sliding bushings are suitable for dry running, low friction, less wear, good sliding properties, forming a transmission layer that can protect the mating metal surface, suitable for rotating and oscillating motion. sliding bushings has very high chemical resistance, low water absorption and swelling. It also copes well with lubrication.

Wrapped composite bearing with sliding layer - Maintenance-free

• Dry slide bearing requires no lubrication
• High static and dynamic load capacity

Steel + Porous Bronze Sinter + + Pb

• 0.01 ~ 0.03mm fiber blend, lead-free, provides an excellent initial transfer film that effectively covers the mating surface of the sleeve assembly to form a solid oxide-type lubricant film.
• Sintered bronze powder 0.20-0.35mm, provides maximum thermal conductivity away from the sleeve surface, also serves as a reservoir for mixture.
• The steel carrier ensures high load-bearing capacity and excellent heat dissipation.
• 0.002 mm tin-copper coating provides good corrosion resistance.

Customized Bushing & Sliding Bearings

Made to order Components - manufactures and designs custom self-lubricating bearings for the most extreme high temperature, high pressure and corrosive conditions.du bushing, du bush, bronze bushing, replacements.Bronze bushings or bushes are necessary components.Bushing & Bearing Manufacturer | =Bushings (Metric) I Bush Alternative

Nominal Diameter Width Wall

Thickness Shaft

Diameter Housing

ID Installed Bushing ID Clearance

Plain Bearings & Self-lubricating Bushings Metal Polymer Bronze Plain Bearing | steel sleeve bushings by size Spare parts and Textile machinery bushings

VIIPLUS Bushing & Bearings is now mainly used in textile machinery bearings components.Composite Bushing: SF-1 PAP PAF PAS P10 P20 SF-2 POM

“Self-lubricating Bearings for Textile Machinery”: VIIPLUS your partner of sliding bearings solutions for textile machinery . VIIPLUC from china have experience in the textile machinery spare bushing parts industry.

Spare Bushings parts of Spinning Textiles Mills Spinning Unit's Machinery self-lubricating bearings Spare Parts.

Viiplus tri-layer maintanence-free bushing have a base of lower carbon steel, onto which a porous bronze layer is sintered. mixtures are impregnated into the intersice of this bronze layer after rolling process completed. VIIPLUS 10 SERIES has good physical & mechanical properties, also has certainly chemical properties. It is suitable for rotary, oscillating movement with performance of self-lub. Anti-wear, lower firction, lower noise.

Self lubricating plain bearings with sliding layer

1. Self-lubricating Layer Mixture 0.01-0.03mm. After rolling process completed, mixtures are filled in intersice of bronze layer. Under normal operation, Part of mixture on top layer will be removed and transferred on the mating surface, forms a physically lubricating film, which will reduced the firction coefficient and protect the mating shaft.
2. Porous Bronze layer; The layer provides bonded strength of Self-Lub. Layer.
3. Steel Backing The layer provides load & thermal conductivity
4. Copper / Tin layer

Steel Backed Lined Bushings

steel-backed, sintered-bronze lined bearing.

used in dry, semi lubricated environment.

It has a wide applicable temperature range from -319 degrees F to 518 degrees F. The thin walls and

Light weight construction enable a compact design of the product.

It can substitute a conventional bearing where saving space is desired.

Steel Backed Bushing provides superior shock and impact load resistance. The Steel Backed Lined bushing maintains a low coefficient of

friction and is usable without lubrication at high load, low speed operations with excellent wear resistance.

VSB-10 Metal-Polymer Anti-Friction Plain Bearings

ROLLED DRY SLIDING BEARINGS ()
Steel + Bronze Powder + /Fibre

Wrapped Lined (maintenance-free), self lubricated plain or flanged bearings, thrust washer and strip, Carbon steel shell with sintered bronze layer filled with

VSB-10 Self-Lubricating Multilayer Composite Bushing
· Bushing material suitable for lubricated applications
· self-lubricating bushings offer very good wear and low friction performance over a wide range of loads, speeds and temperatures in dry running conditions
· Anti-friction bearing suitable for linear, oscillating and rotating movements
Material is designed to operate without supplemental lubrication and will perform excellent when lubrication is present. Low friction, low wear rate, good sliding characteristics and very low absorption are a few of the features of this material. VSB-10 bushings will support rotary, linear and oscillating motion.

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

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

Plain bearings are available as bushes, collar bushes, washers, strips or special designs.
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

Lubrication Free with Excellent Wear Resistance

The Steel Backed Bronze Bushing is used in a variety of applications in a number of industries. Below are a few of the more common uses:

Hydraulic Systems: Bushing for Valves and Rotary Actuator, Bushing for Gear Pumps, Bushing for Cylinders, Bushings for Shock absorber, Bushing for Lucas Hydraulic Pump,

Food Processing: Bottling Machine, Bottle Washer, Automatic Bag Maker, Dairy Processors, Meat Choppers, Mixers

Automobiles: Suspension Bushings, Steering, Brake Bushings, Clutch, Transmission Bushings

Railroad Cars: Side Thrust absorber, Automatic Doors Bushings

Ships: Steering Linkages, Hatch Covers, Pulley Blocks Bushings

Aircraft: Control Linkage, Shock absorber bushings, Actuator Valves bushings, winches

Printing: Offset Printer, Gravure Printer, Mail Printer, Automatic Ticket Bender, Automatic Book Binder

Textile Industry: Spinning frame, Yarn Twister, Sheet Roller, Winders
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.

viiplus products are widely used in all industrial fields:Widely used in hydraulic and pneumatic industries, forging machine tool industry, plastics machinery industry, lifting and handling machinery, port machinery, office, fitness machinery, textile machinery, food packaging, filling machinery, chemical machinery, printing and packaging, paper making machinery, automobiles, railways Steam locomotives, shipbuilding industries, presses, metallurgical machinery, construction machinery, etc.

START YOUR PROJECT With an Application Engineer

Bushing, Bearing, Line Bearing, Coated Bushing, POM Bush, POM Bearing

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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