TCB20 Boundary Lubricating Bushings
Structure Characteristics and Applications
TCB201 is designed for marginal lubricating bushing. It is backed with copper-plated steel with porous bronze sintered on it and polymers (POM) imbedded into the bores of the bronze. The steel back provides the products with high quality low carbon steel. Oil dents stamped on the surface of the polymer can achieve good lubrication between the bushing and its mating axis. It is of good anti-abrasion and load capacity. The plating coating on the surface is erosion protective. And it is environmental protective as no lead included in the surface polymer POM. Products of TCB20 series are widely used on automotive chassis, forging machines, mine quarrying machines, metal melting and casting machines and in water irrigating and steel rolling industries.
Physical and Mechanical Performance
Physical and Mechanical Performance
| Performance Index | Data | |
| Max Load P | Static Load | 250N/mm? |
| Dynamic Load | 140N/mm? | |
| Linear Velocity V | Grease Lubrication | 2.5m/s |
| Max PV value | Grease Lubrication | 2.8N/mm? ·m/s |
| Friction Coefficient | Dry Lubrication | 0.06~0.12 |
| Mating Axis | Hardness | >270 HB |
| Roughness | Ra=0.4~1.25 | |
| Working Temperature | -40~+120℃ | |
| Heat-conducting Coefficient | 52W/(m·k) | |
| Heat-expansion Coefficient(Axial) | 11×10-6/K | |
Normally, the surface polymer of TCB201 is of chemical-erosion resistant quality. So its erosion-prevention quality is primarily decided by the quality of the steel back and its plating layer. Air-erosion could be effectively prevented if the steel back is plated with bronze or tin. If the bushing is to be used in erosive environment, the steel back needs to be plated with zinc, etc.
Anti-abrasion Performance
Anti-abrasion Performance
Main Factors that Influence the Service life of the Bushing
Main Factors that Influence the Service life of the Bushing
1).PV ValuePV value is an effective criterion to calculate the service life of TCB201. If there is need to prolong the service Life, PV value must be reduced.
2).Environment Temperature
When the environment temprature is above 40℃ , performance of TCB201 will be obviously debased. Therefore, the higer the working temperature is, the shorter the life of the products would be.
3).Quality of the Mating Surface
When Roughness of the mating surface Ra=0.4~0.63, service life of TCB201 could be obviously prolonged.
Besides the standard products displayed in the list of this catalogue, we can also supply non-standard products or develop according to customer design.
TCB20 Classification
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TCB 201
Its material structure is Steel base + Bronze powder + POM (yellow). It has good load capacity and wear-resistant. It’s applied to the vehicle chassis, forming machine tools, steel metallurgical machinery, mineral mountain machinery, hydraulic...
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TCB 202
Its material structure is Steel base + Bronze powder + POM (orange). It can offer the good load capacity and wear-resistant. It is applied to vehicle chassis, forming machine tools, steel metallurgical machinery, mineral mountain machinery...
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TCB 203
Its material structure is Steel base + Bronze powder + POM (blue). It has good load capacity and wear-resistant. It’s applied to the vehicle chassis, forming machine tools, steel metallurgical machinery, mineral mountain machinery, hydraulic...
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TCB 206
Its material structure is Steel base + Bronze powder + PTFE and PEEK. It works in high temperature condition like high-pressure gear pump, water injection pump, hydraulic motor and spray painting food processing.
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TCB 2000
Its material structure is Bronze mesh + PTFE. This product is widely applied to textile machine, joint bushing, door hinges and joystick of automobile, etc.
Product Classification
TCB10 Self-Lubricating Multilayer Composite Bushing TCB20 Boundary Lubricating Bushings TCB30 Bimetal Bushing TCB40 Oil Sintered Bearing TCB50 Solid Lubricating Bearing TCB60 Steel Bearings TCB70 Spherical plain bearing TCB80 Casting Bronze Bearing TCB90 Wrapped Bronze Bearing TCB-21 Filament Wound High Load Self-lubricating Bearings
