How To Drill A 4 Inch Hole In Concrete Wall

Drill forward with steady light pressure.

How to drill a 4 inch hole in concrete wall.

Thicker points are reinforced with re bar. We will discuss the process later in this. When you have to drill large holes into concrete such as the 2 inch or 4 inch holes you will need to use a core drill. Then drill a shallow pilot hole using a low speed or short bursts.

As much as you will be using the core drill a standard drill is still required in the initial stages to make the guide hole before you can fully switch to a core drill. Drill the guide hole to a depth of 1 8 to inch. A standard drill bit is not large enough to make such a hole. Blow away dust that accumulated in the guide hole.

I need to drill a 4 hole in the foundation of our house to vent a bath fan in the basement. The walls at our new place are 6 inch thick concrete it s an old naval base and we needed a few holes for vents. Stop the drill sweep or blow away the accumulated concrete dust and pull out the drill. Once you have the right drill and drill bit mark the spot on the concrete you want to drill through.

Step 4 when you start with a guide hole at least 1 8 inch deep your drill will be easier to control but all the same continue to operate the drill with a steady light but firm touch so you re. 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. The wall is made with stay in place forms so the actual concrete forms a kind of waffle pattern which i think is about 4 thick at its thinnest point.