BNB Graphite-Plugged Self-Lubricating Bushings
GRAPHITE-PLUGGED BUSHINGS
Solid metal. Built-in lubrication.
BNB bushings combine a copper-alloy body with embedded graphite plugs. The metal supports the load, while the plugs supply solid lubricant to the sliding surface during movement.
Standard sizes and production to your drawings are available. Send your dimensions, operating conditions and quantity for a quotation.
Features
Designed for sliding bearing positions where access for routine lubrication is limited. Material selection should account for load, motion, temperature and the surrounding environment.
- Solid copper-alloy construction with distributed graphite plugs.
- Cylindrical sleeves manufactured to the required bore, outside diameter and length.
- Stock sizes and drawing-based production, subject to specification and availability.
Structure
Metal body: CuZn25Al5Mn4Fe3 provides the bearing structure and load support.
Graphite plugs: Embedded solid lubricant helps form a lubricating film on the mating surface as the bearing moves.
Mating components: Shaft finish, fit and installation conditions should be reviewed when selecting the bushing.
Material Properties
| Type | BNB |
|---|---|
| Material | CuZn25Al5Mn4Fe3 |
| Density | 7.8 |
| HB Hardness | ≥210 |
| Tensile Strength MPa | ≥750 |
| Yield Strength MPa | ≥450 |
| Elongation % | ≥12 |
| Thermal Expansion Coefficient | 1.9×10*%/℃ |
| Max. Operation Temp. | -40℃～+250℃ |
| Max. load MPa | 50 |
| Max. speed m/s | Dry 0.5 |
| Lubricated 1 | |
| Max. PV (N/mm2*m/s) | Dry 1.65 |
| Lubricated 3.25 |
Selection depends on the complete operating conditions. Maximum load, speed and temperature values should not be assumed to apply simultaneously.
Request a BNB Bushing Quotation
Please provide the inside diameter, outside diameter, length, tolerances and quantity. Include load, speed, temperature and lubrication conditions where available.