Explaining the Importance of Expended Collets in CNC Machining To anyone who has worked in a factory environment for any significant period of time, the fact will be evident that even the tiniest parts can determine whether a task is executed successfully or not. Expended collets definitely fit that description. They are not nearly as flashy as CNC turrets and spindle motors, but the reality is that they determine just how well the workpiece will be held in place when it comes to turning, drilling or milling tasks. Anyone who works with tube stock, thin walled pieces or internally gripped components knows this all too well. What Exactly Are Expended Collets An expended collet, sometimes written as expanding collet, is a workholding device designed to grip a component from the inside rather than the outside. Instead of clamping around the outer diameter like a standard collet, it expands outward against the internal bore of the part. This makes it a practic...