JBM-650
Cast Bronze Bearings with Graphite Plugs
Features & Benefits
The JBM-650 is a heavy-duty self-lubricating bearing system designed for extreme operating conditions where oil film maintenance is difficult or impossible. It combines the high load-carrying capacity of a cast bronze alloy with the low-friction properties of embedded solid lubricants. This bearing provides maintenance-free operation, excellent wear resistance, and superior corrosion protection. It is particularly effective in low-speed, high-load applications involving reciprocating, oscillating, or intermittent motion, and can withstand a wide temperature range from -40°C to +300°C (depending on lubricant type).
Structure
| Layer | Material | Thickness | Function |
|---|---|---|---|
| Cast Bronze Base with Solid Lubricant Plugs | Solid Cast | The structure consists of a strong cast bronze-based metal matrix acting as the load-bearing component, with special solid lubricants (such as Graphite or PTFE+MoS2) embedded as plugs. During operation, these plugs transfer a solid lubricant film to the mating surface, enabling self-lubrication without the need for external oil or grease. |
Technical Data
base material grade 650
- material CuZn25Al5Mn4
- density 7.8 g/cm³
- hardness ≥ HB210
- tensile strength ≥ 750 N/mm²
- yield strength ≥ 450 N/mm²
- elongation ≥ 12%
- coefficient of linear expansion 1.9×10⁻⁵/℃
performance limit
- max load 50 MPa (Standard) / up to 100 MPa (Grade 650W3)
- max speed dry 0.5 m/s
- max speed lubricated 1.0 m/s
- max pv dry 1.65 N/mm²*m/s
- max pv lubricated 3.25 N/mm²*m/s
- temperature limit -40℃ ~ +300℃ (Standard)
available solid lubricants
- SL1 Graphite based (Temp limit 400℃) - Suit for general machines and atmosphere
- SL4 PTFE + MoS2 based (Temp limit 300℃) - Suit for water/sea lubrication
Typical Applications
Construction & Heavy Equipment
The JBM-650 is engineered for rigorous environments found in steel metallurgy (rollers), mining machinery, and successive casting machines.
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Oil & Gas
It is a critical component in water engineering projects such as dam gates and hydraulic turbines, as well as in marine applications like ships and turbo generators where corrosion resistance is paramount.
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Automotive
Widely used in automotive production lines, injection molding machines, and plastic industry equipment due to its ability to handle high pressures and intermittent oscillating motions.
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