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How to cut a large hole in a concrete wall.
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.
Get a friend to hold one end while you hold the other and run the line over the region to be cut.
If you are going to cut a hole or drill through a concrete wall use the right tools to reduce the chance of damage to the 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.
Clean out as much debris as possible and use a shop vacuum to suck out the remaining smaller particles.
A core drill is a drill bit which cuts large holes from masonry and concrete removing the centre part of the hole core as it drills.
Sooner or later every building contractor has to run pipe or conduit through existing concrete walls.
In place of the teeth is a smooth or segmented edge studded with tiny industrial diamonds that cut concrete and rebar by means of abrasion.
Here s a few pictures of the right tool.
A core drill is simply a drill bit used for making the large holes in concrete and masonry materials.
You will find most core drill bits coming in different sizes such as 2 inches or 4 inches.
There are many core drill sizes and each one is manufactured to represent the size of a commonly used pipe cable or duct.
Scrape out the hole with a mason s chisel while dislodging loose or crumbling block.
Designate the area of finished concrete to be cut using chalk lines.
When you re cutting concrete that is already poured and finished use a chalk line to mark the region.
I just like to show you a little trick some time you have to install dryer went through the concrete walls all what you need is a cut off wheel and a littl.
Lift the line simultaneously from each end and slap it to the ground.
Once you are done with the drilling it will remove the large center piece to leave you with a large hole.
Drill through each corner of your cutout using a rotary hammer equipped with a masonry bit.
A core drill with a diamond bit is the best option for round cuts that you can pass wires water lines or other things through.
These holes will mark the boundaries of the opening and help guide your cuts.
The best way to do it is by boring holes with a coring bit which looks like an oversize hole saw minus the teeth and pilot bit.
