White metal bearings and bimetallic bushings, with a steel backing and AlSn20Cu material, offer exceptional performance in a wide range of industrial applications. The combination of steel and AlSn20Cu alloy provides a strong and durable foundation for the bearing or bushing, while the white metal material offers excellent wear resistance and self-lubricating properties.

The steel backing provides the necessary structural support and stability for the bearing or bushing, ensuring it can withstand the rigors of heavy loads and high-speed operation. The AlSn20Cu alloy, on the other hand, is a highly wear-resistant material that is capable of maintaining its performance under extreme conditions.

The white metal material itself is a type of bearing alloy that is known for its self-lubricating properties. This means that it does not require additional lubricants to function effectively, further reducing maintenance requirements and extending the life of the bearing or bushing.

Bimetallic bushings, in particular, are designed with a steel backing and an overlay of AlSn20Cu alloy. This combination allows for precise machining and fitting, ensuring a tight and reliable fit between the bushing and its mating surface. The overlay of AlSn20Cu alloy also provides the necessary wear resistance and lubricity to handle demanding applications.

In summary, white metal bearings and bimetallic bushings with steel backing and AlSn20Cu material offer a reliable and long-lasting solution for industrial applications requiring high performance and durability. Their unique combination of materials ensures superior wear resistance, self-lubricating properties, and structural stability.

Self-Lubricating Bronze Bushing

Replace (alloy) bushings & plain bearing products.White Metal Bearing & Bimetallic Bushings Material & Strips Steel with AlSn20Cu made to order from china.Support material Steel, tin-plated,Sliding layer Aluminium.For area of use Camshaft bushes.Huge Bushings Type & Size Selections & Savings.

metal or bearing metal, is any of several alloys used for the bearing surface in a plain bearing.

Mounting advise

Housing: Mounting bevel min. 1.5 mm x 15-45°

Shaft: Mounting bevel 5 mm x 15°, edges rounded.
The application of an fitting mandrel is advisable. Grease lubrication of the outer surface may be necessary when mounting.

Bearing & Bushes

Bimetal bearing & bushes made up of white metals are manufactured keeping in mind the desired properties like wall thickness, interference fit, locating tangs, free spread, grooving configuration and clearance.

bimetallic strip a strip made of two or more layers of metal with different expansion coefficients that can be combined and processed.

In general, hot rolling, cold rolling and hot pressing are used to compound, and the alloy with low melting point can be cast to the solid metal layer with high melting point for compound.The composite method depends on the properties of the component metal and the application conditions of the bimetal.

Materials

• Support materialSteel, tin-plated
• Sliding layerAlSn20Cu

Technical

Specific load capacity staticto ≤ 100 [N/mm2]

Specific load capacity dynamicto ≤ 70 [N/mm2]

Sliding speed≤ 25 [m/s]

Friction value0.08 [µ] to 0.17 [µ] depending on lubrication

Temperature strain-10 [°C] to +200 [°C]

Max. PV-value6.0 [N/mm² x m/s]TOLERANCE DETAILS

Housing ØH7

Bushing inner-Ø after mountingH9

Shaft tolerancef7 or h8

Properties

For high rotational speeds in a sealed and oil-lubricated application.

Range Of Application

High sliding speed, engine construction

Manufacturing technology of aluminum tin bearing alloy bimetallic strips Thin wall bearing (hereinafter referred to as the bearing shell) is one of the main vulnerable components of internal combustion engine, its variety and large output, as the internal combustion engine technical indicators (such as speed, power, etc.), the increase of demand bearing has a high bearing capacity, white metal (tin base alloy or lead white white metal) bush bearing capacity can not meet the requirements, prompted bimetal strip copper base alloy (continuous casting or sintering) successful development and application of manufacturing technology.But this kind of alloy shell, because of its surface properties (such as compliance, embedded hidden sex, etc.), therefore, the need to set up a thickness of about 0.02 ~ 0.05 mm pewter binary alloy or ternary alloy surface coating, to improve the performance of bearing surface to meet the requirements of bearing working reliability, obviously, this will increase the manufacture cost of bearing, and leads to some problems such as environmental protection, thus, force bearing shell companies and scholars to research and development at home and abroad with medium AlSn20Cu surface of bearing capacity and the good performance of bearing alloy (Sn 17.5 ~ 22%,Cu is 0.7 ~ 1.3%, the rest is Al) and its bimetallic belt manufacturing technology.

Mounting Advise

• Housing: Mounting bevel min. 1.5 mm x 15-45°
• Shaft: Mounting bevel 5 mm x 15°, edges rounded
• The application of an fitting mandrel is advisable. Grease lubrication of the outer surface may be necessary when mounting.

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.