The JF800 Bimetallic Bearing Bushes, also known as SAE797-compliant bearing bushes, are specifically designed for connecting rods in automotive and industrial engines. These bearing bushes feature a unique bimetal construction, combining a steel backing with a bronze overlay, to provide superior wear resistance and durability.

The steel backing offers the necessary strength and rigidity to withstand the dynamic loads and pressures generated by the reciprocating motion of the connecting rod. The bronze overlay, on the other hand, provides excellent tribological properties, including low friction and good wear resistance, ensuring smooth and efficient operation of the engine.

One of the key features of the JF800 Bimetallic Bearing Bushes is the presence of an oil groove. This groove allows for the distribution of lubricant throughout the bearing bush, reducing friction and wear even further. The oil groove also helps to dissipate heat generated during operation, preventing thermal damage to the bearing bush.

The combination of the steel-bronze bimetal construction and the oil groove makes the JF800 Bimetallic Bearing Bushes an excellent choice for demanding engine applications. They are widely used in automotive engines, as well as in industrial engines such as diesel engines, gas engines, and compressors.

The precision manufacturing process ensures that the JF800 Bimetallic Bearing Bushes fit precisely into the connecting rod and crankshaft journals. This precise fit reduces friction and wear, improving engine efficiency and durability.

Overall, the JF800 Bimetallic Bearing Bushes with Oil Groove are reliable and robust components that offer superior wear resistance and durability in a variety of engine applications. Their bimetal construction and oil groove design ensure smooth and efficient operation of the engine, while also extending its service life.

China Factory, OEM, Customized Shifting Fork Bushings, Bimetal Bushing Bearing Auto Bushes, High Quality

Factory price bimetal bushing with oil grooves Customized lubrication Copper-based Alloys Steel backed bronze sintered Bi Metal bushings SAE 797/SAE 799/SAE 783 /SAE 48 Bi Metal Sintered Bushings

Standard Groove Bronze Steel Bushings Circular, Straight,Single Loop,Double Loop,Straight & Circular Figure Eight Double Figure Eight

Metallic Self-lubricating Maintenance-free Bearings

Bi-metal Bushings is a thin-walled self-lubricating composite sliding material.

It consists of a backing made of standard steel, stainless steel or bronze with a steel bronze layer applied in a combined rolling/sintering process.It is better to pay attention to the VIIPLUS Self-Lubricating Bearings solution.

Bimetal Bearing & bushings

VIIPLUS offers basically the same bearing characteristics as self lubricating bearings.metal but is capable of handling even higher loads and offers an economic solution to many bearing problems.

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Typical application

Bimetal Bushing application for Water turbines, Injection molding machinery, food & beverage, tire molds, rotor lock in wind turbines, marine & offshore, heavy duty, iron & steel works, steam turbines, gas turbines, compressors

Characteristic

This bearing is the kind of Flange bush with the steel backing sintered with bronze powder through the friction welding. The surface may be incorporated with various kinds of oil grooves, pockets to meet different necessities of various lubricating
conditions.

This product is widely applied in various automobile engines, vehicle hassis, motorcycle clutches, rubbing plate of gear pumps and other hoist machines．

Bimetal Bearing & Bushing Manufacturing

Features and benefits include:

allows maintanance-free operation
posses high static and dynamic load capacity
is stick-slip-free with low coefficient of friction
offers a high margin of safety against mating material damage
is utilisable at temperatures ranging from 190°C (-310°F) up to 280°C (536°F)
is utilisable at corrosive environments
works well even under dirty environment (dust, abrasive particles, etc.)

Technical Data

Standard Tolerance Dimension Table

Materials

• Support materialSteel copper-plated / tin-plated

• Sliding layerCuPb10Sn10

Tolerance Details

• Housing ØH7

• Bushing inner-Ø after mountingH9

• Shaft tolerancef7 to h8

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!

CAPTION

Special dimensions are available on request.Get in touch-Industrial Catalogue Oil & Gas bushes Catalogue!
Send us an online enquiry You can use our “Enquiry Form” to get in touch with us. One of our sales team will contact you immediately.

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.