Oil-Free Self-Lubricating Triple Composite Bushing

Definition

SF-1 adopts a three-layer composite structure: steel back + copper powder layer + PTFE lubrication layer. The steel back provides high strength support and good thermal conductivity. The sintered copper powder layer serves as the connection framework and assists in heat dissipation. The PTFE composite lubrication layer forms a transfer film during friction, achieving permanent self-lubrication without the need for any external oiling. 
This structure combines the high load-bearing capacity of metals with the low friction characteristics of PTFE, with a friction coefficient as low as 0.04 to 0.10. It is widely used in fields such as automobiles, construction machinery, food machinery, and household appliances, and is an ideal alternative to traditional oil-filled bearings.

Product advantages

🔹Three-layer composite structure
Steel backing (strength) + Copper powder layer (heat conduction) + PTFE lubrication layer (self-lubrication), all in one. 
🔹Permanent self-lubrication
No external grease is required. A stable transfer film is formed during operation, with a friction coefficient of only 0.04 to 0.10. 
🔹High load-bearing capacity
The static load can reach 250 MPa, and the dynamic load 140 MPa, meeting the requirements of heavy-duty conditions. 
🔹Wide temperature range applicability
- Stable operation within the temperature range of -50℃ to +250℃, suitable for alternating cold and hot environments.

⚙️ Typical Applications 
✔ Automobiles: Steering knuckle, shock absorber, pedal mechanism
✔ Construction machinery: Hydraulic cylinder, joint bearing
✔ Food machinery: Filling machine, packaging equipment (optional FDA version)
✔ Household appliances and office equipment: Washing machine, printer, power tool

Why choose us?

Q1: What are the differences between the white graphite copper sleeve and the ordinary graphite copper sleeve?
A: The traditional black graphite is prone to falling off and causing pollution. Our white graphite does not fall off, does not produce dust, is resistant to high temperatures (400°C), and is electrically insulating. It is suitable for clean environments such as semiconductor, food and pharmaceutical industries.
Q2: Can it really be completely without lubrication?
A: Yes. The solid lubricant embedding technology enables lifelong maintenance-free operation. There is no need for external lubricating grease, which saves operation and maintenance costs and eliminates oil pollution.
Q3: What is the working temperature range?
A: -200°C ~ +400°C (instantaneous 450°C), which is much higher than that of ordinary self-lubricating bearings. It is suitable for extremely cold and high-temperature baking equipment.
Q4: Can non-standard customization be supported?
A: Full-size non-standard customization is supported. New customers can apply for two free samples.
Q5: Which industries are applicable?
A: Semiconductor, food and pharmaceutical, aerospace and military, new energy, medical equipment, etc., which have requirements for cleanliness or high-temperature resistance.

Factory photos

Hot Tags: oil-free self-lubricating triple composite bushing, China oil-free self-lubricating triple composite bushing manufacturers, suppliers, factory