Enlarging a hole in granite

So, we just had our kitchen faucet fail. Momma picked out the new one she wanted, the faucet install went well until I went to put the soap dispenser in. The new one is slightly larger than the diameter of the old hole it is to go in. The counter top is granite. I was wondering if anybody had a suggestion how to make it just a bit bigger? I was thinking I’d use a half round metal file?

 

How much is "just a bit"?
Don't know if a metal file is going to get any traction at all on granite. You want something abrasive, like an abrasive stone or diamond. Silicon Carbide lapping paste on a wood dowel may work. Used to be able to get it at auto parts stores.

Depending on the size, I would be looking at a diamond encrusted hole saw, made for tile & glass.

 

Thanks, a friend just turned me on to a rotary bit that I think will work. It only needs to be 1/8 inch or less larger.

 

1/2 round metal file might make progress..

 

This is what he sent me

 

Good tip Eric VW !!

 

Will do!

 

10-4!

 

I used a diamond router bit in my router to smooth the cuts on this curve.
I cooled it with water from a hose while I was routing it.

 

Nice JotulYokel!

 

Yep that silica dust is nasty stuff for your lungs.

Sent from my moto g(7) using Tapatalk

 

Definitely. Wear a

 

Mask

 

That's a great cut...It was the polishing that was a PITA when we did our bathroom countertop!

 

You will burn that up in no time. Not made for granite.

If you can rent the right size holesaw with a guide, that would be the waybto do it. Otherwise, you would be money ahead to call a granite installer and have it done.

 

You will probably have more in the diamond bits and masks than it will cost to have a fabricator come and re-drill the hole. I would say for $20-50 bucks cash, someone would stop in an evening and drill the thing out quicker than you could get set up. Not worth the headache and you definitely don't want to try a file doing it by hand, you will be there awhile. Most of what I see is either the CNC drilling the holes at the shop with water or diamond hole saws attached to an angle grinder on site with a vac system.

 

Somebody will show up at my house to do a job for 20-50$? That is unheard of around here. Not trying to sound like a jerk but I really don’t see it happening.

Case in point recently needed a mixing valve replaced on a shower. I cut the drywall out to make it easy for the plumber and most guys wanted to charge 100$ just to show up then whatever they wanted to do the job on top.