What Are The Benefits Of Using Graphite Materials For Bushings?

What are the benefits of using graphite materials for bushings?

Nowadays, there are many kinds of bushings on the market, among which graphite bushings have attracted much attention. Graphite bushings have become the best choice in this field due to their multiple advantages. The specific performance is as follows:
1. Graphite bushings have excellent self-lubricating properties. Their layered crystal structure can form a transfer film during the friction process, greatly reducing the friction coefficient. Compared with metal bushings, they can reduce friction loss by more than 50%, which is particularly suitable for oil-free lubrication conditions.
2. Graphite bushings have outstanding high temperature resistance. They can withstand temperatures above 600°C in a non-oxidizing environment. The thermal expansion coefficient is only 1/3-1/5 of that of metals, which can effectively avoid high-temperature jamming.
3. Graphite bushings have excellent chemical stability, and their acid and alkali corrosion resistance far exceeds that of metal materials. Their service life can be extended by 3-5 times in corrosive environments such as chemical industry and electroplating. Its electrical and thermal conductivity (thermal conductivity of 100-150W/m·K) can also effectively conduct friction heat and avoid heat accumulation.
In addition, the density of graphite material is only 1/5 of that of copper, which can reduce the weight of parts and has good machinability. Complex structures can be directly formed by turning to reduce processing costs.
In practical applications, graphite bushings perform well in food machinery, chemical pumps and valves, high-temperature furnace equipment and other fields, especially under dry friction, low-speed and heavy-load conditions, and their wear resistance is 2-3 times higher than that of bronze bushings. After being modified by impregnation with metal or resin, its mechanical strength can be increased to more than 40MPa, further expanding its application range. Overall, graphite bushings have become an ideal choice for special working conditions due to their advantages such as long-term maintenance-free and strong environmental adaptability.