5. Set sieve to optimize both grain cleaning and air flow to the chaffer. “If you close the lower sieve too much it can restrict airflow to the chaffer,” Peters says. “It’s like putting ...

upper sieve and lower sieve. The goal is to “float” the mat of grain and residue across the sieves on a cushion of air so the shaking motion of the sieves allows the grain to fall down through ...

separating by screening or sieving those foreign substances whose specific gravity will not allow of their passing off by the action of a proper blast ; third, of depriving the, grain of all smut ...