High-Load Half-Bearing Shell Steel & POM Composite Bushings are mechanical components designed to provide smooth and wear-resistant movement under heavy loads. These bushings are typically made of a steel shell that encapsulates a composite material consisting of Polytetrafluoroethylene () and Polyoxymethylene (POM).
, known for its excellent lubrication properties and low friction coefficient, provides a smooth sliding surface for the bushing. POM, on the other hand, offers good mechanical strength and rigidity, making the composite material suitable for high-load applications.
The steel shell of these bushings adds structural support and durability, enabling them to withstand heavy loads and frequent movement. The combination of and POM within the composite material ensures that the bushings maintain their lubricity and wear resistance over extended periods of use.
High-Load Half-Bearing Shell Steel & POM Composite Bushings are commonly used in various industrial applications, including automotive, aerospace, and heavy machinery, where smooth and reliable movement under high loads is crucial.

Steel-Backed - Lined Bearings Custom Designed and Manufactured Bearings and Bushings

High-load half barings /POM self-lubricating standard size qoute
Bearing shell made to order from china,which is the part in contact between sliding bearing and shaft journal, is a shingle-shaped semi-cylinder, which is very smooth. It is generally made of bronze, friction reducing alloy, low carbon steel, /POM and other wear-resistant materials.Half bearings which present excellent seizure resistance with the best load resistance.Steel/ composite bearing, in 1/4,1/3,1/2,or other sizes.
Bearing bush has integral and split type two, the integral bearing bush is usually called Bushing.Integral bearing bush without oil groove and there are two kinds of oil groove.The bearing bush and the shaft neck adopt clearance fit, generally do not rotate with the shaft.
Bearing, Half Bearing, Plate, Washer made to order from china.Half bearings which present excellent seizure resistance with the best load resistance.
A mixture of and special fillers achieves both and abrasion-resistance and low-friction coefficient.
Lead-free oilless resin bearings.
Providing customers of Composite bearing with the capability to reduce the risk of unplanned downtime, extend asset life, improve performance levels and cut down on overall maintenance costs.This is structured with a triple layered material, which contains sintered bronze powder and special fillers with on a steel back plate.This is a boundary lubricating bearing that performs the best against abrasion.It employs toughening agent, lead, and tin alloy with on surface layer for better durability.
Introduction

Movement characteristics

When the sliding bearing is working, a thin oil film between the bush and the shaft is required for lubrication.If the lubrication is not good, there will be direct friction between the bush and the shaft, friction will produce very high temperature, although the bush is made of special high-temperature alloy material, but the high temperature caused by direct friction is still enough to burn it out.The bearing shell may also be burned due to excessive load, high temperature, impurities in the lubricating oil or abnormal viscosity and other factors.The sliding bearings were damaged when the tiles were burned.

Half barings Manufacture

Thick-walled bushes can be cast to improve the friction performance by pouring a layer of bearing alloy (called bearing lining) on the inner surface of the bush.In order to make bearing alloy and bearing bush stick well, various forms of mortise, groove or thread are usually made on the inner surface of bearing bush.Thin - wall bearing bush can be produced in large quantity by continuous rolling of bimetallic plate.
Powder metallurgy involves mixing basic materials, such as powdered iron or copper, with graphite and then pressing and sintering.Its pores can store lubricating oil, called oily bearing.
Bearing bush material is usually soft, the inner cylinder is not suitable for grinding, can be boring, diamond boring, scraping or grinding process.Grinding should not use the method of matching with the shaft diameter, but should use a special lapping rod of the same size as the shaft bush hole.Scraping is mostly used for some tile bearings, scraping with wide blade scraper machine.When scraping by hand, the scratch should be shallow.Bearing bush with complicated inner surface should be boring in a special way according to the specific shape.

Half Sliding Bush Material Editing

Bearing shell material is characterized by low friction coefficient, sufficient fatigue strength, good running-in and good corrosion resistance.Common bearing bush materials include self-lubricating bearing materials (), copper alloy, wear-resistant composite bearing materials, etc.
Non-lubricated bearing bush materials mainly include polymer, carbon graphite and special ceramics.
Polymer Sliding Bush
Polymer also known as organic polymer materials, engineering plastics.Common materials are phenolic resin, nylon, and so on.Non-lubricated bearings made of plastics (such as ) are resistant to strong acids and weak alkalis, with good insert, abrasion reduction and abrasion resistance.The sheet is pressed into lip sealing ring, bearing bush, piston ring and gasket, which are used in belt conveyor, typewriter, sewing machine, electric phonograph disc, water pump, textile machinery and agricultural machinery.
Polymer has the characteristics of light weight, insulation, friction reduction, wear resistance, self-lubrication, corrosion resistance, simple molding process, high production efficiency.Compared with metal materials, their tribological properties are sensitive to ambient temperature and humidity, and have significant viscoelastic properties, so the gap between bearing bush and journal is large.Because of its low mechanical strength, small elastic modulus, poor absorption of lubricating oil, and limit the working speed and pressure value of bearing bush.
Related Products Graphite Bronze Bushing
The sliding bearing thurst washer & plate - graphite material can be used in harsh environment.The more graphite, the softer the material, the smaller the friction coefficient.

Metal Bearing

Metal bearing is an important part to support a connecting rod and a crankshaft to rotate in an engine for automobiles, motorcycles, construction machinery or ships.
Half bearing is divided into two parts to cope with the complex shape of the installation point.

Metal Bearings Lead Bronze

Good in abrasion resistance, load resistance, impact resistance, and heat resistance. It can be used for places where the speed and the load would be a problem.
We are available to have through meetings with you to offer services and advice on what is the best for your purposes at the most affordable prices.

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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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