When you think of CNC working, you usually think of plastic and wood. However, CNC cutting machine can also cut aluminum (a weaker metal) well. At the same time, you need to pay attention to some things. Not surprisingly, cutting aluminum has its complexity (unlike wood and plastic). The first thing to know is that aluminum is a "sticky" metal and it wants to stick to your cutting tools. As a result, removing the chip will be a little tricky (more on this later).