Drill Bit Selection

[PatD]

Hey guys,
I am looking for the best drill bit and method to cleanly drill through glazed porcelain. I have some thoughts, but wanted to tap the experience available on the forum. Thanks!
Edit: didn't mention size, 3/4" to 1"

 

[rharshberger]

they make carbide/diamond hole saws in those sizes, slow spped and plenty of lubricant.

 

[rbeckey]

My son is a plumber and buys diamond hole saws off Amazon for that purpose. Get a water bottle and provide a steady stream right on the surface where the cutter is engaged or you'll ruin the bit and the piece.

The brand he gets is called SHDIATOOL

 

[Marc_G]

Diamond bit pilot hole followed by carbide / diamond hole saw with center pilot in the hole you already made. If practical immerse the piece in water. Make sure it is well supported so won't crack from pressure. Don't use cutting oil on porcelain, as it will soak in and stain.

 

[heada]

And go slow. Low rpms and light but steady pressure.

 

[PatD]

Thanks guys, pretty much along the same ideas I had. Really appreciate the specifics.