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Oilless Bearing Manufacturers & Suppliers

VIIPLUS is an Oilless Bearing Manufacturers & Suppliers according to the client’s drawing. We have manufactured bronze bushings, wear plates, thrust washers, and other bronze parts according to drawings, offering our services to clients worldwide.

  • High hardness, wear-resistance, and fully comply with EU ROHS standards. Can provide spectrometer composition test, strength test.

     

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  • High hardness, wear-resistance, and fully comply with EU ROHS standards. Can provide spectrometer composition test, strength test.

     

    Read More
  • High hardness, wear-resistance, and fully comply with EU ROHS standards. Can provide spectrometer composition test, strength test.

     

    Read More
  • High hardness, wear-resistance, and fully comply with EU ROHS standards. Can provide spectrometer composition test, strength test.

     

    Read More
  • High hardness, wear-resistance, and fully comply with EU ROHS standards. Can provide spectrometer composition test, strength test.

     

    Read More
  • High hardness, wear-resistance, and fully comply with EU ROHS standards. Can provide spectrometer composition test, strength test.

     

    Read More
Graphite Impregnated Bronze Bushings

What Is Oilless Bearing?

Oilless Bearings are plain bearings requiring NO Lubrication or greatly reducing the frequency and amount of lubrication. It can withstand both high & low temperatures, corrosive environment, foreign particles, and impact load.

Oil-free bearings use solid lubricants to isolate the friction surfaces in contact with each other to reduce surface friction and wear. Unlike the oil used in oil film bearings, there is no flow of lubricating oil or grease, and its lubrication is achieved by solid lubricating materials. Solid lubricants behave like fluids when subjected to friction. The difference is that holes or grooves with a certain area ratio are pre-designed and processed on the working surface of the bearing, and simple and compound solid lubricants are embedded in them to make bearings, bearing bushes or linings.

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Why  Use Oil-free Bushings?

Oilless Bearings feature Self Lubricating functions and demonstrate high performance, which normal plain bearings cannot provide, for fluid lubrication, boundary lubrication, and dry friction fields.

Metallurgical equipment has been exposed to harsh environments with high temperature, heavy load, impact, dust, iron powder, and moisture for a long time, and lubricating oil and grease often fail. oilless bearings work particularly well. Because no oil is needed, a series of auxiliary equipment of the oil pump and oil tank are omitted, and the investment is reduced.

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graphite plugged bronze bushings

Manufacturing methods

There are two manufacturing methods for graphite inlay bearings. One is the casting method, the graphite slider with good geometric size is distributed in the casting mold according to the design, then cast with molten metal liquid, and then machined to the required size. The second is in the metal substrate, according to a certain arrangement, first processing some holes, and then will be graphite, MoS2 and binder according to a certain ratio of uniform mixture made of lubricant, curing in the hole, after processing to achieve the required size, inlay graphite bearing compressive strength, thermal expansion coefficient, generally depends on the metal material.

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oil-free graphite bushings
phosphorous bronze bushing

Types of Oilless Bearings

Oilless bearings are mainly divided into six categories, namely oil groove copper sleeve, solid inlaid bearing, bronze inlaid bearing, steel copper inlaid bearing, cast iron inlaid bearing, and Steel base inlaid bearings.

Oilless bearing material classification

VIIPLUS oilless bearings mainly use materials: high-strength brass (CuZn24A16), tin phosphor bronze (CuSn8P3), bearing steel (GCr15), gray iron (HT250), and other raw materials. According to different bearing raw materials, the scope of application is also different.

Advantages of oilless bearings

The main advantages of oil-free bearings are: good hardness, high wear resistance, high compressive strength, long life, can be used without oil supply, high load, low speed, and can still exert superior performance and superior chemical resistance. High performance, corrosion resistance, flexible design, simple and convenient, rich standard products, can be used with standard shafts.

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Application Of Oil-free Bushing

Oilless bearings are widely used in metallurgical continuous casting machines, train supports, steel rolling equipment, mining machinery, ships, steam turbines, and other high temperature, high load, low speed, and heavy load occasions; in low load, high temperature, medium speed and other occasions, such as fireplaces Doors, oven raceways, rubber machinery, light industrial machinery, machine tool industries; its end face can be welded and installed with the substrate, so it is suitable for metallurgical machinery, construction machinery, oil conveying machinery and other fields that cannot be refueled; in hoisting machinery The supporting parts of the machine are specially adapted, such as hoist support, crane support, and excavator support.

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oil-free graphite bushings
oilless bronze bushing, Self Lubricating Bushes

Oilless Bearing Supplier – China Supplier

The bearing base is made of tin bronze, fierce bronze, brass, cast iron or stainless steel, and plastics can also be used if necessary, according to different working conditions such as high temperature, low temperature and corrosive medium. Targeted selection of bearing matrix and solid lubricant combinations. Therefore, the production of such bearings is not limited by size and shape, and can be manufactured according to user needs. This type of bearing has the characteristics of easy starting, low friction, convenient maintenance, and wide operating temperature. When the bearing is in motion, due to heat and friction, the solid lubricating material continuously seeps out and transfers, and at the same time, the matrix wears and the solid lubricating material is gradually exposed. Therefore, the embedded composite material has the ability to transfer and repair itself, so it has a long service life.

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guide bushes graphite solid bronze

Bronze Bushing Material

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graphite bronze bushing

Custom Bronze Bushing

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oilless bearing bushing

Graphite Plugged Bearing

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