Home Product Grain Based Ethanol Hammer Mill Feeder HAMMER MILL FEEDER Homogeneous Product Feed. Drop-section design supports more even flow of material into the grinding process. Foreign-Material Collection. A lower collection pocket holds metal and stone particles not caught by the magnet. Optional Speed Adjustment. An optional speed controller allows the operating speed to be adjusted. Convenient Servicing. Removable rotor components and folding sieve clamps provide access for maintenance. Wear-Resistant Components. Hardened blades and alloyed front plates are designed to resist wear.