Engineering: Our team of highly skilled engineers is dedicated to delivering innovative solutions in the field of engineering. Wh it's developing custom designs, optimizing production processes, or ensuring the highest quality standards, we strive to exceed expectations.

Custom Fabrication: We specialize in custom fabrication services tailored to meet the unique needs of each client. Our fabrication capabilities include precision machining, welding, and assembly, enabling us to create custom components and assemblies that meet specific requirements.

Manufacturing: Our manufacturing facilities are equipped with state-of-the-art machinery and technology, enabling us to produce plastic polymer plain bearings with precision and efficiency. We follow strict quality control measures to ensure consistent product quality and reliability.

Plastic Polymer Plain Bearings: As a leading manufacturer of plastic polymer plain bearings, we offer a wide range of products that are designed to meet various application requirements. These bearings are known for their durability, corrosion resistance, and low-friction properties, making them ideal for use in a wide range of industries.

By combining our engineering expertise, custom fabrication capabilities, and manufacturing proficiency, we are able to provide our clients with superior plastic polymer plain bearings that are tailored to their specific needs. We pride ourselves on our ability to deliver exceptional products and services that help our clients achieve their goals.

Polymer Plain Bearings

Custom Fabrication | Manufacturing Plastic Polymer Plain Bearings Shaft Dia Length Housing Bore Shaft Dim’s Installed ID Installation Dimensions

Special manufacturing
We can offer special sizes, shapes, forms or lengths upon request. Please contact us for a quotation or more information.

Axle/shaft – Bushing tolerance To the H9 tolerance of the slide bearing we recommend shafts with tolerance e7 or f7. If h-shafts are used, the bearing inner diameter should be machined up to tolerance F7.

High speed sleeve, flange and thrust bearings, zero lube required Bushings Liner is a enhanced wear for use in lubricated or unlubricated environments

To provide efficient self-lubrictaing bearings for sports machinery

MOTORCYCLE and BICYCLE mountain bike suspension bushings & bearing

Product Description

Overview

Viiplus Manufacture Bearings For Exceptional Performance.

China Bushings parts are used in high-powered engines that require durability, riding comfort and safety at high speeds.

Wh you are designing wind power equipment for industrial energy applications or you are building a bicycle, we’ve got the dependable bushings you need.Our bushing high-performance products are manufactured to the exacting standards needed for a specific application.

VIIPLUS has the experience and expertise in advanced materials to provide each customer with the ideal bearing solution for new challenges.Maintenance-free bearings are durable, environmentally friendly, grease-free, and can withstand high loads, high speeds, and high temperatures.Our high performance self-lubricated sliding bearings also provide superior performance in wet, dirty environments, making them ideal for a variety of entertainment applications.From bicycles, snowmobiles and mountain bike bushing suspenders to fishing gear, ski gear, recreational water sports gear, golf carts and more.

VIIPLUS With professional experience and knowledge, to provide each customer with the ideal sliding bearing self-lubricating bearing solutions.

Self-lubricating bearings for sports machinery are durable, environment-friendly and oil-free, which can bear high load, high speed and high temperature.All kinds of self-lubricating sliding bearings can also provide excellent performance in the wet and dirty environment, making it an ideal choice for all kinds of entertainment equipment applications.Bike and mountain bike suspenders, fishing gear, recreational water sports gear.

Self-lubriating bearings coatings are specifically formulated to provide engineers with greater design freedom permitting them to go beyond performance boundaries, irrespective of shape or material.
Self-lubricating bearing are primarily used for bearing arrangements where heavy loads have to be supported and where rotational or oscillating movements are relatively slow.

Even in the most demanding environments, customers can rely on the unique features of VIIPLUS sliding bearings, including low friction, high wear resistance and high reliability.
Because of their good sliding properties and compact design, these plain bearings are particularly suitable for bearing arrangements where:
Maintenance-free operation is a prerequisite
There is a risk of lubricant starvation
Lubricants cannot be used or are forbidden
Space is limited.

Self-lubricating bearing, an essential part of machinery

Jiashan county, zhejiang province, where VIIPLUS is located, is the national production base for self-lubricating bearings, which produces 70% of the country's self-lubricating bearings.

The construction machinery industry of China's self-lubricating bearing market in the United States has ushered in a big turning point.

One figure is this: at present, the global market size of rolling bearings is about 270 billion RMB, while the market size of self-lubricating bearings is between 15 billion yuan and 20 billion RMB.

VIIPLUS provides a full range of self-lubricated bearings and their solutions for the main machine factory, consolidating the company's leading position in the self-lubricated bearings export engineering machinery industry.Over the past year, commodity prices have risen, upstream companies have recovered and the global economy has slowly recovered.

Bearings are divided into two categories, rolling bearings and sliding bearings.Generally speaking, under the same conditions, sliding bearing wear than rolling bearing, but sliding bearing bearing capacity is higher, more convenient to use.

What is "self-lubricating bearing"?

Traditional bearings cannot work without lubricating oil. Once the oil is cut off, the loss will increase rapidly. Therefore, the maintenance cost is very high and the application field is also limited.
And "self-lubricating bearing", is a rising star bearing session!

The U.S. -based , Japanese Bronze Bushing and DAIDO are the world's top three producers of self-lubricated bearings, with strong positions in aerospace, automotive and transportation.

Advantages

Smaller friction coefficient, higher wear resistance, longer service life, and basically does not need to add lubricating oil in use, which is a revolutionary technology.

The reason is that self-lubricating bearings are equipped with solid lubricant, which will form a permanent solid lubrication film on the surface.

The advantages of this film are really mouth-watering. Not only is the maintenance cost reduced, but also the bearing itself can be made smaller, lighter quality, the prospect is exciting.
For example, in the structure of machinery and automobile, a lot of bearings are used for various parts, and many of them need to be replaced based on the consideration of lightweight and precision.

Variable speed drives and air conditioning compressors are replaced by self-lubricating bearings from rolling bearings, replacement rate of 80%.

Lead-free self-lubricating bearing

Compared with other metals, lead has a low coefficient of friction and is a good self-lubricating bearing material. However, as we know, lead is a toxic heavy metal, which has been gradually abandoned in the world.Instead, lead-free self-lubricating bearings are used

Stainless steel woven fabric and textile fiber bearings 316L

After trial and error, VIIPLUS found an alternative to lead -- stainless steel woven fabric and textile fiber bearings, successfully overcoming the material problem and establishing itself as an industry leader.

Viipls Self-Lubricating Bearing Main Products Rang

1.Metal plastic polymer self-lubricating rolling bearing

It is the flagship product, it has excellent mechanical bearing capacity, especially suitable for non-refueling and non-refueling conditions, the use of a car can reach more than 30 parts.

​It is also very low maintenance costs, and corrosion resistance, so often in the outdoor work of the truck, platform car, will also be a large number of installation of this bearing.

2.Bimetal boundary lubricated rolling bearing

Self - lubricating bearings are mainly copper, steel as the representative of the raw materials.

Foreign orders of VIIPLUS increased significantly, and our company's export proportion also reached 57%.

3.Metal base self-lubricating bearing

with wear resistance, impact resistance, high load characteristics, needless to say, is also mainly used in the construction machinery industry, it is no wonder that productivity utilization is high.

A promise tomorrow is worth a lot less than trying today

The research on self-lubricating bearing of mechanical products is a process of continuous deepening, which is a process of constant screening, selection, boring and spending a lot of time and energy.

Description

Rolling bearing is a kind of rolling bearing, which is based on high quality cold-rolled steel plate and sintered with porous spherical bronze powder in the middle, and then sintered with a mixture of and fiber on the surface of porous spherical bronze powder, and rolled.
This product has the characteristics of small friction coefficient, abrasion resistance, good corrosion resistance and self-lubrication.Using this product can reduce the cost, reduce the mechanical volume, avoid the phenomenon of shaft biting and reduce the mechanical noise and other characteristics.
This product has been widely used in various mechanical sliding parts, such as printing machine, elevator, textile machine, tobacco machine, fitness machine, hydraulic conveyor, micro-motor, solenoid valve, automobile and agricultural and forestry machinery.

Application

Self-lubrictaing bearings for automotive applications include: wiper, shock absorber, seat, gearbox, brake, steering, convertible top, interior, pillar, lever, pedal and other applications.

Our advantages

• Maintenance-free operation
• No lubrication required ( composite)
• Initial lubrication required (POM composite)
• Minimum wall thickness, minimum space requirements
• Accommodation of heavy loads
• Wide range of temperatures
• Good sliding properties
• Virtually no stick-slip
• High wear resistance
• Less sensitive to edge loading (POM composite)
• No machining required.

1.a wide range of efficient bearing materials and solutions to meet the most demanding application requirements.

2.compact, lightweight solutions reduce fuel consumption and emissions.

3.seat: seat adjuster and height adjustment mechanism.

4.continuous innovation of technologically advanced products, systems and tools to maintain our leading position in high-performance bearing technology.

5.our application specialists provide technical support and customer-specific bearing designs to provide comprehensive customer support.

Create a superior driving experience

In recent years, the requirement of automobile equipment operation has been increasing.Our lead-free bearing material, with enhanced performance, can meet the most stringent performance requirements, better than ball bearings (limited space and weight, high load and swing movement may cause damage).
Bearing has many advantages, creating superior driving performance:
· long service life, reliable and smooth operation
· high wear resistance
Self-lubricating,
· low friction coefficient, low loosening torque and no stick-slip phenomenon
· compatible with many standard oils and lubricants
· precision, dimensional stability · our application specialists provide technical support and customer-specific bearing designs to provide comprehensive customer support.

Compsoite bearing standard sizes

The standard range of composite plain bearings is very comprehensive and covers almost every standard size. This range comprises straight and flanged bushings, thrust washers and strips.

Sleeve Bearings:

I.D. = inner diameter

O.D. = Outer diameter

F.D. = Falnge diameter

I.D. = inner diameter

O.D. = Outer diameter

Innovation

Discover the innovative process that keeps us a step ahead.

Certificates

View and download our global certificates.

Quality Driven

Quality and environmental respect are essential to our core values.

Lead Time

We are committed to on-time delivery.

Team of Experts

Read interviews with our experts as they share their experiences.

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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