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Self Lubricating Bronze Bushing
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Types of Self Lubricating Bronze Bushing Material & Specification:
Graphite Self Lubricating Bronze Bushing
Graphite Self-lubricating bronze bushing lubrication principle is in the process of sliding friction between shaft and bearing, part of the graphite particles transferred to the friction surface of the shaft and bearing, forming a more stable solid lubrication diaphragm to prevent direct adhesion wear of the shaft and bearing.
Graphite Plugged Bronze Bushings
This rational combination combines the respective performance advantages of metal alloys and non-metallic wear-reducing materials to complement each other, i.e. with the high load-bearing capacity of metals and the lubricating properties of wear-reducing materials. So It is especially suitable for heavy load, low speed, reciprocating or oscillating, and other difficult to lubricate and form oil film occasions, and is not afraid of water and other acid corrosion and scouring.
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Benefit Of Self Lubricating Bronze Bushing
No need for oil supply units, oil filling holes, oil tank machining, etc., which significantly reduces manufacturing costs
The reduction in movement costs significantly reduces the amount of lubricant used and the maintenance costs of the equipment, in addition to eliminating the risks caused by insufficient oil supply.
Reduced design time Oil-free allows for significant simplification of design, structure, etc., reducing costs and saving design time
The use of self-lubricating bearings also improves mechanical properties, extends service life, and increases reliability
Recycling and environmental protection of lubricating oils without the need for waste oil recycling and disposal contribute to environmental protection.
Self-lubricating Bushes VS Oil Impregnated Bronze Bushing
Oil Impregnated Bronze Bushing is a combination of metal powder, there are 10 ~ 40% of the structure of the gap; Graphite plugged bronze bushing matrix is centrifugal casting and made; matrix density is relatively high, higher strength, the service life is longer than Oil Impregnated Bronze Bushing.
Sinter Bronze Bushing
Oil Impregnated Bronze Bushing is a sintered body made of metal powder as the main raw material by the powder metallurgy method. Using the porous nature of the sintered body, it is impregnated with 10% to 40% (volume fraction) of lubricating oil and is used in a self-oiled state. When the bearing temperature rises during operation, the coefficient of expansion of the oil is greater than that of the metal, so it automatically enters the sliding surface to lubricate the bearing. Oiled bearings can be used for a longer period, and are often used in situations where refueling is not convenient.
Graphite Bronze Bushing
Graphite Bronze Bushing is a kind of both metal bearing characteristics and self-lubricating bearing characteristics of the novel lubrication bearing, by the metal substrate to bear the load, the special formula of solid lubricating materials to play a lubricating role. It has a high bearing capacity, impact resistance, high-temperature resistance, self-lubricating ability, and other characteristics. especially for heavy load, low speed, reciprocating or oscillating, and other difficult to lubricate and form oil film occasions, but also not afraid of water and other acid corrosion and erosion.
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Why Use self lubricating bronze bushing?
To ensure the stability and reliability of bronze bearings, most bearings lubricate with oil:
- Reduce internal friction and wear and to prevent combustion:
- Extend the fatigue life of the bearing
- Discharge frictional heat or heat transferred from the outside;
- Provide some vibration absorption capacity from the oil film.
Protecting the Environment & Reliable
However, one of the biggest disadvantages of adding lubricating oil is the need for good sealing properties, otherwise, leakage will occur, and certain equipment with special requirements does not allow lubricating oil leakage, so people use graphite instead of lubricating oil. self-lubrication bronze bushing was invented, which not only has the advantage of containing lubricating oil in the bearing but also eliminates the environmental pollution caused by leakage.
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Bronze Bushing Applications
They are more often used in low-speed, high-load, and severe-duty industrial applications and machinery for iron and steel manufacturing, food processing, injection molding, automotive machines, earthmoving machinery, pumps, and other industries.
Two common self-lubrication bronze sleeve bearing materials and their uses include:
| Material according to DIN material no. | Mechanical properties | Composition in % | Special properties and application examples |
| CuSn7Zn4Pb7-C DIN EN 1982 CC493K Similar materials: CuSn7ZnPb, 2.1090, DIN 1705 (gunmetal, Rg 7, LB 50) C93200 UNS | R m ≥ 260 N/mm² R p 0.2 ≥ 120 N/mm² A 5 ≥ 12 % HB ≥ 70 | Cu 81-86 Sn 5.2-8 Zn 2-5 Pb 5-8 | Most common and inexpensive gunmetal alloy for plain bearings. With medium hardness, it still has good emergency running properties and sufficient wear resistance. Also suitable when using unhardened shafts and light edge pressure. Short-chipping, easily machinable material, good corrosion resistance (also in seawater), soft and conditionally hard solderable. The main areas of application are plain bearings and bearing bushes for general mechanical engineering. Product with information requirements according to the REACH regulation. |
| CuSn12-C DIN EN 1982 CC483K Similar materials: 2.1052, DIN 1705 (SnBz12, Gbz12, LB 65) C90800 UNS, PB 2, BS 1400 | R m ≥ 300 (GC) | ≥ 280 (GZ) N/mm² R p 0.2 ≥ 150 N/mm² A 5 ≥ 6 % HB ≥ 90 | Cu 85 – 89 Sn 10.5 – 13.0 Pb ≤ 0.7 | Tough-hard material with good wear resistance, also suitable for high sliding speeds. Good corrosion resistance (also in sea water). Particularly suitable for parts that have to withstand surface pressure and impact at the same time and are subject to frictional wear. Resistant to cavitation stress. Positioning and sliding strips, plain bearings in machine tools. Product with information requirements according to the REACH regulation. |
| CuSn11Pb2-C DIN EN 1982 CC482K Similar materials: 2.1061, CuSn12Pb, DIN 1705, (LB 66) C92500 UNS | R m ≥ 280 N/mm² R p 0.2 ≥ 150 N/mm² A 5 ≥ 5 % HB ≥ 90 | Cu 83.5 – 87 Sn 10.5 – 12.5 Pb 0.7 – 2.5 | Tough-hard bearing material with good wear resistance and good emergency running properties. Good corrosion resistance (also in sea water). Similar properties to CuSn12-C, comparatively better machinability due to the addition of lead. Edge pressure must be avoided. Suitable for plain bearings with high peak loads, highly stressed adjusting and sliding strips. Product with information requirements according to the REACH regulation. |
| CuSn12Ni2-C DIN EN 1982 CC484K Similar materials: CuSn12Ni, 2.1060, DIN 1705, (LB 68) C91700 UNS, CT2, BS 1400 | R m ≥ 300 (GC) | ≥ 280 (GZ) N/mm² R p 0.2 ≥ 180 N/mm² A 5 ≥ 10 (GC) | ≥ 8 (GZ) % HB ≥ 90 | Cu 84.5 – 87.5 Sn 11 – 13 Ni 1.5 – 2.5 P 0.05 – 0.4 Pb ≤ 0.3 | Tough-hard material with very high wear resistance, also suitable for high sliding speeds and surface pressures. Good corrosion resistance, seawater resistant, resistant to cavitation stress, moderately machinable. High-speed worm and helical gears. Product with information requirements according to the REACH regulation. |
| CuSn8 DIN EN 12163 – 167/12449/1652/1654 CW453K Similar materials: 2.1030, DIN 17662, (Caro Bronze) C52100 UNS PB 104, BS 2870-2875 | R m ≥ 450 N/mm² R p 0.2 ≥ 280 N/mm² A 5 ≥ 26 – 30 % HB – | Cu balance Sn 7.5 – 8.5 P 0.01 – 0.4 | Cold drawn tin bronze with high phosphorus content. Excellent sliding properties, high wear resistance and good heat resistance. Can be used with hardened shafts and sufficient lubrication for high speeds and high loads. Particularly suitable for thin-walled sockets. seawater resistant. Chips not short-brittle. Piston pin bushings, valve guide bushings, gear bushings, machine tool bearings, bolts, screws, spindles, slide shoes. |
| CuSn8P DIN EN 12163, 12449 CW459K Similar materials: 2.1030, (Caro Bronze) | R m ≥ 460 N/mm² R p 0.2 ≥ 280 N/mm² A 5 ≥ 26 – 30 % HB – | Cu balance Sn 7.5 – 8.5 P 0.2 – 0.4 | Like CuSn8 (see above). The increased phosphorus content is said to further improve wear resistance and sliding properties. |
| CuAl10Fe5Ni5-C DIN EN 1982 CC333G Similar materials: 2.0975, CuAl10Ni, DIN 1714 (AlBz10Ni, LB75-1) Cu 95 800, C 95 500 UNS AB 2, BS 1400 | R m ≥ 650 N/mm² R p 0.2 ≥ 280 N/mm² A 5 ≥ 13 % HB ≥ 150 | Cu 76 – 83 Al 8.5 – 10.5 Ni 4 – 6 Fe 4.0 – 5.5 Mn ≤ 3 Zn ≤ 0.5 | Construction material with high strength values, resistant to cold and even hot sea water. Very good heat resistance. Very good fatigue strength in air and sea water. Very resistant to cavitation and corrosion, highly resilient with good wear resistance. Good lubrication required in case of sliding stress. Very good pressure tightness. Very easy to weld. Highly stressed plain bearings and worm gears. Worm and screw gears at the highest tooth pressures. |
| CuAl10Ni5Fe4 DIN EN 12163 / 12167 / 12420 CW307G Similar materials: 2.0966, CuAl10Fe5Ni5, DIN 1766, (LB 75) C63200, C63000 UNS CA 104, BS 2872, 2874, 2875 | R m ≥ 680 N/mm² R p 0.2 ≥ 320 N/mm² A 5 ≥ 10 % HB – | Cu remainder Al 8.5 – 11 Ni 4 – 6 Fe 3 – 5 Mn ≤ 1 Zn ≤ 0.4 | High strength even at higher temperatures up to approx. 400 °C. High fatigue strength even under corrosion stress. Resistant to neutral and acidic, aqueous media and sea water. Good resistance to scaling, erosion and cavitation. Very high wear resistance. Good sliding properties on mating materials with hard surfaces and with proper lubrication. Mechanically and chemically stressed parts in machine building, shipbuilding and mining. |
| CuSn10Pb10-C DIN EN 1982 CC495K Similar materials: CuPb10Sn, 2.1176, DIN 1716 (G-PbBz15, LBB 82) C93700 UNS, LB 2, BS 1400 | R m ≥ 220 N/mm² R p 0.2 ≥ 110 N/mm² A 5 ≥ 8 % HB ≥ 70 | Cu 78 – 82 Sn 9 – 11 Pb 8 – 11 Ni ≤ 2 Zn ≤ 2 Sb ≤ 0.5 | The soft lead bronze is a medium-soft tin-lead bronze with particularly good heat resistance and good emergency running properties with high mechanical values. It has good wear resistance and good running-in properties, is seawater-resistant and insensitive to many alkalis, acids, dust, dirt and edge pressure. Maximum permissible specific surface pressure [p] up to 60 N/mm2 with good cooling lubrication. Very good machinability. Product with information requirements according to the REACH regulation. |
| CuZn37Mn3Al2PbSi DIN EN 12164 – 168/12420/12449 CW713R Similar materials: 2.0550, CuZn40Al2, SoMs58Al2 DIN 17660, C67400 UNS CZ 135 BS, 2870-2875 | R m ≥ 590 N/mm² R p 0.2 ≥ 370 N/mm² A 5 ≥ 10 % HB – | Cu 57 – 59 Mn 1.5 – 3 Al 1.3 – 2.3 Pb 0.2 – 0.8 Si 0.3 – 1.3 Zn balance | Special brass for statically highly stressed bearing points. Construction material with high strength. Good resistance to atmospheric corrosion, slightly aggressive water and gases, and oil corrosion. For high demands on sliding stress, high wear resistance. Medium machinability. Structural parts in mechanical engineering, plain bearings, valve guides, transmission parts, piston rings. Product with information requirements according to the REACH regulation. |
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