dbbls wrote:
Lynnmor wrote:
RinconVTR wrote:
Masonry bits wont touch metal...doesnt matter what they are made of...forget that.
Last resort, if you insist on not making new holes with new screws (which I dont understand) buy couple 1/8"-3/16" carbide ball end mills from McMaster. They will get that screw out, but it will still be tricky alignment.
Masonry drills have carbide tips. Yes, carbide will cut metal. The cheap masonry drills sometimes need to be sharpened.
I have never used a concrete bit that would drill steel. Don't think they exist. When you hit a rebar while drilling in concrete you are stopped.
Thought maybe I was losing it in my old age. So I went to my tool & die shop that I ran for the past 30 years and did a test. Using a 3/16" cheap masonry drill running at 2000 RPM, I drilled through a 1/4" thick piece of cold rolled steel in 50 seconds. It made a very neat hole as well. But what do I know, I only worked in the trade for just over a half a century.
