Thresher

This is a thresher used for separating husks from grains of rice and barley. Ears of rice or barley were put on the threshing cylinder, which was rotated by stepping on the pedal. It was also called a man-powered thresher or a cylinder thresher. The cylinder was equipped with many spiked teeth, called geupdong. Though the emergence of the man-powered thresher drastically increased efficiency, it still required heavy manual labor and failed to noticeably reduce threshing losses. This led to the invention of the automatic thresher, which was equipped with a grain sorting device, operated by electric power and enabled automatic threshing.