Performance Studies on Plot Thresher for Wheat

The effects of various operational factors like feed rate and cylinder speed on grain loss, sieve loss, cleaning efficiency, threshing efficiency of a spike tooth cylinder type plot thresher having dimensions 925 x 700 x 925 mm were studied. The feed rates taken were 150 kg/h, 252 kg/h and 348 kg/h. At each feed rate, the observations were taken at cylinder speed of 775 rpm, 900 rpm and 1050 rpm. The optimum combination of feed rate and cylinder speed was found to be 252 kg/h and 900 rpm respectively. At this combination the threshing efficiency, cleaning efficiency and total grain loss were observed to be 99.14%, 99.97% and 1.3%, respectively.