What is the best way to make a hole in a concrete culvert without cracking it?

Answer 1

I imagine you need to make a large hole in the culvert. The simplest, though not the quickest, is to draw out the position of the future hole and then drill a series of holes, as close together as possible around the circumference you marked out.
Then when you have finished you take a deep breath and......
tap around the edge gently so as to crack the fragile space between the small holes.
When you've done that you give it a firm wallop in the middle and , Bob's your uncle, there's the job done.

Answer 2

Yes, depending on how big the hole will be, you will need a heavy duty drill that uses water while you are drilling and a special diamond bit hole cutter. I also agree with what Dunroamin says. I'm assuming the culvert is about 2" in thickness, so this would be the cheapest way to go. Lets us know how it worked out.

Answer 3

Core Drill with a Carbide Tip, a core drill uses water around and on the area being drilled, no dust, no chips to make a bad score, and the hole is clean. The speed is very low on a Core Drill because the water actually does the most work, but the drill suplys the effort.

Answer 4

Without having to invest alot of money in a big commercil core machine you can mark out the hole and use a 1/4 in. masonry bit and go around a circle about 1/4 in spacing the tap it out with a hammer

Answer 5

you can use a masonary bit for a small hole, but for anything over about an inch in diameter, youll need a core boring machine..

Answer 6

A sharp masonry bit on a high speed drill.

Answer 7

masonry bit for small hole,carbide tipped hole saw for medium,electric or gas powered saw with a masonry blade for cutting a large hole.

Answer 8

Use a masonary bit.