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SF-1 Self-Lubricating Bearings in Printing Machinery
Overview SF-1 three-layer composite self-lubricating bearings (DU bearings) are critical components in printing machinery, widely used in modern printing equipment for their oil-free lubrication, low noise, and high precision characteristics. Structural Principle SF-1 adopts a "steel base +...
Description
Overview
SF-1 three-layer composite self-lubricating bearings (DU bearings) are critical components in printing machinery, widely used in modern printing equipment for their oil-free lubrication, low noise, and high precision characteristics.
Structural Principle
SF-1 adopts a "steel base + porous bronze + PTFE" three-layer composite structure:
Steel backing: Provides mechanical strength and thermal conductivity
Sintered bronze layer: Serves as connection skeleton and heat dissipation
PTFE surface layer: Core self-lubricating layer that forms a transfer film during friction to achieve oil-free operation
Key Performance
| Parameter | Value |
|---|---|
| Max static load | 250 N/mm² |
| Max dynamic load | 140 N/mm² |
| Dry friction coefficient | 0.08~0.20 |
| Operating temperature |
-195℃~+280℃ |
Advantages for Printing Machinery
Clean & Oil-Free: Prevents grease contamination of printed products, suitable for food/pharmaceutical packaging printing
Low Noise: 20-30 dB quieter than conventional bearings, improving workshop environment
High Precision: Thin-wall design ensures positioning accuracy of printing cylinders for accurate color registration
Long Service Life: 3-5 times longer lifespan than copper-based bearings, reducing downtime
Typical Applications
Printing cylinder support: Plate/blanket/impression cylinder bearings withstand heavy loads while maintaining rotational precision
Paper feeding mechanisms: Gripper and delivery chain bearings adapt to frequent start-stop operations
Auxiliary systems: Gearbox, ink fountain roller, and dampening system bearings (SF-1S copper-plated type for corrosion resistance)
Selection Guidelines
Calculate PV value (dry friction limit 1.8, intermittent operation 3.6 N/mm²·m/s)
High-temperature environments: select heat-resistant formula; humid environments: choose SF-1S stainless steel base
Counter-shaft hardness >220 HB, surface roughness Ra 0.4~1.25 acceptable
Conclusion
With its unique self-lubricating technology and excellent load-bearing performance, SF-1 bearings have become the ideal choice for printing machinery transmission systems, supporting the printing industry toward high efficiency, green manufacturing, and intelligent development.
If you have need,contact:sales01@ramshin.com
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