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What Is Sinter Bronze Bush Technology?

sinter technology is a technique for processing parts by hardening metal powder and baking it at a temperature lower than the melting temperature of the metal to “form the part”, a process called powder metallurgy. Sintered parts are called “sintered metals” or “sintered products”.


Wholesale Sinter Bronze Bush Slide Bearing

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Reduce production costs and achieve more advanced designs with metal powder sintering. Improve the quality of your sintered bronze bush with metal powders. View Products.

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high-performance sinter bronze bushings

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Sinter Bronze Bush – China Supplier

VIIPLUS can offer shaped sinter bronze bush in a variety of iron or bronze materials. It’s the ability to produce complex shaped parts to close tolerances in volume at a much lower cost.

Sintered bronze bushings are rigid, temperature resistant, and have high-strength parts formed through the process of sintering or powder metallurgy. Applications for shock absorbers, home appliances, automobiles, and as well as most commonly as bearings or bushings, sintered bronze parts can be produced in large quantities with consistent properties and sizes.

Sintered bronze bush mainly consists of the following steps.

  • Preparation of powder,
  • Formin
  • Sintering
  • Post-treatment
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Preferred Sinter Bronze Bush Material

Bronze is an ideal material choice for the process of sintering as it is a non-ferrous metal that is commonly used as a conductive material and its porosity allows lubricants or air and liquids to pass through it. Through an effective sintering process, the properties of material strength, translucency, and thermal conductivity are enhanced and because it is a simple process, most of the other physical properties of the metal are retained.

Sae841 Sintered Bronze Bush With Oil-Impregnated

One of the finest powder metal bearings on the market. Using a proprietary blending and sintering process this gives us a uniform grain structure and spheroidized porosity which results in superior strength, lower coefficient of friction, and a uniform oil coating of the mating shaft. During operation, oil-impregnated bronzes have a proven record of excellent wear resistance and long life where normal lubrication is difficult or impossible to provide.

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flange sinter bronze bushing, sinter bronze bush
sinter bronze bushing, sinter bronze bush

Oil Impregnated Sinter Bronze Bushing | Advantage

The bush in Sinter Bronze bush gives a wide range of applications, and is realized with a powder of bronze sintered, calibrated, and impregnated into specific oil (volume of impregnation of 25% ÷ 29% as per DIN 30910 Sint A50). During the application, this kind of material, thanks to the oil impregnation, develops a film of lubricant oil, between the shaft and the bush.

Sintered Bronze Bush – Reduce Your Costs

Sinter bronze bushing has good cold and hot processing performance, using a variety of molding processes, powder raw materials can be directly molded, with less residue, no residue of rough or net molding parts, and mechanical processing is greatly reduced. The utilization rate of the material is improved and the cost is reduced.

How Do Sinter Bronze Bushing Work?

Sinter bronze bushings are named after the method by which they are manufactured – so-called “sintering”. In this process, the embryo, which is pressurized and shaped from powder, is heated to a suitable temperature below the melting point, so that adjacent powders diffuse into each other to produce a solid bond. Depending on the process and the material, this results in a rather coarse porous part. This pore structure is the secret to the success of sinter bronze bushing.

Sinter bronze bush is a mass production process that can reduce costs to a surprisingly low level compared to CNC machining. An added benefit of sinter bronze bushings is the unique pores that form in the metal structure. These pores act as a reservoir for lubricant, providing a channel to the bearing surface. This unique feature adds the benefit of self-lubrication to many powdered metal bearings.

bronze wear pads

Different Types Of Sinter Bronze Bush

Rigid, temperature resistant, and high-strength parts formed through the process of sintering, or powder metallurgy, sintered bronze parts are available in several different types. SAE 841 Sintered Bronze parts are available in flange bushing, thrust washer, wear plate, and more.

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sinter bronze bush

Applications Of Oil-impregnated Sintered Bronze

Sintered bronze bearings are most suitable for rotary applications requiring a self-lubricating operation. Oil-impregnated sinter bronze bush has been used in various applications for many years. including Packaging machines, Automotive, Power tools, Domestic appliances, and Starter motors.

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oilless bronze bearings application

The manufacturing process of  sinter Bronze bushings

1. Raw materials.
Make the raw materials into powder
2. Mixing.
Mix the required powder in a certain proportion and homogenize it to make a blank powder.

casting bronze bushings

3. Compression molding.

The mixed material will be uniformly mixed and loaded into the compression mold to make the billet with a certain shape, size, and density. It is compressed from a vertical direction with high pressure to increase density and strength. Sintering is commonly used with complex shapes but is also limited by the structure of the mold.
4. Sintering.

Compressed parts are in a “fragile” state. Like a cookie, it can be easily cracked by hand. Sintered products have strong mechanical properties through heat. Sintering means “baking and bonding”, baking in a sintering furnace at a temperature below the melting temperature of the metal (800 to 1300°C). The sintering furnace is filled with a protective gas to prevent oxidation of the molded product. The powder particles in the sintered molded product become stronger by fusion bonding.

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5. Dimensioning.

The dimensional accuracy of the sintered product is improved by applying pressure to the sintered product again in the mold.

6. Post-treatment.

To further improve the accuracy and strength, machining and heat treatment are performed if necessary. In addition, because sintering is manufactured using high-precision molds, there is high dimensional accuracy and less post-molding processing. Since sintering allows mass production of high-precision parts, it is used to manufacture various mechanical components (bearings, gears) and other various mechanical components, including automotive parts. The mechanical strength is inferior compared to that fine casting molding.

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