=Introduction= A chuck is a specialized type of clamp used to hold an object with radial symmetry, especially a cylinder. In a drill or a mill, a chuck holds the rotating tool; in a lathe, it holds the rotating workpiece.
Chucks commonly use jaws to hold the tool or workpiece. The jaws (sometimes called dogs) are typically arranged in a radially symmetrical pattern like the points of a star. Jawed chucks may require a wrench-like device called a chuck key to be tightened or loosened, but other jawed chucks may be tightened or loosened by hand force alone, offering convenience at the expense of gripping force. Chucks on some lathes have jaws that move independently, allowing them to hold irregularly shaped objects. More complex designs might include specially shaped jaws, greater numbers of jaws, or quick-release mechanisms.
Instead of jaws, a chuck may use magnetism, vacuum, or collets, which are flexible collars or sleeves that fit closely around the tool or workpiece and grip it when squeezed.
=Challenges=
=Approaches= * [https://www.thingiverse.com/thing:624625 3 Jaw Lathe Chuck] * [https://www.thingiverse.com/thing:624814 Reverse Jaw (1,2,3) for Lathe Chuck] * [https://www.thingiverse.com/thing:5791 Four Jaw Self Centring Chuck] * [https://www.aliexpress.com/item/32759631702.html CNC 4th Axis 3 Jaw 100mm Lathe Chuck K11-100 Hollow Shaft CNC Rotary Axis + Tailstock-5 Ratio 6:1 Hollow Shaft for CNC Router]
=References= * [https://en.wikipedia.org/wiki/Chuck_(engineering) Wikipedia: Chuck (engineering)