Study on the Performances of Different Wheat Threshers

Abstract

The performances of four types of power threshers were tested for determining the grain output rate, threshing efficiency, losses, labor and power requirements of wheat threshing. The grain outputs varied from 43.17 kg/hr to 257.14 kg/hr. The threshing efficiencies were above 92.78% for all the machines. Seed damages ranged from 2.7 to 3.5% of total grain intake. The labor performance was maximum, 64.29 kg/man-hr, for Spiral thresher and minimum, 21.8 kg/hr, for Kyowa thresher. The costs of wheat threshing varied between 0.43 to 1.07 Tk/kg depending on threshers. Among the power threshers, threshing cost was minimum for Spiral thresher, the cost was the lowest, Tk 0.09 per kg, for pedal thresher. The power thresher may be used in big farms but the pedal thresher is better for small scale threshing.