A conservative estimate of production rate for our Hammer Mills with 6mm screens: 158 Hammer Mill = ~30 pounds (1/2 bushel) of shell corn per minute. 198 Hammer Mill = ~60 pounds (1 bushel) of shell corn per minute. 420 Hammer Mill = ~150 pounds (2 ½ bushels) of shell corn per minute. Warning: Raw material size entering the Hammer Mill depends on type of material. PelletMasters Hammer Mills ship .