Coal mill hollow shaft, also called grinding unit, which usually made of cast steel, hollow cylinder with a flange, which is mounted at both ends of the cylinder, bear the entire load of the entire body and the grinding mill in cross varying stress continuous operation. The hollow shaft is one of the key parts of the coal mill, mill body is the weakest link, the most difficult to control the quality of the parts, it can safe operation, will directly affect the production.

Recently, Great Wall Steel Casting Company received a steel users to buy coal mill hollow shaft. After in-depth conversation, the user is supporting the hollow shaft coal mill occurred successively feed the air shaft, the compound by the air shaft R zone portion and a shaft neck cracking accident, seriously affected the normal operation of coal mills, therefore, it needs to cast plant in accordance with the existing coal mill machining a hollow shaft.

Based on past experience in processing,Great Wall Steel Casting Company hollow shaft that the user situation occurs mainly due to the strength of the R zone does not comply, and the hollow shaft R zone due to stress concentration and material internal casting defects. To this end, Great Wall Steel Casting Company users coal mill hollow shaft dimensional tolerances, geometric tolerances, surface roughness, according to the economic and building materials precision machining equipment specification has been designed to strictly control the hollow shaft design, manufacturing installation, every off used to avoid failures processing for users of the hollow shaft.