Hammer Mill (MA) | POITTEMILL - FORPLEXThe MA (or Hammer mill) is an impact grinder that crushes the input material between the hammer (or knife) plate and a stator fitted with a sieving screen perforated for the required particle size. It is generally used as a pre-grinder positioned upstream of a grinding installation. The MA breaks up blocks of raw material into.nov grinder mill ma,Amazon: 400g Electric Grain Mill Cereal Spice Grinder for Herb .Amazon: 400g Electric Grain Mill Cereal Spice Grinder for Herb Pulverizer superfine Powder Machine 110V or 220V: Kitchen & Dining. . 300g Electric Grain Mill Spice Herb Grinder Pulverizer super fine powder machine For Spice herbs grains. 300g Electric .. Date first available at Amazon, November 12, 2014.