The wear tests were carried out on a self-made simulating ensilage-cutting machine. The relative cutting between the fixed and moving cutters was kept at 20.66 m s whilst the cutting period varied from 5 to 360 min. The cutter specimens A, B. C(made from AISI 1090) and D(made from AISI 1045) were used to cut a mixture of water, grass and sand.