Principle Operation: Selecting and grading material according to material thickness. This machine is widely available to rice, flour, oatmeal factories, brewery and seed company, etc. It can grade broken rice in rice factory and grade wheat in oatmeal factory or clean up other thinner granules. Type Thickness Grader is a cleaning device for selecting grain granule. This machine can grade different thickness grain & plant seed and rid impurities through octagonal sieve sleeve turning around horizontal shaft. Advantage: 1. The replacing time of sieve sleeve is shorter. It is convenient to maintain. 2. Each sieve sleeve is equipped with the rubber cleaning brush for cleaning up sieve and keeping the sieving capacity of sieve. 3. Simple structure, easy in maintenance. 4. The sieve pore has various specifications, is suitable for all kinds of cereals. Less equipment vibration, easy in installation.