1. Reasonable selection of grades to achieve the matching of grades of each rack.

2. Installation of the roller ring. When assembling the sleeve and the upper machine, it should be carried out in strict accordance with the design process requirements to ensure the accuracy. The roller ring and the tapered sleeve of the frame roller shaft should be properly matched. It should not be too tight or too loose. Too tight will easily cause the roller ring. Damaged; too loose will easily cause the roller to break.

3. Use appropriate cooling methods and cooling water quality. The temperature of the cooling water should be lower than 25 degrees, the pressure should be 5-6 bar, and the water volume should be 24-30 cubic meters per hour. Twice the trough, it should be sprayed directly such as rolling the trough, the water should not be scattered or misted.

4. Reasonable rolling amount. Cracks in the rolling groove are unavoidable, and when it reaches a certain depth, it is generally controlled at 0.2 mm, and it needs to be ground when necessary. Excessive rolling can easily lead to broken rolls.