140K views · 2.5K reactions | This machine is mainly to drill farmland soil. But when you encounter the rock layer under the ground, you could use the core barrel to drill through the rock layer. The core barrel is 130mm diameter and 1.5meter length. When it is full Stuffed with stones, you have to take out the core barrel and Pour out stones. It is very low speed to drill rock, so if the rock layer is very thick, it is a not ok to use this drilling machine. | SunmoyTechnology | Facebook