Abstract: A thorough analysis was made to find out the reason of the spalling in the process of producing silicon steel with single stand mill. The analysis showed that the main reasons for the spalling of the roll were work hardening, contact fatigue, insufficient chamfer design at the side of the roll and insufficient grinding amount. Combined with the actual production, the reasonable use and maintenance methods and preventive measures were put forward.

Key words: single rack, supporting roll, spalling, invalid