Self-lubricating steel bush for longer life

Sliding Bush & Bearing Experience

Often manufacturers split bush bearing, also known as sliding bush bearings, as a very reliable self-lubricated bushing material for bearings. Composite plain bearings are available, composite bushings, thrust washers and strips, straight and flanged wrapped bronze bush…


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Split Bush Bearing

POM Composite Bushing Supplier, Metal-Polymer Plain Bearings Grease Lubricated

  • Features: POM edge-lubricated bushings for grease or oil-lubricated applications

    • Standard parts contain grease indentations in the sliding layer; plain sliding layer available on request
    • Optimal performance at relatively high loads and low speeds
    • Suitable for linear, oscillating and rotary motion
    • Extensive parts inventory
  • Composite Bearing forms available in standard dimensions

    • Cylindrical bushes
    • Flanged bushes
    • Thrust washers
    • Sliding plates
  • Bushing bearing parts made to order: cylindrical bushes with non-standard lengths and wall thickness, flanged bearings, hexagonal and square bores, liner on outer diameter, customized bearing designs

  • Oil or grease-lubricated bearings. Carbon steel shell with a sintered bronze layer with a pom polymer layer. Sometimes referred to as a ‘Wrapped Bush’ or ‘Glacier Bush’. Offering Cost-Effective Prices. Short Periods Of Delivery. Small Minimum Quantities.

  • Features of pom bushings, The Self-Lubricating Effect, metal bushing materials consist of steel backed, fibers and filling materials, and solid lubricants.

  • However, all pom composite bushings have certain general properties in common.

  • The split bush bearing is made of high quality low carbon steel with sintered spherical bronze layer in the middle and modified POM surface by rolling. Under the condition of boundary lubrication, it can be used for a long time without oil, and there is an oil pit on the surface of the wear-resisting layer. Products are widely used in metallurgical machinery, mining machinery, water conservancy machinery, automobile, construction machinery, agricultural machinery, steel rolling industry, etc.

Sleeve Bearing Bushing Type Split Bearing Bushes

These POM Bush Bearings are widely used in the Machinery Industry

(Inside Diameter x Outside Diameter x Length)

Measured in Millimeters

Marginally lubricated bushings for grease or oil lubricated applications · Standard parts contain grease indents in the sliding layer

– Your Metal Polymer Bush Manufacturer in China, Click to download the following split bush bearings catalog, Polymer Bush Manufacturer, Get an Instant Quote.   Steel Backed Bushing with POM coating contained grease lubrication indents. Thin-walled bearings are suitable for high loads at low speeds. Oil or grease-lubricated bushing bearings with a carbon steel shell and a sintered bronze layer containing a co-acetal polymer layer. Also available in flanged size.

bushing catalog

Boundary Lubricating Bearings

Providing ultimate composite bush solutions to the world.

Polymer bushing, also known as the self-lubricating bearing, is ideal for carrying heavy loads. Its low friction and wear-resistant qualities make it the best among others.

One-stop solution for a wide range of metal composite polymer bushing. We serve globally. Our competitive prices and efficient before and after-sales services have turned our customers into potential stable clients.

Polymer Bush Description

Suitable for long-term use under boundary lubrication without maintenance; recommends initial grease, oil hole Boundary lubricating bearings surface can guarantee the best fat distribution, while refueling process can greatly improve the life of the product; suitable for heavy load at low-speed rotary motion and the rocking motion; excellent carrying capacity, low friction coefficient and low wear rate; no water absorption and oil absorption, dimensional stability; after the press-fit bearing can be processed again to get better tolerance.

Polymer Bush Technical Parameters

load pressure P(Dry friction)
Static load140 [ N/mm2 ]
Dynamic load

70 [ N/mm2 ]

Max line speed V
Grease Lubrication2.5 [ m/s ]
PV value limit
Grease Lubrication2.8 [ N/mm2 ]
Friction Coefficient u
Grease Lubrication0.06~0.12
Mating Axis
Hardness> 270 [ HB ]
Roughness0.4~1.25 [ Ra ]
Working temperature-40~+120 [ ℃ ]
Thermal conductivity52 [ W/mk ]
Coefficient of linear Expansion11×10-6/K [ Axial ]
Outside surface Platingcopper/tin

Polymer Bush Application Features

POM Boundary lubrication bushing is based on steel as matrix, middle sintering spherical bronze powder, surface rolled modified POM (POM), and contain storage pits. It is suitable for normal temperature conditions, the low-contained place, replace the traditional copper sleeve both to reduce costs and extend service life. On the rolling mill use, to save fuel frequency, simplifying replacement program.

Polymer Bush Available forms

Pedal assembly, balance bushings, brake calipers, steering main pin sleeve jacket and truck tailgate, truck, crane, truck cranes, forest machinery, packaging machinery, construction machinery, hydraulic motors, agricultural machinery and mining machinery, metallurgy machinery, irrigation machinery, automobile, steel rolling industries.

Metal Composite Polymer Bushing Selection

It is a high-quality composite bushing. You can use them in printing, woven, tobacco and gymnastic machinery, and pneumatic cylinder making industries.

Customized Metal Polymer Bushings

Such products are generally referred to as oil-free bearings or composite bearings, because the products can be used without refueling. The structure is simple and the maintenance is convenient. The structure can be divided into straight column, rib type, flat gasket type and plane guide plate type;

According to the base material, it can be divided into the following types:

1. Low carbon steel substrate (SF-1): It is a high-quality low carbon steel cold-rolled plate as the substrate, sintered spherical bronze powder in the middle, and the surface is rolled with modified PTFE. The carbon steel substrate bears the load and is specially formulated for compound lubrication. The material acts as a lubricant. It has the characteristics of high bearing capacity, impact resistance, high temperature resistance and strong self-lubricating ability;

2. Stainless steel substrate (SF-1S): Take 304 or 316 stainless steel plate as the substrate, sinter spherical bronze powder in the middle, and roll the modified PTFE anti-friction layer on the surface or directly spray the PTFE anti-friction layer. It has the advantages of good self-lubrication, wear resistance and corrosion resistance. The products are used in acid-base flowmeters, pump valves and corrosion-resistant parts in the marine industry in the chemical industry;

3. Bronze matrix (SF-1B): The phosphor bronze alloy is used as the matrix, the spherical bronze layer is sintered in the middle, and the mixture of PTFE and oil-clearing fiber is rolled on the surface. It has the advantages of excellent self-lubrication, low coefficient of friction, corrosion resistance, and no sparks when impacted. Products are widely used in metallurgical machinery, continuous casting machines, cement grouting machinery, screw conveyors, gas valves, etc.

4. Low carbon steel base body with oil pockets (SF-2): High-quality low carbon steel cold-rolled sheet is sintered spherical bronze powder in the middle of the base body, and the surface is rolled with modified polyoxymethylene (POM), and contains oil storage holes. It is enough to lubricate once every time (fill the oil pocket with grease). Under the condition of boundary lubrication, it can be used for a long time without refueling, and has the characteristics of low cost, long life, saving refueling frequency, and simplifying replacement procedures. It is suitable for low-speed and medium-load places under normal temperature conditions, and is widely used in automobile chassis, forging and pressing machine tools, metallurgical mining machinery, construction machinery, water and electricity, and steel rolling industries;

Use features:

The pairing conditions are wide, and shafts made of stainless steel, chrome-plated steel, hard anodized aluminum, etc. can be used for PTFE-based bearings. It is recommended that when the compound is less than 49MPa, the shaft surface hardness is greater than HB120, and the roughness is less than 0.8μm. When the load>49MPa, the shaft surface hardness>HRC50, the roughness<0.6μm. If stainless steel or hard chrome-plated shaft is used, the service life of the bearing will be extended, but the roughness of the shaft is required to be > 0.4μm. After grinding the surface of the shaft, the abrasive particles on the surface should be removed, and the grinding direction is recommended to be consistent with the moving direction of the bearing;

Ambient temperature:

This condition has a great influence on the service life of the bearing. Under dry friction conditions, the frictional heat generated by the friction surface of the bearing depends on the PV value. Given the PV factor, the bearing temperature depends on the surrounding environment. Ambient temperature, bearing seat and heat dissipation to the abrasive surface;

Lubrication: Although PTFE antifriction layer bearings are designed for dry friction conditions, they perform better under lubricated conditions. PTFE antifriction layer bearings can be used in most lubricants: such as water, lubricating oil, mechanical oil, refrigerant, etc. Generally speaking, as long as the PTFE anti-friction layer and alloy layer of the bearing are not chemically corrosive, they can be used. If there is any doubt about this, the bearing can be immersed at room temperature for a week for observation. If there is obvious color difference on the surface and the copper powder layer has obvious microscopic changes, the surface bearing is not suitable for use in this working condition;

Product running-in period: After the running-in period, the wear rate will be reduced to a minimum value, and the exposed area of ​​the copper powder layer will also increase;

50% of the effective service life: Under normal operating conditions, the PTFE mixture will quickly transfer to the surface of the counterpart and physically bond with it, that is, the initial wear is about 0.015mm, which is about 10% of the total length of the exposed bronze on the friction surface , while the excess PTFE mixture falls off as fine flake particles;

End of service life: As the area of ​​the bronze matrix exposed on the friction surface becomes larger and larger, and the wear rate increases, the service life of the bearing is approaching the end; the area of ​​the bronze matrix exposed at this stage accounts for at least 30% of the bearing surface area. 70, the radial wear rate is about 0.06mm.

Metal matrix composite bearing installation:

Composite anti-friction layer bearings are generally finished parts, which can be used directly after assembly, and the inner hole is no longer processed by reaming and boring. The following is the product installation diagram:

Introduction of polytetrafluoroethylene (PTFE): It is a synthetic polymer material with the characteristics of acid and alkali resistance and resistance to various organic solvents, and is almost insoluble in all solvents. At the same time, polytetrafluoroethylene has the characteristics of high temperature resistance, its friction coefficient is extremely low, and PTFE has outstanding non-stick properties, which limits its industrial application. It is this characteristic, so it is an excellent anti-stick material. This property makes it extremely difficult to bond with the surface of other objects, so it can be used for lubrication. This polymer compound, whose structural formula is -[-CF2-CF2-]n-, has excellent chemical stability and corrosion resistance, and is one of the best corrosion resistance materials in the world today. In addition to chlorine trifluoride, chlorine pentafluoride and liquid fluorine, it is resistant to all other chemicals, and it does not change when boiled in aqua regia. It is widely used in various occasions that require resistance to acid, alkali and organic solvents. It has sealing, high lubricating and non-stick properties, electrical insulation, good anti-aging ability, and excellent temperature resistance (can work at temperatures from +250°C to -180°C for a long time). Teflon itself is not toxic to humans. Use temperature -190 ~ 250 ℃, allowing rapid cooling and rapid heating, or alternating hot and cold operation. Pressure -0.1~6.4Mpa (full vacuum to 64kgf/cm2) (Full vacuum to 64kgf/cm2).


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Low Cost Plain Bearing FAQ – Questions and Answers

Always self-lubricating & grease-free

Ready & Waiting To Assist

  • Metal-polymer composite bearings are characterized by a combination of plastic and metal materials.

  • This composite material achieves its low-wear sliding characteristics, high load-carrying capacity and thermal conductivity.

  • Its static load can reach 250 N/mm². This material can also be used in water or other media due to its high moisture resistance.

Cost-effective, Slide bearing technology

Metal polymer composite bearing

Metal polymer composite bearings. This composite bearing plain bearing is particularly effective in oscillating applications and has a longer rating life than existing bearing types. Furthermore, metal-polymer composite bearings are also available as lead-free, so they are also environmentally friendly.

Low-wear sliding properties

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Oil storage pit on the surface of the layer

Ready & Waiting To Assist

  • Steel-based copper-plastic composite bushing cylindrical Bushing type bushing processing and manufacturing

  • This composite material achieves its low-wear sliding characteristics, high load-carrying capacity and thermal conductivity.

  • Its static load can reach 250 N/mm². This material can also be used in water or other media due to its high moisture resistance.

Environmentally friendly plain bearing

Boundary lubrication lead-free bearing

  1. modified polyformaldehyde (POM) and lead mixture 0.3~0.5mm, with high performance and low coefficient of friction even in the case of instantaneous lack of oil. The bearing surface has a regular arrangement of oil storage pits with spiral angle, and when assembled, it must be coated with lubricating grease.
  2. The copper powder layer 0.2~0.3mm has very good bearing capacity and sex, and good thermal conductivity can transfer the heat generated during the operation of the bearing in time. The composite material can penetrate into the gap of the copper powder ball, which improves the bonding strength.
  3. low carbon steel 0.4~2.2mm, improve the bearing’s bearing capacity and heat transfer effect.
  4. Copper/tin plating, copper plating 0.005mm, tin plating 0.002mm, tin plating with

Design, bearing materials and bushing properties

Choosing The Plain Bushing Structure

Self-lubricating bearing material reference, sliding bearing material performance comparison, application range of oil-free bearing。Metal-polymer composite bearings are cost-effective products with minimal application space and relatively high sliding speeds. Such plain bearings include bushings, flanged bushings, thrust washers and sliding bars. The excellent material forming performance also makes it possible to design components to complete different rotary, linear and oscillating motions according to the special needs of customers.

Self-lubricating bearing material

1. Bearing material

anti-friction material


Bearing materials with special properties used in plain bearings

2. Multilayer materials

Bearing materials consisting of two or more layers of different materials

3. Backing material

material used to make the backing

4. Composite materials Bearing materials synthesized from different components (metals, plastics, solid lubricants or fibers).

5. Sintered bearing material

Sintered materials Bearing materials for the sintering process

6. Friction compatibility The bearing material prevents adhesion with the journal material during friction, so as to optimize the friction performance.

7. Compliance The bearing material relies on the elastic-plastic deformation of the surface to compensate for the poor initial fit of the slide surface.

8. Run-in property means that the bearing material can ensure low friction, high wear resistance and anti-seizure performance after initial run-in under the specific shaft material and specific lubricant.

9. Embeddability The bearing material allows the copper backing material to combine the performance of a bearing with sufficient bonding strength

10. Bonding ability The copper backing material of the lining material is combined with the performance of the bearing with sufficient bonding strength.

11. Anti-seize The anti-seize performance of bearing materials in tribological systems

12. Wear resistance The wear resistance of bearing materials in a tribological system (usually expressed in terms of wear rate or degree of wear)

13. Relative wear resistance The ratio of wear resistance of a bearing material to a standard material under the same conditions

14. Latitude stability The ability to maintain desired performance over a wide temperature range

15. Fatigue resistance The performance of bearing materials against fatigue damage

Sliding bearing material:

1. Base material or backing material:


Types of

Common materials

Related standards


Machining Copper Alloys

CuSn6.5-0.1, H65, H59, QAL9-4, CuSn8P

GBT2059 Copper and copper alloy strip GBT4423 Copper and copper alloy drawn rod. GBT13808 Copper alloy extruded rod. GB 10449 Forged copper alloy

Cast copper alloy

ZCuSn5Pb5Zn5, ZCuSn10Pb1 ZCuAl9Fe4Ni4Mn2, ZCuAl8Mn13Fe3Ni2 ZCuPb10Sn10, ZCuPb20Sn5 ZCuZn25Al6Fe3Mn3, ZCuZn26Al4Fe3Mn3

GB 1176-1987 Technical conditions for cast copper alloys

Cast tin-based alloy

Cast lead-based alloys,

CuSn6Zn6Pb3, FWCuSn10

Wear-resistant cast iron

Alloy steel

Carbon structural steel

Bearing steel


composite material

Polytetrafluoroethylene (PTFE), Polyoxymethylene (POM)

GB/T27553 Plastic-bronze-steel-backed three-layer composite self-lubricating sheet technical conditions

2. Wear-reducing lining material:

When designing sliding bearings, a combination of several materials is sometimes considered, which can give full play to the advantages of various materials and reduce costs appropriately. For example, steel-based products have high load-carrying properties, but their poor wear reduction properties will lock up or scratch the shaft with the matching shaft. If the wear-resistant layer of the steel-based product is covered with a material with good lubricity to isolate the two, it can play a very useful effect. The wear-reducing lining is generally covered on the friction surface of the bearing through sintering, rolling and casting processes. At present, the most common application of self-lubricating bearings is the method of embedding solid lubricants on the inner wall or matrix of the bearing. The materials of the anti-friction layer are roughly divided into the following categories: (Executive Standard: JBT 7924-1995 Metal Multilayer Materials for Sliding Bearings Thin-walled Bearings)


Common grades

Processing methods


Standing or continuous casting on the wear surface

Soft, corrosion-resistant, low fatigue strength and load-carrying capacity. It has good compliance and compatibility.

Rolled on the friction surface

Moderate fatigue strength and bearing capacity, good corrosion resistance, good sliding performance and other characteristics.

Copper base alloy

CuPb10Sn10, CuPb24Sn4, CuSn6.5-0.1, CuSn6Zn6Pb3

Continuous casting or sintering on the friction surface

Has high fatigue strength and bearing capacity, high impact force. Can be hardened shaft fit.

composite material

Modified polytetrafluoroethylene (PTFE) modified polyoxymethylene (POM)

Rolled on the friction surface

The hardness is low, it can be matched with the flexible shaft, and it can be used without maintenance only by initial oiling.


Mixed copper powder for sintering, or directly inlaid on the friction surface

Conductive, light weight, burr-free, high temperature resistant, chemically stable, and excellent in lubricating properties

Non-conductive, important solid lubricant, especially suitable for high temperature and high pressure, with diamagnetic properties.

Zinc stearate

Mixing copper powder or iron powder to make powder metallurgy products

Thermal stability and lubricity are very good.

Sliding bearings – Terms, definitions and classifications – Design, bearing materials and their properties

POM split bushings, thrust washers and strips

Split bush bearing are flexible, maintenance-free and come with excellent sizing ability.

With the split pom bush plain bearing you can replace the ball bearing in the upper part of the headset and save weight again. Carbon Composite Materials: Understanding Metal Polymer Bushing.


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Design, bearing materials and application

Rich application, high plain bearing performance

Metal-polymer composite bearing, low-wear sliding characteristics, maintenance-free or low-maintenance

Self-lubricating composite bearings are used in a wide variety of industries due to pioneering designs that solve long-standing challenges in many industries: agriculture, off-highway equipment, automotive including trucks, garden, lawn and outdoor equipment, hydraulics and valves, Home appliances and consumer goods, material handling, medical and dental, packaging, marine, recreational vehicles, railway equipment, textile equipment and tools are all its application directions, which can be said to cover all aspects of modern life technology society! high product performance

The new metal-polymer composite bearing includes three different material types: bearings with maintenance-free or low-maintenance materials, which are named PTFE and Pom. The two are structurally similar: the porous bronze sintered structure is applied to a steel or copper backing and infused with a special plastic compound. Solid lubricants form a lubricating film between the sliding surfaces, resulting in low-noise operation and a low coefficient of friction throughout use.

Composite bearings of PTFE are basically maintenance-free, that is, there is no requirement for lubrication during the entire operation. Polytetrafluoroethylene (PTFE) and various chemically inert additives can be used as lubricants. Such bearings are typically used in fluid technology, sports equipment, medical or electronic equipment, and in the automotive sector.

POM composite bearings are low maintenance and require grease lubrication during initial operation. The sliding layer is mainly composed of polyoxymethylene (POM), a polymer thermoplastic material characterized by low friction values ​​and chemical and thermal stability. This material is mainly used in production machinery, construction, agricultural machinery, and commercial vehicles.

The bearings of the POM sliding layer are maintenance-free film bearings. They are based on a grid structure in which a sliding layer of PTFE and additives is rolled and sintered. This structure can be used both as a base to bear the load and as a sliding layer. There are sliding layers containing PTFE on both sides of the membrane, so that both the inside and outside of the bushing can slide. Another advantage of this material is its ease of molding. Such film bearings are typically used in equipment, tools and hinges.

It is an exporter of self-lubricating bearings and sliding products, and is also a well-known supplier of high-precision oil-free bearings in the fields of gear pumps, gearboxes, pipeline valves and other applications.

By providing self-lubricating bearing services to the global market, it provides rolling bearing, plain bearing and graphite copper sleeve technology to about 60 different industrial sectors around the world. The product range includes custom self-lubricating bearings, oil-free bearing products, from miniature bearings as small as a few millimeters, to large oil-free bearings with an outer diameter of several meters for wind turbines. , which has laid a good foundation for providing long-term high-quality and convenient services to domestic and foreign users

Cost down, life up with self-lubricating metals

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    “Composite Bushings Model Selection,Low Friction”

    Export experience for plain bearings. With testing and production in the USA, Germany, Brazil, Slovenia and China, efficient and environmentally friendly tribological solutions are designed in cooperation with customers worldwide. Our engineers bring their expertise and love of tribology to use in a variety of fields, from automotive to industrial manufacturing.

    Cost down, life up, High-performance self-lubricating bushes