Engine connecting rod bushes made from high tin aluminum alloys offer superior performance and durability in demanding automotive applications. These bushes, also known as big-end bearings or crankpin bearings, play a crucial role in the efficient and reliable operation of internal combustion engines.

High tin aluminum alloys, typically containing a significant percentage of tin (Sn) along with aluminum (Al) and other alloying elements, are chosen for their excellent wear resistance, fatigue strength, and thermal conductivity. These properties ensure that the connecting rod bushes can withstand the high temperatures, pressures, and dynamic loads generated by the reciprocating motion of the piston and connecting rod.

In addition to their material properties, the precision manufacturing process ensures that the connecting rod bushes fit precisely into the connecting rod and crankshaft journals. This precise fit reduces friction and wear, improving engine efficiency and durability.

The use of high tin aluminum alloys in engine connecting rod bushes has become increasingly common in modern automotive engines, particularly in high-performance and racing applications. These bushes are able to meet the demanding requirements of these engines, providing superior reliability and durability under extreme operating conditions.

Overall, engine connecting rod bushes made from high tin aluminum alloys are an essential component for ensuring the smooth and efficient operation of internal combustion engines. They provide superior wear resistance, fatigue strength, and thermal conductivity, making them a reliable choice for a wide range of automotive applications.

Engine Connecting Rod Bush High Tin Aluminum

The development trend of sliding bearing materials was pointed out, which was to develop the unleaded bearing materials and speed up research and development in new materials and technologies.

Internal combustion engine connecting rod bush bushing, bimetallic tin aluminum alloy bearing, JF-20 high tin aluminum axle bush bearing

The inner diameter
39 (mm)
Outer diameter
44 (mm)
The thickness of the
46 (mm)

Product Introduction

Aluminum bushing, steel bronze bimetal bushes, composite bush has a combination of high strength, load-bearing capacity, and the advantages of good wear resistance. Particularly suited to medium-speed and low-speed high-contained set and so on.

High tin aluminum bearing, is based on steel matrix, the surface of roller AISn20Cu material products. This product has secondary fatigue strength and bearing capacity, good corrosion resistance, good sliding properties, etc. This product is used for medium and small power of internal combustion engine bearing shell machine collar axis, the train engine bearings, air, is replacing novel products.

Technical Data

Thickness Tolerance Between Inner Hole Machining And Non-machining

Application Field

Engineering machinery: end of popular institutions supporting wheel shaft sleeve, towing axle sleeve, tensioning shaft sleeve; Auto industry: the balance shaft lining, steel pin bushing, steering knuckle main shaft sleeve shaw, connecting rod bushings, valve rocker arm shaft sleeve, CAM shaft collar, differential bushings, transmission shaft sleeve, the internal combustion engine spindle watts, thrust washers, And plunger pump side piece, such as a piece of gear pump side.

Oil Holes Form

Buckles Form

Bimetal bushings Standard dimensions Chart

This is a made-to-order product that we do not keep inventory for. Additional construction work for oil grooves and lubrication channels may be required depending on the actual conditions of use.

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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