What technique do I need to use for drilling out a steel screw? Might be stainless, not sure.
I'm using a Milwaukee M18Fuel hand drill and Milwaukee cobalt bits. It's a powerful drill.
I've made a mark with a center punch and am using a moderate amount of pressure. I drill for ~10 seconds and let the drill rest for 20. I put a drop of thread cutting oil on the screw every other time. I'm using the slower "1" setting on the drill. Problem is, it seems to be taking FOREVER and I'm not sure if I'm doing something wrong. Don't want to damage the drill or destroy all my bits.
BTW, I've tried everything before deciding to drill the screw but everything failed: impact driver, impact screwdriver, vice grips, all the stuff that gets repeated on the web. Nothing worked. The screw is stuck. I think this is a self-drilling screw. This is to gain access to a junction box that the previous homeowner screwed shut for some unknown reason. Don't care about damaging the junction box cover.