How do you know whether to drill (rotating tool) or punch (non-rotating tool) holes in a particular material?
As a general rule, the cleanest hole is obtained by drilling the hole. In addition, drilling tends to extend tool life. Many punching applications require an internal support mandrel (beading) that supports the tubing to prevent collapsing the tube. Drilling, in many cases, can eliminate the time/motion required to insert and remove the beading.
