Our POM bushes are self-lubricating plain bearings that come in a split type design and standard size, making them suitable for a wide range of applications. The POM material used in these bushes offers excellent wear resistance and mechanical properties, ensuring smooth and reliable operation.

The self-lubricating feature of these bearings eliminates the need for regular lubrication, reducing maintenance requirements and operational costs. The split type design allows for easy installation and removal, making maintenance and replacement a breeze.

The standard size of these POM bushes ensures compatibility with a variety of machinery and equipment, making them a versatile and cost-effective solution. Wh you need bearings for industrial machinery, automotive components, or any other application where self-lubricating, split-type plain bearings are required, our POM bushes are an excellent choice.

Contact us today to learn more about our POM bushes and how they can enhance the performance and reliability of your machinery and equipment. We are committed to providing you with the best possible solution for your specific needs.

Self Lubricating Plain Bearing Dry Sliding Bushing

VIIPLUS bearings utilize special polymer liners for self-lubrication and improved wear properties. Each material has a specific wear rate dependent on the speed, load, temperature, lubrication and hardware of the application. The metal backingsupports liner materials made to withstand high loads, speeds and adverse environments. The advantage of the VIIPLIUS design is that even if wear-thru occurs in the liner,

the supporting interlayer is a self-lubricating material as well.

Sintered porous bronze on metal substrate with POM calendared into the dynamic wear surface.Requires boundary lubrication for optimum performance . High PV rating,Low speeds. Commonly used in mining equipment, rolling mills, skilifts and other applications where bronze bushings are utilized.

International supply of technical industrial goods, in particular wrapped sleeves (self lubricating or for lubrication), personalized POM bushes,

POM composite dry sliding bushings Suitable for rotational and vibrational movements, less maintenance requirements due to longer relubrication intervals, shorter wear,lower susceptibility to edge loading, no absorption of water and therefore no swelling, good damping behaviours, good resistance to shock loads.Pom composite dry sliding bushing, Ring maker, Mfg Bushes, The Pom composite dry sliding bushing is based on a composite material with 3 firmly bonded layers: steel as a base, spherical sintered bronze powder as an intermediate layer and modified POM as a coating layer. It is well suited to low speeds, difficult operating conditions and normal temperatures, it saves costs and extends its service life with the normal replacement of all copper rings.

It is especially suitable for rotating and swaying motion under heavy load and low speed, as well as opening and closing under load, which is not easy to form fluid lubrication.Under the condition of boundary lubrication, it can be used for a long time without refueling and maintenance.The plastic layer on its surface can leave a certain amount of margin in the shaft sleeve forming process, and can be processed by itself after pressing into the hole, so as to achieve a better assembly size.
At present, it is mainly used in metallurgical machinery, mining machinery, water conservancy machinery, automobile chassis, construction machinery, agricultural machinery, steel rolling machinery and so on.

The superior performance of smooth polymer metal rings is based on their unique composite structure:
·Impregnated anti-friction coating enriched with and fillers or extruded thermoplastic tape
·Porous sintered bronze spacer for high wear resistance
·Steel or bronze support for high mechanical resistance

The Dry sliding Bushing sleeve can be used in rotating and swinging applications. Lower maintenance requirements thanks to long relubrication intervals. Less wear, less susceptibility to edge loading and no water absorption. THX has good damping qualities and is resistant to shock loads.

Material

·Support material Steel tin-plated
·Intermediate layer Sintered bronze
·Sliding layer Acetal resin / POM

Performance Advantages

·Improve efficiency with pom composite dry sliding bushing low-friction bearings

·Extended service life

·Zero maintenance

·Compact, lightweight designs

·Reduced noise

·Quick, simple assembly

·Improved operational efficiency

Technical Data

Bushing Type

1. Straight bushings

2. Flange bushings

3. Thrust washer

4. strip

5. Non-standard products are also avalidable

Metric Sizes – Pre-Lubricating Bearings

Tolerance

·Housing Ø H7
·Bushing inner-Ø after mounting In the range of D
·Shaft tolerance H8

Operating Performance

Use Note

·Due to their good sliding properties and compact design, these composite dry sliding bushing are particularly suitable for pom composite dry sliding bushing arrangements where:
·Maintenance-free operation is a prerequisite
·There is a risk of starvation of the lubricant
·Lubricants may not be used or prohibited.
·Space is limited.

Pom composite dry sliding bushing are mainly used for bearing devices where it is necessary to withstand heavy loads and where rotational or oscillatory movements are relatively slow.

Application

Recommended for applications involving intermittent operation or boundary lubrication.

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...

The pom composite dry sliding bushing is especially well suited for applications where lubricant cannot be supplied continuously or repeatedly.

Availability

Standard cylindrical bushings, thrust washers, flanged bushing and strips are available.

Metric bearings and imperial bushings made to order: standard bushing forms in special dimensions, half-bushings, special shapes obtained by stamping, bearings with locating notches, lubricant holes and machined grooves, customized bushing designs

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.

• 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.