The MALTMILL is an authentic roller mill that makes it possible for homebrewers to turn out textbook quality milled grain. It crushes the malt, leaving the husk intact while producing a minimum of flour. Not one grain can get through without being properly milled. It does exactly what a malt mill is supposed to do.
The MALTMILL is provided with a nominal spacing of .045" between the rollers. This produces an excellent crush on all commonly used malt. An adjustable version is available for those who perceive the need for additional flexibility . The roller journals ride in oil-impregnated bronze bearings, pressed into aluminum castings. A coarse textured surface on the rollers prevents the grain from slipping and is the key to providing an efficient mill at far less cost then conventional multiple stage roller mills.
The MALTMILL relies on the grain to drive the passive roller and the above cited throughput is based on this configuration. For additional efficiency, in high volume operations, a Gear Drive Option (GDO) is available to drive the passive roller directly from the driven roller through precision-ground, steel gears. These gears have different numbers of teeth, to provide a differential rotational rate for the rollers.
36mil / 0.92mm / 0.036 inch (universal setting)
This crush has been produced with a 2 roller mill (JSP Maltmill) at its factory setting of 36 mil / 0.92 mm. At this setting, which is fairly loose, no substantial husk shredding occurs while the endosperm is mostly ground into grits. Some of the endosperm is left behind in the husks. The low percentage of flour and well preserved husks will make for easy lautering. But even with well modified malts, the conversion efficiency will only be average.19 mil / 0.48mm / 0.019 inch (tight setting)
At a much tighter setting (19 mil / 0.48 mm), the same mill will produce considerably more flour and shredded husks. While the efficiency is significantly increased, the lauter may not run as easily and may even get stuck if the allowed run-off speed is to fast. The increased conversion efficiency make this an attractive option for brewers but the significantly slower run-off causes many to widen the gap at least a little bit.Motorize Your Grain Mill: Projects
How to and why to
A common drill motor can motorize most mills. The problem with this approach is, while it works, it simply works too fast. Optimum roller speed for small homebrew mills is 150–200 rpm. Drills and most AC motors run at 1,750 rpm (U.S. 60 cycle AC.) The answer is to use pulleys and belts or an expensive gear reduction motor to run your mill more slowly.
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