Roller mills are mills that use cylindrical rollers, either in opposing pairs or against flat plates, to crush or grind various materials, such as grain, ore, gravel, plastic, and others. Roller grain mills are an alternative to traditional millstone arrangements in gristmills.

What is a roller mill used for?

Roller milling is one of many methods used to produce flour. It is a process used to separate the anatomical parts of grain kernels—like the bran, aleurone layers, germ and endosperm—and grind them down into fine flour particles.

What is the difference between a hammer mill and a roller mill?

The difference between a roller mill and a hammer mill is: A hammer mill uses rotating hammers to pound grain through a screen and it requires a lot of horsepower. ... A roller mill uses cylindrical rollers that grind the grain when it goes through them, which requires less horsepower then a similar capacity hammer mill.