Does drilling holes in metal make it weaker?
Does drilling holes in metal make it weaker? Simply removing metal is going to make it weaker, and it will concentrate the stresses around the edges of the holes, so that's no way to make it stronger. Can you drill holes in metal rod? Almost any general-purpose twist bit will do a decent job of drilling holes in metal. If you'll be drilling a lot of holes, or need to drill through hard, abrasive metals like stainless steel or cast iron, spend a couple bucks more for black oxide or a cobalt steel drill bit for metal. How do you...