Wrapped composite bimetal bearings, featuring a copper or tin plated steel backing and a bronze lining of CuPb10Sn10 or CuSn6Zn6P, offer exceptional performance and durability in a wide range of industrial applications.

The steel backing provides strength and dimensional stability, while the plating of copper or tin enhances corrosion resistance and adhesion between the backing and the bronze lining. The bronze lining itself, wh CuPb10Sn10 or CuSn6Zn6P, offers superior wear resistance, high load-bearing capacity, and excellent sliding properties.

CuPb10Sn10 bronze is a lead-tin alloy with good machinability, high ductility, and excellent sliding properties. It is widely used in applications that require a high degree of wear resistance and load-bearing capacity.

CuSn6Zn6P bronze, on the other hand, is a phosphorous-containing tin alloy that offers exceptional strength, hardness, and wear resistance. It is suitable for applications that require both high load-bearing capacity and good corrosion resistance.

The wrapped composite construction of these bimetal bearings allows for easy installation and replacement, while also providing a secure and reliable bond between the steel backing and the bronze lining. This combination of materials and construction techniques results in bearings that are suitable for a wide range of industrial applications, including heavy machinery, automotive components, and other demanding environments.

Oilless Bushes

Made to order from china Wrapped composite sliding bearing Copper or tin plated steel bronze DIN 1494 / ISO 3547 Bimetal CuPb10Sn10 or CuSn6Zn6Pb3 MATERIAL Special dimensions With lubrication pockets and oil holesare available on request.

Materials :Steel copper-plated or tin-plated Sliding layerCuPb10Sn10

Bimetal Bushing is a low-maintenance bushing material. An initial greasing during installation is necessary, after that periodic greasing with oil or grease is mandatory.

Bimetal Bushings Tolerance Details

• Housing ØH7

• Bushing inner-Ø after mountingH9

• Shaft tolerancef7 to h8

Application features:

Jf-800 bimetal bearing is a kind of steel-copper alloy product made of CuPb10Sn10 or CuSn6Zn6Pb3 material sintered on the surface of low carbon steel plate.This product is the strongest bearing capacity of double alloy bearing, the balance bridge bushing of heavy duty vehicles, all use this product.It is a very versatile bearing with high load and low speed.

Installation sliding bearing, Bronze Gleitlager - with lubrication pockets Customized high quality oilless JF800 Bimetal Metal Bushing

Bimetal Bushings Range Of Application

Track rollers, construction machines, crane construction, agricultural machines (impact loading)

• Fork lifts
• Pallet Trucks
• Cranes
• Excavators

Mounting Bimetal Bushings

Housing: Mounting bevel min. 1.5 mm x 15-45° Shaft: Mounting bevel 5 mm x 15°, edges rounded The application of an adequate force fitting mandrel is advisable. Grease lubrication of the outer surface may be necessary when mounting.Gluing: Adhesive should not contact the sliding surface!

Installation bronze gleitlager sliding bearing
Sliding bearings are installed by being pressed into a machined housing “H7“.

Please note the following:

• Create an insertion bevel at an angle, and clean and deburr the parts to
be assembled
• Lubricate the outer surface of the sliding bearing prior to installation
• Check the axiality between the installation space and the centring axis
of the sliding bearing
• If two sliding bearings are required, these must be aligned
• Use a counter mandrel with suitable dimensions

On its surface. To effectively decrease abrasion, its alloy surface can be machined with ball shaped oil sockets for easier oil storage. When necessary, it could be plated copper or tin on the steel back. It can be applied to conditions of mediate load with mediate or high running belocity and conditions with enormous impact load. In mechanical applications,VIIPLUS BIMETAL BRONZE GLEITLAGER is used to make wrapped bushes, thrust washer and bushes on connecting rod level of gas engine.

Technische Daten

• Wrapped composite sliding bearing

• Copper-plated or tin-plated steel / bronze

• Low-maintenance

• With lubrication pockets

Properties

• For high load capacity and oscillating movement, as well as for rough operation and temperature load. Long-run lubrication because of lubricant storage.

Materials

• Support materialSteel copper-plated / tin-plated

• Sliding layerCuPb10Sn10

Material Properties

• Specific load capacity static≤ 250 [N/mm2]

• Specific load capacity dynamic≤ 140 [N/mm2]

• Sliding speed≤ 2,5. [m/s] ≤ 5 [m/s] oil lubricated

• Reibungswert **0.04 [µ] to 0.12 [µ] depending on lubrication

• Temperature strain– 40 [°C] to + 250 [°C]

• Max. PV-value2.8 [N/mm² x m/s]

• Percentage contact area > 75 [%]

Maintenance

• is a low-maintenance composite sliding bearing, but primary lubrication is necessary. Oil or grease lubrication is possible. Due to solid lubricant storages, lubrication clearances are reduced to a minimum!​

Bimetal Bushing Size & dimensions

Caption:Special dimensions are available on request.

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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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