Charlotte Core Drill

Marking Core drill holes.

template of core drill hole for concrete
When marking the layout for core drilling you have to be precise. The reason being is simple. If you layout a 100 lineal feet worth of holes that are 5' on center and are off by and 1/4" by the time you go drill your 4th hole the center's will be off by an inch. This is not something that is acceptable to most Contractors who rely on your skills to hit center every time you drill. A good way to mark centers for every core drill hole is to make a cardboard outline of the size bit you are using as a template and then transfer the layout to the concrete by using a magic marker or grease pen. If the original measurements are correct the outline of the hole on the concrete surface will be much easier to see when you core drill it.
The Tools shown above for exact layout and marking of concrete core drilling holes are homemade. On the left is cardboard cutout of a 10" core drill hole while the the right picture is of a tool we made years ago that greatly speeds up the layout of 4" and 3 1/2" core drilling holes.

BlueFlag Service's Inc.

BlueFlag Services Inc.
Home for Charlotte
Precision Core
Hey. If you got this deep into our site you might be a core driller. Did you own a core drilling rig? Would you like to be part of our company? We receive calls from all over the east coast about core drilling projects. Give us a call maybe we can work together.
124 Dorton St. #313
Charlotte NC 28213
704-245-0119 Boss's Phone
704-237-0743 Shop
How to lay out holes for core drilling.
How to sharpen a core drill bit.
How to use a submersible pump for water supply when core drilling.
How to core drill through a brick wall.
Basics of how to use a core drill machine.
plastic template of concrete core drilling hole