The grinding ring machine has high working temperature, poor lubrication conditions and difficult maintenance. The ordinary copper bushings or bushes have poor lubrication at high temperatures, and are prone to seizure or wear; in order to meet the requirements of the rolling mill manufacturer for the rotating parts And life requirements, our company recommends customers to use self-lubricating graphite copper sleeve products; self-lubricating graphite copper sleeve products use centrifugal casting high-strength copper alloy as the base body, the surface is set with special formulated solid lubricant; self-lubricating graphite copper sleeve on the ring rolling machine Very suitable for use, the grinding ring machine has high working temperature, poor lubrication conditions and difficult maintenance. Compared with ordinary copper sleeve products, self-lubricating graphite copper sleeve can better adapt to high temperature working environment, has higher reliability, and can be used for a long time. Maintenance free and very long service life.