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OT - What is a Core Bore?

T

Tim in New York

Member
Have a bit of a problem. We lined our fireplace hearth with a slab of granite - about 1" thick, thinking we would eventually install a propane stove in the firebox. Well, the time has come. I want to drill a hole in the granite to run the gas line up through the ash pit from the basement. Propane compnay said sure - no problem. But when the installer got here he said he did not have anything he could drill through granite with.
I remember the granite installer said we would have to drill the hole with a core borer when the time came.

I am concerned that there is enough room inside the firebox to drill the hole. I have about 5" of clearance from the back of the box. Is a core borer a special tool that takes up a lot of room? Or is it just a special bit in a heavy duty drill?

Thanks,

Tim in NY
 
It should be able to be accomplished without an overly bulky tool. Call a stone fabricator or concrete cutting contractor and ask explain your situation. I'm sure they can do it for whatever their minimum service call is.

Ben
 
It looks similar to a hole saw without the center drill bit. The cutting surface is diamond tipped. You should have plenty of room with a right angle drill.

It may be cheaper to have someone who does granite counter tops cut it for you than it would be to buy a bit.

Keith
 
to cut stone you need a diamond tipped style blade. wether its a circular blade, cup style, staight blade,cable or bit and a LOT of flowing water to keep cutter cool. Let the blade cut, don't hammer on stone it will break or break diamonds off tips.
 
What I borrowed screwed on to a small angle grinder. Worked great with a plywood jig to keep the bit in place. Water helps immensely.

If you know anybody who installed a vessel sink on stone, they needed 2 sizes. That was my application. Doesn't take long.
 
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