A radial drill press is a machine that uses a rotating drill bit to drill holes in metal. It can be used in hand-held drills or on a machine that you can mount in the milling machine
This project will use a CNC router, which has been modified to allow for drilling and milling operations. You will also need a milling spindle, which is available off-the-shelf from almost any shop supply store. The spindle needs to be modified to accept the CNC router's carriage and toolhead.
convert radial drill press into cnc