What is a hammer crusher or hammer mill?

A hammer crusher, also known as a hammer mill, is a machine that is used to crush or shred a variety of materials into smaller pieces. It consists of a rotating shaft with free-swinging hammers that impact the material being crushed. The size of the final product is determined by the size of the openings in the screen surrounding the rotor. Hammer crushers are commonly used in industries such as mining, construction, and agriculture for crushing materials like coal, limestone, and biomass.