On 26/03/2021 18:14, Bert Coules wrote:
The Natural Philosopher wrote:

I think the ONLY thing that worked for me was
a bit of MDF with a 6mm hole in it.

How did you hold it in place?

wiv me ovver hand...

I've been experimenting on a spare tile and using the start-at-an-angle
technique I've successfully drilled a 6mm and an 8mm hole with very
little chipping around the perimeter.Â* But drilling two holes in a tile
clamped horizontally in a Workmate in aÂ* room with with lots of space to
move around is presumably rather different to drilling ten holes in a
vertical tiled wall while standing in a shower enclosure.

One thing that I do now know: when the core drills broke completely
through the tile, the drill slammed forward and the face of the chuck
met the tile with some force.Â* There was nothing behind it, where in the
actual job there will be plasterboard (which should make a slight
difference, maybe), and no damage to the tile resulted, but it's still
something to be wary of.

Tomorrow I tackle the actual work...




--
€œThe fundamental cause of the trouble in the modern world today is that
the stupid are cocksure while the intelligent are full of doubt."

- Bertrand Russell