When referring to a bushing with dimensions of 25x28x25mm, it typically means a self-lubricating plain bearing bush with an outer diameter of 28mm, an inner diameter of 25mm, and a length or thickness of 25mm. bushings, also known as oil-impregnated sintered bronze bushings, are commonly used in applications where lubrication is difficult or undesirable.

These bushings contain a porous bronze material that is impregnated with a lubricating oil, which is gradually released during operation to provide long-term lubrication and reduced wear. They are suitable for high-speed, low-load applications and can be used in a wide range of temperatures and environments.

If you are looking for an equivalent or replacement for a bushing with these dimensions, it is important to ensure that the material, lubrication properties, and dimensions match your specific requirements. You may need to consult with a bearing supplier or manufacturer to find a suitable equivalent or replacement product.

The Premier Manufacturer for Bronze Bushings Online, bearings | lined wrapped bearings, Bushing Equivalent | ID25*OD28*H25mm

Oil-free lubricated bearings are rolled plain bearings with steel back as a matrix, spherical bronze powder sintered in the middle, a mixture of and lead on the surface. It has the characteristics of low friction coefficient, good wear resistance, corrosion resistance and oil-free lubrication. Using this product can reduce the cost, reduce the mechanical volume, avoid the phenomenon of shaft bite and reduce the mechanical noise, etc. The products have been widely used in the sliding parts of various machinery, such as printing machines, elevators, textile machines, tobacco machines, fitness machines, hydraulic trucks, micromotors, solenoid valves, automobiles, motorcycles and agricultural and forestry machinery.

Wrapped standard bearings Medical Electric Bed Massage Armchair

FURNITURE AND INTERIORS BUSHING & BEARINGS

Lubrication Free with Excellent Wear Resistance

Printers, Copiers & Shredders Bushings & Sliding Bearings.

Office equipment
This company produces the self-lubricating bearing has simple structure, light weight, completely without refueling, and low noise and long life and other characteristics of this kind of bearing can be heavily used in office automation equipment, typical use: fax machines, photocopiers, shredders, scanners, printers, and so on various joints and reciprocating motion component.

Products

Plain Bearings Bimetal Bearings Wrapped Bronze Bearings Solid Bronze Bushings Wear Plates Thrust Washers

Welcome to VIIPLUS International. We are one of the china leading exporter, manufacturers and distributors of plain bearings and sintered bushings parts. We are the sole bearings supplier of the original and genuine self-lubricating bearings in the china.

Because of its small size, they play a low-noise and self-lubricating properties, a general sliding bearings and rolling bearing irreplaceable position.

The design and durability of VIIPLUS bearings is suited for use in applications associated with the fitness equipment, home appliance and wellness industries. Increased life, reduced noise, lower weight and dependability makes VIIPLUS the obvious choice for efficient and effective bearing life.

We are an authorized Copystar dealer , providing network-ready digital copiers/printers, laser printers, color copiers/printers, digital laser facsimiles, multifunctional and wide format self-lubricating bearings solutions.

Oil-free lubricated bearing (standard size & Inch size type bushings) materials can meet long-term use under dry friction and lubrication conditions without requiring more maintenance;

Typical Applications

Office and business machines: copier, fax machine, printer, mail processor, etc.

• Copier lined wrapped bearings
• Printer Bronze Bearings
• Shredder Wrapped Acetal Lined Bearings
• Massage Armchair Steel Bronze Bushings
• Medical Electric Bed Wrapped standard bearings
• Air Compressor Wrapped standard bushings
• Food Processor Bronze Lined Bearings
• Electric Tools self-lubricating bearings
• Office chair pivot point for the self-lubricating plastic plain bearings.

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 Oilless bush bushing

BEARING

BUSHING

CHARACTERISTICS

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.

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.

Carbon Steel + Copper Powder + ( + Pb + Filler)

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

Depending on operating conditions

steel-backed, sintered-bronze lined bearing.used in dry, semi lubricated environment.

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
Outer Packaging: Hard carton; Wooden case ; Wood pallet.

START YOUR
PROJECTWith 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.

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.

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.