I&#x27;ve used a CNC mill as a drill press when drilling a hole crosswise through a small tool steel shaft. Drill presses have too much slop in the spindle bearings for that. I&#x27;d tried doing it in a drill press, but couldn&#x27;t get it centered precisely enough. On the mill I could use a machinists vise, V-blocks, and position precisely.<p>(A useful setup I had back in my DARPA Grand Challenge days was a drill press with a cheap calibrated hand-crank X-Y table.  When you need patterns of holes to mount something, that&#x27;s an easy way to get the holes in the right places.)