I think the stencil marks on my old hammer mill indicate 2200-3300RPM. It was originally flat belt driven. I converted it to PTO with a drive taken off an MC grain dryer which was converted to electric motor. I can't tell you the size of the pulleys without measuring them. It takes a 1000 RPM PTO to achieve speed. If I want a coarse grind, or to just crack grain, running much slower works, but the blower part then can't develop enough draw to take the material away. I think if it was set up so the material could just fall away by gravity, it would work.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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