I need to drill a 13mm hole in a ceramic tile to fix a bathroom basin
to the wall. The largest size of tile drill bit sold by the High St
sheds is 10mm. What's the best way to proceed?
Keep using the 10mm bit to make the hole large enough or start with a
clean 10mm hole and then use a larger masonry/steel drill bit to finish
off? Tests on a spare piece of tile show the first approach giving a
hole not quite round while the second approach gives a round hole with
ragged edges.

I need to drill a 13mm hole in a ceramic tile to fix a bathroom basin
to the wall. The largest size of tile drill bit sold by the High St
sheds is 10mm. What's the best way to proceed?

13mm Tile bits are available.

Try http://www.drillbitdepot.com/GLASS_x...E_BITS2255.htm

Sean

Sean Delere wrote:
I need to drill a 13mm hole in a ceramic tile to fix a bathroom basin
to the wall. The largest size of tile drill bit sold by the High St
sheds is 10mm. What's the best way to proceed?

13mm Tile bits are available.

Try http://www.drillbitdepot.com/GLASS_x...E_BITS2255.htm

Thanks (and to all who replied). The prices are very competitive. But
as this is a one-off job (hopefully a once-in-a-lifetime job) I did try
with just a 13mm masonry drill and I got good results.

wrote:
I need to drill a 13mm hole in a ceramic tile to fix a bathroom basin
to the wall. The largest size of tile drill bit sold by the High St
sheds is 10mm. What's the best way to proceed?

Buy a 13mm masonry drill bit.


Keep using the 10mm bit to make the hole large enough

No.

or start with a
clean 10mm hole and then use a larger masonry/steel drill bit to finish
off? Tests on a spare piece of tile show the first approach giving a
hole not quite round while the second approach gives a round hole with
ragged edges.

Drill a small pilot hole, 4-5mm will do, to a depth of only a few mm.
Now use a 13mm drill bit to drill your hole.



--
Grunff

wrote:
I need to drill a 13mm hole in a ceramic tile to fix a bathroom basin
to the wall. The largest size of tile drill bit sold by the High St
sheds is 10mm. What's the best way to proceed?
Keep using the 10mm bit to make the hole large enough or start with a
clean 10mm hole and then use a larger masonry/steel drill bit to finish
off? Tests on a spare piece of tile show the first approach giving a
hole not quite round while the second approach gives a round hole with
ragged edges.


I bought an adjustable hole cutter for tiles from Tiles'r'Us - can't
remember what they're called. A centre drill with an adjustable arm -
hole size can be set from about 12mm (guess) to about 40mm (another guess).

Dave

On 6 Mar 2006 07:31:05 -0800, wrote:

I need to drill a 13mm hole in a ceramic tile to fix a bathroom basin
to the wall. The largest size of tile drill bit sold by the High St
sheds is 10mm. What's the best way to proceed?
Keep using the 10mm bit to make the hole large enough or start with a
clean 10mm hole and then use a larger masonry/steel drill bit to finish
off? Tests on a spare piece of tile show the first approach giving a
hole not quite round while the second approach gives a round hole with
ragged edges.
Use 13mm masonry in slow drill if you have.
Take it slow.Perfect hole will result.

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The message
from bill contains these words:

Use 13mm masonry in slow drill if you have.
Take it slow.Perfect hole will result.

Add water. It retains the dust and makes a sort of grinding paste that
helps the bit go through better.

--
Skipweasel
Pay no attention to the man behind the curtain.

"Guy King" wrote in message
...
The message
from bill contains these words:

Use 13mm masonry in slow drill if you have.
Take it slow.Perfect hole will result.

Add water. It retains the dust and makes a sort of grinding paste that
helps the bit go through better.

And switch off the hammer action :-0