I have purchased the rotary tool I will use for the CNC machine. I picked a which features variable speed. Variable speed is useful for machining different materials, for example higher speeds for metal and lower speeds for plastic. This is a pretty good quality tool with no play where the bits attach and has a five year warranty. It will be removable from the machine to use for other things as well.

I needed to purchase this early so I can build a custom frame for it to fit snugly into. It’s important that is isn’t possible for the tool to move during operation of the machine otherwise the accuracy goes out of the window.

Dremel 300 Series