This is a useful trick when you need to drill blind tapped holes in concrete
A CNC machine can do this, but it requires some extra steps and materials
I'm going to show you how we did it, but first let me explain what I mean by "blind tapped holes"
Blind tapped holes are holes that have been drilled in the wrong location (or with the wrong size drill bit) and then had their hole walls countersunk over with a countersink bit. This leaves just a small counterbore around the outside of the hole
The countersinking process removes any high spots from the inside of the hole and makes it look nice and smooth from both sides of the material.
drill depth blind tapped holes on cnc
