance and organic solvent resistance;
4. Strong resistance to sustained impact;
5. Widely used temperature ranges from -40℃ to 120℃.
6. Good electrical properties.
7. Good recovery.

8. With their own lubrication, good wear to hold;

9. Excellent dime

Melting point of 175 ° C
Density 1.42 g/mL at 25 °C
Flash point 158 °F storage condition 2-8°C

Self-lubricating oil-free pom composite bearing structure composition

No oil, POM Composite Bearing Bronze Bearing Characteristics

You can choose the structure of your POM composite oil-free self-lubricating bearings

You can customize various POM composite oil-free self-lubricating bearings from us, and design related drawings

Here you can choose the pom composite bearing size of the type part, more sizes you can refer to PDF.

Click here for PDF for more pom composite bearings information

Wrapped Composite Sliding Bearing .pdf

POM Composite Bearing Application field

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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