Let’s say you’ve recently bought a lathe and set it up in your shop ... (so we know we’re inside any runout in the chuck). I’m making two-thousandth cuts on each pass here.

whether you are replacing a lost chuck key, need an angular index, or need a dismountable drive. As the video shows, you can definitely make them on the lathe. But how the heck does this work?

CNC turning is a subtractive manufacturing method (Removal of Material). Contrary to CNC Milling Lathe machining is for circular geometries (stock is commonly a solid/hollow cylinder) but a hexagon or ...