Yes, a small tiller can cut through grass, but it depends on the size and type of the tiller and the condition of the grass. A tiller is primarily used for digging the surface of the land for various gardening activities, but it can also be used to remove grass. However, it is important to inspect the area first to make sure there is no big grass that the tiller cannot penetrate. If you have such big weed, debris, metal, rocks, stones, or other things that can harm the blades, clean it. Even if you have a heavy-duty tiller, it won’t cut through rocks and metal and might damage the machine.