How To Drill A 4 Inch Hole In Concrete Wall

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.

How to drill a 4 inch hole in concrete wall.

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. Thicker points are reinforced with re bar. Blow away dust that accumulated in the guide hole. 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.

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. To drill into concrete use a hammer drill with a carbide tipped masonry bit. Drill the guide hole to a depth of 1 8 to inch. Stop the drill sweep or blow away the accumulated concrete dust and pull out the drill.

A standard drill bit is not large enough to make such a hole. 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. Do not force the drill. We will discuss the process later in this.

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. Once you have the right drill and drill bit mark the spot on the concrete you want to drill through. Then drill a shallow pilot hole using a low speed or short bursts.