Cylindrical Bimetal Bushings in 800 metric size are composite bearings that feature a unique combination of two different metals. These bushings are designed to provide superior wear resistance, corrosion resistance, and mechanical strength, making them ideal for a wide range of industrial applications.

The 800 metric size cylindrical bimetal bushings consist of a steel or similar strong base material, which is bonded to a softer, more wear-resistant outer layer. This outer layer, often made of a bronze, brass, or copper-based alloy, ensures smooth and reliable operation while handling heavy loads and resisting impact and vibration.

These bushings are extensively used in industries such as construction, agriculture, and manufacturing, where they are exposed to extreme temperatures, pressures, and harsh environmental conditions. The bimetallic construction of these bushings ensures they can withstand such harsh environments and provide consistent performance over long periods.

Additionally, the soft outer layer of the bushings can be impregnated with oil or grease to create a self-lubricating surface. This reduces friction and wear, further extending the service life of the bushings and reducing maintenance requirements.

As a reliable supplier of Cylindrical Bimetal Bushings in 800 metric size, we offer a wide range of options to meet your specific application needs. Our team of experts is available to provide technical advice and customized solutions to ensure you get the best bushings for your requirements.

Contact us today to learn more about Cylindrical Bimetal Bushings in 800 metric size and how they can enhance the performance and reliability of your equipment.

JF bimetal composite bearings use high-quality low-carbon steel as the matrix, and the surface is sintered with low-friction copper alloys (CuPb10Sn10, CuPb6Sn6Zn3, CuPb24Sn4, CuPb30, AlSn20Cu, CuSn8Ni) as the wear-resistant layer of the bearing.

The copper alloy surface can be used according to the working conditions Various types of oil grooves, oil holes, oil pockets, etc. need to be processed to suit the occasions where it is not possible to continue to refuel or it is difficult to refuel. The material can get good joint strength and best bearing capacity through secondary sintering and secondary extrusion.

Download steel bushing sleeve catalogue BIMETAL BEARINGS CUPB30 CATALOG.pdf

Bimetal self-lubricating bearings, bearing bushes and thrust washers are made of high-quality low-carbon steel and sintered bronze powder. The surface is suitable for rotating and swinging movements under high load and low speed. It has the characteristics of low friction coefficient, good wear resistance, long service life and good anti-seizure performance.

Bimetallic Steel Bushing Sleeve Material: CuSn10Pb10

1. The copper/aluminum-lead alloy sintered layer, as the working layer of the bearing, provides good lubrication performance, and has good fatigue resistance and seizure resistance.

2. Low carbon steel base plate provides bearing capacity and heat transfer function.

Bimetal Bearing-800 Chemical composition

Bimetal Bearing-800 Technical Data

Bimetal Bushing-800 Inner hole machining and non-machinable thickness tolerance

Select your Oil pocket form

Select your Buckle form

Bimetal Bushing-800 Application

Construction machinery: chassis running mechanism roller bushings, towing wheel bushings, tensioner bushings;

Automobile industry: balance shaft bushings, steel pin bushings, steering knuckle main axle bushings, connecting rod bushings, valve rocker arm bushings , Camshaft bushings, differential bushings, gearbox bushings, internal combustion engine main bushes, thrust washers;

as well as plunger pump side plates, gear pump side plates, etc.

Choose your bimetal bearings material - related bushings

Bimetal bearings are suitable for rotating and rocking motion conditions under high load, medium and high speed. In actual application, different alloy layers can be sintered on the surface according to different working conditions. The JF-800, JF-720, JF-700, JF-20, FB08G series of products are derived from this. The material structure, application field and technical parameters are summarized as follows:

Relevant data	Data	BimetallicBearing -800	BimetallicBearing -720	BimetallicBearing -700	BimetallicBearing -20
	Material	Carbon steel /Steel＋CuPb10Sn10	Carbon steel /Steel＋CuPb24Sn4	Carbon steel /Steel＋CuPb24Sn	Carbon steel /Steel＋AlSn20Cu
In addition to the standard products shown in the catalog, non-standard products can also be provided or ordered according to customer requirements.
Application		The bimetal bearing-800 product is suitable for automobile engines, construction machinery, agricultural machinery, etc.	The bimetal bushings-720 product is suitable for high-speed, heavy-duty internal combustion engine main shafts and transmission gears.	The bimetal bushings-700 product is suitable for high-speed, heavy-duty internal combustion engine main shaft and connecting rod bearings.	The bimetal bushings-20 product is suitable for the main shaft and connecting rod bearings of internal combustion engines, air compressors and refrigerators.
Maximum dynamic load P N/mm2		140	120	120	90
Max. line speed V m/s	Grease	2.5	2.5	2.5	——
Max.PV value N/mm2·m/s		2.8	2.8	2.8	——
Coefficient of friction u		0.05~0.15	0.05~0.15	0.05~0.15	——
Max. line speed V m/s	Fliud	5	10	10	15
Max.PV value N/mm2·m/s		10	10	10	8
CoefficiCoefficient of friction u		0.04~0.12	0.04~0.12	0.04~0.12	0.04~0.12
Maximum temperature ℃	Grease lubrication	150	150	150	150
	Fluid lubrication	250	250	250	250
Matching shaft diameter	Hardness HRC	≥53	≥48	≥45	≥270
	Roughness	0.32~0.63	0.16~0.63	0.16~0.63	0.16~0.63
Alloy layer hardness HB		60~90	45~70	40~60	30~40
Thermal Conductivity W/mk		47	60	60	47
Coefficient of linear expansion (axial)		18×10-6/K	18×10-6/K	19×10-6/K	18×10-6/K

Standard Tolerance Dimension Table

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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