Drilling 6mm holes in porcelain.

O

opps

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I probably only need to drill into porcelain tiles a few times a year. When drilling 6mm holes for fittings, I hot melt glue to stick a thick perspex plate with a 6mm hole in it over the area to be drilled. It is accurate within 0.5mm but I have to then use a scraper to remove the glue.

I know people that say they just tilt the drill bit until it starts to score the tile. Whenever I try that, the bit just skates across the tiles...
 
opps said:
But they will not go through porcelain... only diamond core bits will.
Click to expand...
can you drill a hole in a piece of wood (with a wood drill slightly bigger) with cross markings going down the sides

then clamp it in place
 
Notch7 said:
can you drill a hole in a piece of wood (with a wood drill slightly bigger) with cross markings going down the sides

then clamp it in place
Click to expand...
How will I clamp the wood to fitted tiles?

The reason that I am using the perspex is that I can see through the perspex. I can line it up and see the round pen mark on the tile.
 
I've always found a decent diamond drill in the cordless. I place the heel of the cordless on the surface and hold the drill firm at an angle until it bites in, then just gently come up straight. You do need to hold the heel of the drill on the surface otherwise as yous ay, it will skate across the tile. Try it on some scrap until you can do it every time.
 
ajstoneservices said:
Get yourself some of these. I have found them better than expensive diamond bits for really hard porcelain
Click to expand...

Tnx. I might order one of the Macrist arrow head bits

www.marcrist.co.uk

CD850 AkkuMAX Porcelain Drill - Drill Bits Products

CD850 AkkuMAX Porcelain Drill - Drill Bits Products
www.marcrist.co.uk www.marcrist.co.uk

My main gripe with the small diamond bits is the core getting stuck in the bit- that said, I have just noticed a video on the Macrist site that says you are supposed to oscillate the bit whilst drilling. I guess that means the the core becomes conical and less likely to get stuck.
 
mrrusty said:
I've always found a decent diamond drill in the cordless. I place the heel of the cordless on the surface and hold the drill firm at an angle until it bites in, then just gently come up straight. You do need to hold the heel of the drill on the surface otherwise as yous ay, it will skate across the tile. Try it on some scrap until you can do it every time.
Click to expand...

That makes sense, thanks.
 
Those bits I linked to are the nuts. And they arrive very quickly. Don't waste your money on the expensive bits as I have over the years.
 
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