View Single Post
 
Old 04-30-2019, 10:15 AM
mhonard mhonard is offline
Junior Member
Join Date: Jun 2018
Location: 50 years NE Ohio (Cleveland), 12 years Midland MI, Now The Villages Fenney since 2018
Posts: 15
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by yobeano View Post
Maybe I'm missing something but if you are trying to get through some kind of metal before you hit the concrete then you can't use a masonry bit first. I had this same issue but my beam was square metal box encased and filled with concrete so I used a regular carbide tip bit at low speed to get me through the metal than the masonry bit to finish the hole. I used tap-cons to mount my shades and complete the job.
Agreed and understand. It's the getting through the metal that is the difficulty I am having. I am using new carbide bits, slow speed and creeping up to the size I need (1/4"). Takes 4-5 bits and a lot of pressure.