This study aimed to explore the use of rotary disc blades in cutting, since the mowing units used in sesame harvesting contain many parts, require frequent lubrication, and have vibration problems. An experimental setup with a disc blade working on a cut-mowing system based from harvesting methods of sesame plants was designed and fabricated. The most suitable cutting criteria which are blade edge types (30°- 30°, 30°- Flat, 45°- 45°, 45°- Flat) and disc blade diameters (150, 180, and 210 mm) were determined for shearing and disc cutting action. The lowest cutting energy was consumed by the disc blade with a 30°- wedge angle at all stem thicknesses and by the disc blade with a diameter of 180 mm for large stem thicknesses. In all pairs of edge, as the disc diameter increased, the energy spent for cutting the stems decreased. There was a significant difference between the two methods in terms of energy consumption only when cutting stems with a diameter of 10 mm. These results show that disc cutting can be recommended as a method for sesame harvesting.