What's the difference between a 2-axis machine and a 3-axis machine? As the term suggests, a 3-axis machine has one more axis than a 2-axis machine, that is Z-axis. Let's take a 3-axis 3-head roller brush making machine as an example. While making a roller brush, the worktable of the 3-axis 3-head machine should move left/right (supported by X-axis) and forward/backward (supported by Y-axis), also its grippers should keep rotating (supported by Z-axis). In the field of brush production, 3-axis machine are normally used to make industrial roller brushes, round cleaning brushes and curved toilet brushes, etc.