Self-lubricating steel backed bushing bearings combine the advantages of many conventional lubricated metal plain bearings - especially high load capacities and dimensional stiffness - with the design freedom of self-lubricating materials, including the ability to perform well beyond conventional lubricants.

Custom Solutions for Demanding Technical Requirements

We work closely with our customers to develop new self-lubricating bronze bushings solutions that are then added to our list of catalog bronze bushing products.

Self-Lubricating Bronze Bushing, Steel Backed Plain Bearing

Metal-Polymer Bearings Bearings Replacement sleeve

Discovery bushing bearing, relating to plain bearings and self-lubricating bushings material and bushing price ...

Plain-Bearing - Bore size, OD size, Length size, Material

80160/ Plain Bearing - ID=242, OD=247, Length=100mm
80161/ Plain Bearing - ID=300, OD=305, Length=100mm

VIIPLUS SLIDING BEARING Our range offered SME includes Metal Bushing, Steel Sleeve BushingThrust Washer, Bronze Graphite Plate, Valve Gearbox Bushings, and more. Besides these, we are also rendering Metal Coating Self-lubricating bearing Strips, Material Export Service and more.

Plain bearing materials Plain bearing Strips, Slide paths PAS Strips Material in detail Strip Metric Streifen, Gleitbahnen | VSB-10

Impregnated with our own proprietary lubricant, these bushings are composed of and special material uniformly dispersed within polyacetal plastic resin, a plastic material offering excellent bearing characteristics.

VSB-10 Strips, Slide paths PAS

Table of Contents
Material information
Plain bearing production
Characteristics: maintenance-free and robust
Material composition
Models and tables of dimensions
More information

Plain bearing Bearing Material production

Standard designs are:

Bushes PAP...

• Cylindrical bushes

​Flange liners PAF..

• Collar bushes

Thrust washers PAW..

• Thrust washers

• Strips

Characteristics of VSB-10 strips material

1.Very low stick-slip tendency

2.Low wear

3.Good chemical resistance

4.Low friction value

5.No tendency to weld to metal

6.Extremely swell-resistant

7.Does not absorb water

Preferred areas of application

1.Maintenance-free operation under dry-running conditions

2.Rotating or oscillating movements

3.Up to a velocity of 2 m/s

4.Linear movements

5.Temperature range -200 °C to 280 °C

Material composition

Strips Material composition

• Layer system 10 srtips

1. Running-in layer

matrix with bulking agent¹
Layer thickness [mm]:	max. 0.03

2. Sliding layer

Tin-lead-bronze
Layer thickness [mm]:	0.20–0.35
Pore volume [%]:	approx. 30

3. Bearing back

Steel
Steel thickness [mm]:	Variable
Steel hardness [HB]:	100–180

1 The pores of the sliding layer are also filled with this lubricant mass.

Models and tables of dimensions

with steel back, maintenance-free

If these material sections are used to create slide paths, they have the following main functions:

1.Absorbing and transferring forces acting vertically to the running surface

2.Fixing moving components to each other

3.Ensuring guidance accuracy for axial movements over the entire service life

Strips are available in two material groups:

VSB-10 Steel + Bronze Powder + /Fibre Bushings

1. /Fibre mixture thickness 0.01~0.03mm. It is the contact surface for the rotating shaft. Minute partides of the layer and the sintered bronze material combine to create a solid lubricant film, which coats the shaft.

2. Sintered bronze powder thickness 0.20*0.35mm,A special composition of powdered copper is thermally fused to the steel backing. This contact layer acts as an anchor for the layer and conducts the thermal build up away from the bearing surfaces.

3. Low-carbon steel backing. Setting the foundation of the bushings, the steel back provides exceptional stability, load carrying and heat dissipation characteristics.

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

* Depending on operating conditions

Bearing forms available in standard dimensions

• Cylindrical bushes
• Flanged bushes
• Thrust washers
• Flanged washers
• Sliding plates

Metric bearings and imperial bushings made to order: standard bushing forms in special dimensions, half-bushings, special shapes obtained by stamping or deep drawing, customized bushing designs

This material meets the demanding criteria for long life and maintenance free performance with or without lubrication.
Automotive: tractors, combines, crop sprayers, earth-movers, graders and other construction, auto machines, specific uses in power steering cylinders, steering gear thrust washers, disc brakes, calipers and pistons, shock absorbers, governor linkage, windshield wiper motor, tilt gear assemblies...
Business machines: photocopy machines, typewriters, mail sorters, postage meter systems, computer terminal printers and peripheral equipment, automatic printing devices, mail processing machinery...
Hydraulics and valves: pumps including gear, rotary, water, axial piston, and other types, ball, butterfly, poppet steam, and other valves and valve trunnions...
Home appliances: tape recorders, refrigerators, air conditioners, cleaners, polishers, sewing machines, ovens, dishwashers, clothes washing machines...And materials handling, marine engine, packaging, textile equipment, tools...etc.

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a project with an Application Engineer

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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