The size depends on the application.
Making hole in concrete wall.
A core drill is simply a drill bit used for making the large holes in concrete and masonry materials.
These holes will mark the boundaries of the opening and help guide your cuts.
Drill through each corner of your cutout using a rotary hammer equipped with a masonry bit.
The guys at home depot had a lot of fun lamenting the fact that the hole existed to begin with and then suggested that i build a mold on one side of the wall and fill it in with a pour of concrete.
Unless you want to buy a hilti dd100 and the bits which will cost you way more than hundreds.
Expand the drill hole to accommodate the anchor.
After hearing that i seriously considered just gluing a piece of plywood over it and calling it a day.
Once you are done with the drilling it will remove the large center piece to leave you with a large hole.
You will find most core drill bits coming in different sizes such as 2 inches or 4 inches.
I ve hammer drilled through concrete to sink anchors but a 4 inch diameter hole is a little intimidating until you have the right tool.
5 line up the blade of a.
Menards and other places rent core drills for large holes in concrete.
Easiest way is to call diamond drilling or a similar company and have them come out and drill all your holes for a few hundred dollars.
Match the correct anchor size to that of the concrete screw.
Here s a few pictures of the right tool.
If necessary tap.
The hole should be slightly smaller than the maximum width of the.