How To Drill A 4 Inch Hole In Concrete Wall

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.

How to drill a 4 inch hole in concrete wall.

Blow away dust that accumulated in the guide hole. Once you have the right drill and drill bit mark the spot on the concrete you want to drill through. I need to drill a 4 hole in the foundation of our house to vent a bath fan in the basement. 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.

To drill into concrete use a hammer drill with a carbide tipped masonry bit. Then drill a shallow pilot hole using a low speed or short bursts. Drill the guide hole to a depth of 1 8 to inch. Do not force the drill.

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. 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. A standard drill bit is not large enough to make such a hole. Drill forward with steady light pressure.

Stop the drill sweep or blow away the accumulated concrete dust and pull out the drill. Thicker points are reinforced with re bar. Next turn on the drill s hammer function and start drilling applying firm but not forceful pressure.