The purpose of the small- size rice and peanut threshing machine is to increase the efficiency in separating the rice seed and peanut from the leaves and other waste materials. There are 5 important parts : 1. the structure and power supply source, 2. the threshing set consists of 8 and 9 rubber bars placed alternately in 6 rows, 3. two sieves : the upper with a hole diameter of 19 mm. for the rice seed and peanuts and the lower without holes for the waste materials , 4. the fan for blowing the soils or other materials out of the rice seed or the peanuts, 5. The tray for carrying out the waste materials.. The threshing operation starts by putting the rice or peanuts into colander in the feed slot, then the threshing set turns the rice or peanut bunches. After that, all the leaves and other materials are removed from the rice and peanuts will drop into the lower sieve and the rice seed or peanuts will fall into the upper one. Finally, the fan blows the soil and other waste materials from the rice and peanuts that are separated.
From the test, it is found that the threshing speed of 550 rpm. in average can get the rice seed or peanuts 38.37 km/hr. The breaking weight is 0.5 kg/hr. in average. The efficiency of the threshing is 99.5% with weight and the threshing speed is 650 rpm. will get the rice seed of 85 kg per hour.