Consider the mechanism that secures toolholders to the spindle of a milling machine: the drawbar. Some mills require you to lock the spindle with a spanner wrench, loosen the drawbar with another ...

That seems to be the thinking behind this scratch-built CNC mill, and it’s only just getting ... The spindle is a BT30 with a power drawbar, belt-driven by an external motor that [Kris] doesn ...