Roller mill Wikipedia
Flour is sieved out of the cracked grain, and then the coarse grist and husks are sent through the second set of rollers, which further crush the grist without damaging the crusts. Similarly, there are threeroller mills, in which one of the rollers is used twice. Five and sixroller mills Sixroller mills have three sets of rollers. When using this type of mill on grain, the first set of rollers crush the whole kernel,