Precision Assembly Dimension & Size Composite Metal Bearings for Fluid Power Systems Pump Bushes are designed to meet the exacting requirements of fluid power systems. These bearings, constructed with a composite of and metal, offer superior wear resistance and corrosion resistance, ensuring long-term reliability and durability. The precision assembly dimensions and sizes of these bearings guarantee a precise fit and optimal performance in pump bushes. The composite material combines the strength and rigidity of metal with the lubrication and low-friction properties of , resulting in efficient and smooth operation of fluid power systems. Overall, these precision-engineered bearings are an ideal choice for fluid power systems pump bushes, delivering reliable and efficient performance in various industrial applications.

Polymer sliding bearing alloy bearing assembly dimension precision

Metal composite bearings have been relatively successful in replacing traditional lead-bearing bronze or bimetallic bearings in many lubrication applications.But until recently, funds are still unable to match the metal genera - polymer sliding bearing alloy bearing assembly dimension precision, which limits its application in specific areas, in these areas, the axial clearance control to the improvement of operation efficiency, or noise, vibration and no comfort plays an extremely important role.

VIIPLUS Bearings supply a variety of pump metal bushings including brass bushings, steel bushing, & bronze bushings. If you already know which type of metal bushing is right for your application, you can quickly navigate to it below for more information:
Self-lubricated bearings have been used in vane pumps and the results show that the metal polymer composite straight liner has excellent tribological performance under dry, edge and hydrodynamic lubrication operating conditions, providing excellent pump reliability.

In order to improve the reliability of the pump, VIIPLIUS provides a self-lubricating bearing solution.

Provides a wide variety of self-lubricating sliding bearings to meet or even exceed the needs of a variety of applications.It is used in rotating, swinging and sliding motions and in a variety of difficult operating conditions such as high static or vibrating loads, temperature limits and friction conditions.
VIIPLUS SLIDING BEARING series self-lubricating bearings can meet the unique application requirements of the fluid power industry.We can provide complete solutions, reliable performance under high load and high speed, can resist cavitation and chemical corrosion, suitable for today's advanced fluid power applications, in gear pump, piston pump, vane pump, compressor, cylinder and other industries have a wide range of application.
The benefits of self-lubricating straight bearings are as follows:
Self-lubricating bushing with -based low friction bearing cladding for extended service life to avoid lining and shaft damage while operating under dry or boundary lubrication conditions
Thin - walled, single - piece structure allows for compact, lightweight pump design
Easy to assemble in pump without expensive tools and equipment
Environmentally friendly lead-free bearing assembly.

Bush for plunger pump and motor bearing

This requires self-lubricated bearings to provide high wear resistance, fatigue and flow erosion hydrodynamic composite bearing bearing bush solutions
The technical requirements and specific functions of sliding bearings in this application are the most demanding requirements of any high-power hydraulic components.In addition to withstand the temperature range in - 50 ℃ to + 140 ℃ as well as the wide range of lubricant viscosity change, must be able to withstand extreme high load bearing oscillation velocity and boundary lubrication conditions.

VIIPLUS Lubricating and sealing characteristics of the guide bearing were researched by the aid of hydrodynamics and tribologys.

Advantages of high performance bearings

Maintenance-free bearings are used in common hydraulic fluid and many types of water emulsion conditions, suitable for vane pumps, gears, plunger pumps and motors.In addition to their excellent frictional and anti-wear properties, they are stable and reliable under required loads and speeds, making them suitable for many hydrodynamic applications.

Application of vane pump self - lubricating bearings & bushings

The rotary vane pump provides hydraulic power for the automatic transmission.
Located on the transmission cover, they pull oil at low pressure from the sump at the bottom of the transmission and feed it at high pressure to the hydraulic system, the gearbox cooler, and the torque converter.
The blade rotor is supported by bearings on the front and rear plates.
When mounted on the backplane, needle roller bearings may fail due to lack of oil, especially after a long rest in different climatic conditions or during repeated start and stop operation.

To provide customers with advantages

1.Improve energy efficiency
2.Maintenance free,
3. Reduce noise and assembly costs
4.Replace expensive rolling bearings

Technical Data

· Metal-Polymer Composite Bushing Material
· Steel back + Porous Bronze Sinter +
· + Fillers

* Depending on operating conditions

Bearing forms available in standard dimensions
· Cylindrical bushes
· Flanged bushes
· Sliding plates
· Thrust washers
· Flanged washers



Metric bearings and imperial bushings made to order: Standard bushing forms in special sizes, half-bushings, stamped/deep drawn shapes, bearings with locating notches, lubricant holes and grooves, customized 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.