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E.Central MN | Roller mills have two spline type rollers (one rotates clockwise, one rotates counterclockwise). You adjust the rollers closer together or further apart depending upon how much pressure you want to put on the grain that goes thru it. Grain gets rolled as it passes between the rollers, similar to how hay gets rolled when it goes thru the conditioner rollers on a haybine.
Hammer mills have a large drum with metal hammers that rotates inside a chamber that has a screen on one side. The grain gets hammered until it fits thru the screen openings where an auger pulls it away. Various screens are available-some have small holes for very fine feed, some have very big holes for coarse feed.
That's the basic difference. | |
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