DESIGN AND CONSTRUCTION OF A HAMMER MILL MACHINE FOR GRINDING CORN SEEDS

Abstract

This study aims to design, build, and test the performance of a small-medium scale corn kernel grinding hammer mill machine with a 0.5 HP electric motor. The test was conducted using 1 kg of dry corn kernels at three variations of engine speed, namely 492 RPM (speed 1), 903 RPM (speed 2), and 1030 RPM (speed 3), to determine the effect of rotation on milling time and fineness of the results. The results showed that at 492 RPM the milling time was 32 seconds with a result size of 6.5 mm, at 903 RPM the time decreased to 23 seconds with a size of 2 mm, and at 1030 RPM the fastest time was 15 seconds with the finest result size of 1 mm, so it can be concluded that increasing the engine speed increases the hammer impact energy, speeds up the milling process, and produces finer particles, with optimal performance achieved at 1030 RPM.