The Universal Nut Sheller is a simple hand-operated machine based on a Bulgarian Peanut sheller, capable of shelling 50 kilograms (110 lb) of raw, sun-dried peanuts per hour.
It requires less than US$50 in materials to make, and is made of concrete poured into two simple fibreglass molds, some metal parts, one wrench and any piece of rock or wood that might serve as a hammer. It accepts a wide range of nut sizes without adjustment. If necessary, adjustment is quickly and easily done. It is estimated that one Universal Nut Sheller will serve the needs of a village of 2,000 people. The life expectancy of the machine is around 25 years.
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