A hammer mill is a versatile machine used for grinding various materials into fine or coarse particles by means of repeated hammer blows. It consists of a rotating shaft with free-swinging hammers that impact the material being fed into the chamber. These hammers pulverize the material against a screen, allowing for size reduction and uniform particle size distribution. Hammer mills are widely used in industries such as agriculture, food processing, and biomass processing for grinding grains, feed, wood chips, and other materials.