JBM-850S
Metal Backed Sintered Alloy Bearings with Solid Lubricants
Features & Benefits
The JBM-850S features a composite multi-layer structure that combines the strength of a steel back with the low-friction properties of a solid-lubricant-filled sintered alloy. The evenly dispersed graphite ensures consistent performance even during micro-range motions where oil films cannot form. A key advantage is its machinability; the bearing bore can be machined after installation (unlike typical coated bearings) to achieve precise tolerances.
Structure
| Layer | Material | Thickness | Function |
|---|---|---|---|
| 1 | Sintered Bronze Alloy with Graphite | Sintered Layer | A special sintered copper-nickel/bronze alloy layer acting as the sliding surface. It contains uniformly dispersed solid lubricants (graphite) which release to the surface during wear to lower the friction coefficient. The porous structure is also impregnated with oil (>10% volume) to assist lubrication. |
| 2 | Steel Backing | Structural Base | Provides the mechanical strength and high load-carrying capacity of the bearing. |
Technical Data
max load
- static 100 N/mm²
- dynamic 50 N/mm²
max speed
- dry 0.5 m/s
- lubricated > 1 m/s
max pv
- dry 1.5 N/mm²*m/s
- lubricated 2.5 N/mm²*m/s
temperature limit
friction coefficient
alloy hardness
oil volume
coefficient of thermal expansion
Typical Applications
General Industrial
Widely used in applications requiring high load capacity and low friction where oil supply is difficult, such as automotive die wear plates, plastic injection molding tie-bar bushes, and industrial robots.
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Construction & Heavy Equipment
Suitable for self-lubricating joints in construction equipment.
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