Metal-Polymer Composite Bearings
JBM-50DH
Steel Bronze Powder with PTFE/Fibre
PRODUCT OVERVIEW
Features & Benefits
Built upon the foundation of the standard JBM-50 series, the JBM-50DH is distinguished by an enhanced sliding layer thickness. This design facilitates post-assembly machining, enabling precise calibration of clearance or interference fits. Consequently, it ensures sustained operational stability under specific torque conditions and effectively maintains torque attenuation within optimal limits.
MATERIAL COMPOSITION 
Structure
| Layer | Material | Thickness | Function |
|---|---|---|---|
| 1 | PTFE/Fibre mixture | 0.03-0.08mm | Provides an excellent initial transfer film, effectively coating the mating surfaces of the bearing assembly to form an oxide-type solid lubricant film. |
| 2 | Sintered bronze powder | 0.20-0.35mm | Ensures maximum thermal conductivity away from the bearing surface and serves as a reservoir for the PTFE mixture. |
| 3 | Low-carbon steel | Base | Delivers exceptionally high load-carrying capacity and excellent heat dissipation. |
| 4 | Plating | - | Provides good corrosion resistance. |
SPECIFICATIONS
Technical Data
max load
- static 250 N/mm²
- very low speed 140 N/mm²
- rotating oscillating 60 N/mm²
max pv dry running
- short term operation 3.6 N/mm²*m/s
- continuous operation 1.8 N/mm²*m/s
temperature limit
-195℃ ~ +280℃
friction coefficient
0.05~0.20
max speed
- dry running 2 m/s
- hydrodynamic operation >2 m/s
thermal conductivity
42 W(m*K)⁻¹
coefficient of thermal expansion
11*10⁻⁶*K⁻¹
WHERE IT'S USED
Typical Applications
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