4 Axis CNC Machines are well known for their advanced features like automatic flip over of work pieces. These versatile CNC systems can perform different sorts of cutting jobs like consistent type and intermittent type with utmost precision. Just like other CNC systems, the 4 Axis CNC Machines function on X, Y and Z axes. But these also possess additional axis like A axis. As part of their mechanism, spindles tend to operate along X,, Y and Z axes in upward and downward, back and forth and side to side , but the position of the work piece remains same. A axis of these systems comes in handy during hole drilling process.