A hammer mill has a flywheel with hammers bolted to it. It runs at a little over 3000 RPMs. Anything that gets in the way of that mass of whirling hammers gets ground up real quick. The material flies through a screen. Material that is too big to go through the screen stays in there and gets beat around u til it is small enough to go through the screen. This all happens in a fraction of a second. This is also why a hammer mill creates more dust and needs a dust collector to separate the dust from the exhausting air. A true simple hammer mill will have a separate fan that sucks the ground material out from under the screen and blows it into a cyclone or dust collector where the material drops out a chute and into a wagon or bags. A more elaborate hammer mill has an auger that augers the feed away from under the screen. So there is less dust involved. I have never used a bur mill but I would think a bur mill would be better for grinding ear corn into cattle feed. Cattle dont like fine powder in their feed.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don�t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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