Abstract: A small scale threshing machine using a rotary flail wheel for threshing small lots of various seed crops. The machine includes a cylindrical hollow housing enclosing a flail wheel that rotates about a horizontal axis. A chute leads to an opening in the upright face of the housing to one side of the horizontal axis. The flail wheel includes two pair of opposed flail arms. Each arm extends substantially radially outward from the rotary axis and presents a threshing surface thereon for striking and separating seed from sheaves inserted through the chute. Shelling bars are situated adjacent the rotating flail wheels to provide obstruction to the seed or grain thereby permitting a rubbing action to thresh out seed not completely threshed by the flail arms. A baffle situated above the chute opening aids in producing an inward airflow toward the flail arms and downward toward the botton of the housing.