Suitable for working areas that cannot be refueled, are difficult to refuel, or have high temperatures, with good wear resistance, low friction coefficient, and long service life; Good running performance, low noise, no pollution, and good corrosion resistance; The transfer film formed during operation plays a protective role on the grinding shaft, without any biting phenomenon; Low processing requirements for grinding shafts reduce user processing costs; Due to the use of special materials on the working surface of OOB-30, it has good high-temperature resistance and high wear resistance.