CuPb30 Layer Bimetal Bushing
The CuPb30 Layer Bimetal Bushing refers to a bushing made of a bimetallic material consisting of copper (Cu) and lead (Pb) with a Pb content of approximately 30%. This type of bushing has excellent self-lubricating properties due to the presence of lead, which helps reduce friction and wear during operation. Additionally, the copper base provides good strength and conductivity, making it suitable for various applications requiring high wear resistance and electrical conductivity. The CuPb30 layer is typically applied to the inner surface of the bushing, either by casting or other metalworking techniques, to create a wear-resistant and self-lubricating surface.
CuPb30 Layer Bimetal Bushing
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bimetal bearing with steel as backing and sintered CuPb30 as lining layer. It has good performance in the anti-seizing shaft and cover-up an alien substance due to the high lead composition. If over plated certain soft alloy on the bushing, it can be used under high speed and middle or low load,e.g.master bearing shell of the internal combustion engine,connect-rod, and rocket arm bushing.
| Lead bronze alloy | CuPb30 | Temperature Max | 170℃ |
| Load capacity | 25N/mm² | Hardness alloy | HB30~45 |
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The bimetal bushings-700 are bimetal sliding bushings with a steel strip and sintered CuPb30 as the surface sliding layer.
These sliding bushings have good anti-locking protection and a high proportion of lead, meaning that they can bind more dirt particles and impurities, thereby preventing a seize-up.
| SURFACE MATERIAL | LOAD CAPACITY | RESISTANCE ALLOY RANGE | TEMPERATURE LIMIT |
|---|---|---|---|
| CuPb30 | 25 N/mm2 | HB30 HB45 | +170°C |
Structure
- Steel Backing and Bronze Alloy Overlay
1. Sintered bronze powder: good abrasion resistance and excellent bearing capacity.
2. Steel substrate: provides extremely high load-bearing capacity, excellent heat dissipation.
3. The thickness of 0.002mm copper coating ensures good corrosion resistance.
Composition
- Steel + CuPb30 bronze alloy
Bimetal Bushing Characteristics
- Particularly suitable for high specific loads with oscillating movement and low frequency.
- Applicable in difficult operating conditions
- High load capacity, very good resistance to fatigue at high temperatures.
CuPb30 Bi-Metal BushingTechnical Data
Max. Load P | Static | 280 N/mm2 |
Dynamic | 120 N/mm2 | |
Max. sliding speed V(m/s) | 2.5 m/s | |
Max. PV factor (N/mm2.m/s) | 2.8 N/mm2.m/s | |
Operating Temperature | Max. Greased | 150°C |
Max. Oil lubricated | 250°C | |
Coefficient of friction | Greased | 0.05~0.12μ |
Oiled | 0.04~0.12μ | |
Surface roughness (Ra) | ≤0.8 µm | |
Alloy Layer Hardness (HB) | 35-45 | |
Coeff. Of linear expansion | 19x10-6/K | |
Bimetal BushingTypical Aplication
The bimetal bushing-700 CuPb30 bimetal tractor and combine harvester bushing is widely used in high speed and medium load working situations, such as main motor bearing, connecting rod bushing, rocket arm bushing and oil pump side plate etc.
BIMETAL BUSHING
Bimetal Bushing Feature
Steel bearing with lead bronze lining bearing material for oil lubricated applications. This material has a high load carrying capacity and good fatigue properties. It is widely used in automotive applications such as compressor, steering, power steering, pedal bearings, kingpin bushings, tailgate pins, mechanical handling and lifting equipment, hydraulic motors, agricultural machinery etc.
| Chemical Compositions | |||
| Material | Alloy composition | International standard | Alloy hardness |
| Bimetal bushing 800 | JIS-LBC3/SAE-797 | CuPb10Sn10 | HB70-100 |
| Bimetal bushing720 | JIS-LBC6/SAE-799 | CuPb24Sn4 | HB45-70 |
| Bimetal bushing700 | JIS-KJ3/SAE-48 | CuPb30 | HB30-45 |
| Bimetal bushing20 | JIS-AJL/SAE-783 | AlSn20Cu | HB30-40 |
| Tech. Data | ||||
| Max. load | Static | 120N/mm2 | Alloy hardness | 240N/mm2 |
| Dynamic | 60N/mm2 | Temp. | -40°C~+250°C | |
| Max. speed (Lubricated) | 2m/s | Friction coefficient | 0.08~0.20 | |
| Max. PV | 2.8N/mm2*m/s | Thermal conductivity | 60W(m*k)-1 | |
| Breaking Load | 350N/mm2 | Coef. of thermal expansion | 14*10-6*k-1 | |
Bimetal Bearings 700 Feature
700 bimetal bearings are based on sheet steel, the surface-sintered CuPb30Material products. The production due to the high lead content, so both good anti-bite axis and foreign objects are buried.
If the working surface is coated with soft alloy material, it can be used as the main bearing of a high speed, medium and low load internal combustion engine, connecting rod bushing and rocker arm bushing.
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