Simultaneous 5-axis
This part illustrates the type of part that comes to mind for most people when they think of a 5-axis machining center. Simultaneous 5-axis machining in conjunction with a CAD/CAM system is the only way to make impellers and turbines.

What is 5-Sided?
5-sided machining, also known as 3+2, is the process of setting up a part one time and machining five sides using a 5-axis machining center instead of machining the part one side at a time using a conventional 3-axis machining center. 
What is 5-Axis?
The ability of a CNC machine to move a part or a tool on five different axes at the same time. 3-axis machining centers move a part in two directions (X and Y), and the tool moves up and down (Z). 5-Axis machining centers access two additional rotary axes.