Bronze Graphite Plugged Bushings
Bronze graphite plugged bushings are advanced self-lubricating bearings engineered for demanding industrial applications. These premium bushings are precision-machined from continuous cast bronze and strategically plugged with solid graphite lubricant plugs. The innovative design ensures that a bushing and its mating surface maintain optimal separation through a consistent film of lubricant, eliminating the need for supplementary lubrication systems.
The self-lubricating mechanism begins when the shaft starts rotating. A thin film of solid graphite lubricant is automatically transferred onto the shaft surface, creating a protective barrier that prevents metal-to-metal contact. This continuous lubrication process ensures smooth operation and exceptional longevity, even in applications where traditional oil or grease lubrication is impractical, expensive, or prohibited.
Specifiche tecniche
| Grade | 650 | 650S5 | 650W1 | 650W3 | 650S1 | 650S2 | 650S3 |
|---|---|---|---|---|---|---|---|
| Composizione del materiale | CuZn25Al5Mn4Fe3 | CuSn5Pb5Zn5 | CuAl10Ni5Fe5 | CuSn12 | |||
| Density | 7.8 | 7.8 | 7.8 | 7.8 | 8.9 | 7.8 | 8.9 |
| HD Hardness | ≥210 | ≥250 | ≥210 | ≥230 | ≥70 | ≥150 | ≥75 |
| Tensile Strength (MPa) | ≥750 | ≥800 | ≥755 | ≥755 | ≥250 | ≥500 | ≥270 |
| Yield Strength (MPa) | ≥450 | ≥450 | ≥400 | ≥400 | ≥90 | ≥260 | ≥150 |
| Allungamento (%) | ≥12 | ≥8 | ≥12 | ≥12 | ≥13 | ≥10 | ≥5 |
| Thermal Expansion Coefficient | 1.9×10-5/°C | 1.8×10-5/°C | 1.6×10-5/°C | 1.8×10-5/°C | |||
| Max Operating Temperature (°C) | -40~+250 | -40~+400 | |||||
| Max Load (MPa) | 50 | 75 | 75 | 100 | 50 | 50 | 50 |
| Max Linear Speed (m/s) |
Dry Friction: 0.5 Lubrication: 2.5 |
Dry Friction: 0.1 Lubrication: 0.25 |
|||||
| Max PV Value (N/mm2*m/s) |
Dry Friction: 1.65 Lubrication: 3.25 |
1.65 | |||||
| Lubricant | Features | Typical Applications |
|---|---|---|
| SL1 Graphite + Additives |
Excellent chemical stability, low friction coefficient, suitable for use up to 400°C. | General industrial applications, long-term exposure to air. |
| SL4 PTFE + MoS2 + Additives |
Lower friction coefficient, excellent lubricity, suitable for use up to 300°C. | For water or marine environments, such as ships, hydro turbines, or gas turbines. |
Industries and Applications
Bronze graphite plugged bushings excel in challenging environments where traditional lubrication methods fail. Their versatility makes them ideal for:
- Snowmobiles
- Steel mills
- Furnace dragouts
- Drying equipment
- Roasters
- Heat exchangers
- Press dies
- Assembly lines
- Machine tools
- Chain conveyors
- Offshore structures
- Deck cranes
- Argani
- Hatch covers
- Rudder arms
- Hoisting equipment
- Tire mills
- Paper mills
- Toggle link bearings for injection molding machinery
- Mixers
- Grinders
- Pulverizers
- Macchine da costruzione
- Mining rigs
- Arm link bearings
- Power shovels
- Automotive suspension and steering systems
- Railway bogie assemblies
- Marine and shipbuilding equipment
- Hydroelectric and gas turbines
- Attrezzature per la movimentazione dei materiali
- Food processing machinery
- Macchinari tessili
- Printing and converting equipment
- Other high-temperature, heavy-load, or hard-to-maintain environments
Get Expert Consultation
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