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The major components of the machine are hopper to feed the tubers, crushing disc or cylinder with nail punched protrusions rotating inside crushing chamber to crush the tubers, sieving tray to remove the fibrous and other cellulosic materials, stainless steel or plastic tanks to collect the sieved starch suspension, tuber storage chamber, handle and wheels for easy transportation from place to place and a frame to support these components. Overall dimension of the machine is 135 x 180 x 132 cm and tubers can be fed by a person standing on the ground. Addition of water during the processing can be controlled through a water pipe with holes fixed inside the hopper along its length and during sieving by a shower attachment connected to the water line. An electric motor (¾ hp) or a generator (kerosene–petrol) attached to the frame can be used as the energy source to operate the machine.
The recovery of starch from the tubers crushed using this machine is 84.2, 75.1 and 39.6 % with an output crushing capacity of 200, 135 and 120 kg/h for cassava, sweet potato and Amorphophallus, respectively Rasping effect of the machine ranged from 61.10 to 40.32% It has provisions for easy transportation, to store peeled and sliced tubers, easy removal of the rasper disc, convenient to operate and easy to fabricate and maintain. These machines are suitable for use in villages, adding value to produce and generating additional employment.