After the core drill has gone through the wall up to about 0 5 inches it is advisable to unscrew the guide drill bit at this point.
How to drill hole through concrete wall.
Once the core drill starts to go through the concrete wall maintain a smooth low speed.
2 drill a pilot hole.
With the core drill in.
Mark the point on the wall where you want to drill using a soft pencil with a small dot or cross.
The hole should be slightly smaller than the maximum width of the anchor.
Here s a few pictures of the right tool.
Don your goggles then insert the appropriate tungsten carbide masonry drill bit for your desired hole size into the hammer drill.
Mark the spot on the wall or another surface where you d like to place the hole.
Put a small masonry bit into your drill.
Next get into position to drill by planting your feet firmly on.
Drill bits small holes that are only about 1 2 inch in diameter are drilled directly into the concrete.
Start drilling slowly with the attached guide drill on the core drill.
Place your drill on the mark and drill briefly using a low speed if your machine has speed control or in short bursts if it doesn t.
There are numerous types of drill bits designed for use with concrete but the key is making.
Here s how to drill into concrete with a regular old drill.
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.
Besides the core drill you will need to rent a 1 2 inch hammer drill to drill the holes for the lead anchors that you will use to use to anchor the core drill to the wall.
Remove any concrete dust then press the anchor into the hole until it is flush with the surface.
If necessary tap in lightly with a hammer.